Moparts
Need ideas for a 450HP build on my 383/ street motor?
Posted By: RUMBLON
Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 07:15 AM
OK, I am going to build my original 383 for this 63 Polara vert. However I want to pep it up a bit. I would like to get 450 HP and make it very streetable. Its its original 63 383. I dont know the heads of this era and I am open to buying a set of Eddy heads or what ever it takes to make it right.
The car will have its power steering, power brakes and after market air.
I had planned on using my 500 (650 HP) stroker for this project but my engine builder says he thinks its not right for the street.Solid lifter motor and would not last long when cruising in it.
So I need to build a nice running 383. what have you folks done and what suggestions do you have on what to use from this engine and what to replace or upgrade.
RUMBLON
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 07:17 AM
ORIGINAL ENGINE
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 07:18 AM
ONE MORE
Posted By: 70Cuda383
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 11:47 AM
stock stroke, high compression, good heads, and a big cam would get you there I'd think.
or you can cheat, drop a 440 stroke crank in there from your choice of stroker sources, (aftermarket that's already made for the 383/400 mains) and turn the 383 into a 426, 431, or 438 depending on how much you have to bore the cylinders. That, combined with compression, head flow, and cam, will get you 450-500 hp that is VERY streetable.
my 383 stroker was making over 500 lbs of torque at 3,000 rpm where the dyno started measuring, and it stayed at a nice flat 500 lbs through the RPM range, peaking at 535 at 3800, and made a peak of 505 hp. that's with the above combo--440 stroke, flat top pistons, eddy heads, comp's xe-275-hl hydraulic cam.
Posted By: Mr.Yuck
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 01:49 PM
I'd say the cheapest would be to get a set of 440 source heads and storker kit and roll. Well unless you can find a deal on a complete Big Block already done.
Posted By: 64Post
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 04:33 PM
I'd suggest a smaller stroker (438) with a stable CH piston, Stealth/Eddy heads, Eddy RPM, higher compression at your altitude, a nice hyd. cam, 1-3/4" headers, 2-1/2 exhaust. Should have no problem hitting 450 HP. It's also do-able with stock displacement but you'd have to get a bit more aggressive with the choices.
I made about 560 HP (and left about 20-30 HP on the table) with my 383/451, but it's not a cruising combo.
Posted By: patrick
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 05:27 PM
Quote:
stock stroke, high compression, good heads, and a big cam would get you there I'd think.
or you can cheat, drop a 440 stroke crank in there from your choice of stroker sources, (aftermarket that's already made for the 383/400 mains) and turn the 383 into a 426, 431, or 438 depending on how much you have to bore the cylinders. That, combined with compression, head flow, and cam, will get you 450-500 hp that is VERY streetable.
my 383 stroker was making over 500 lbs of torque at 3,000 rpm where the dyno started measuring, and it stayed at a nice flat 500 lbs through the RPM range, peaking at 535 at 3800, and made a peak of 505 hp. that's with the above combo--440 stroke, flat top pistons, eddy heads, comp's xe-275-hl hydraulic cam.
for a street driver I'd follow this recipie...the smallish cam should have good streetability, tons of torque and good power to about 5500 RPM.
if you're buying a new crank, I'd go past the 3.75" stroke and into a 4.15" crank, if you can find a shelf piston for a 4.28" bore/4.15" stroke combo. would yield 478 cubes and probably 520-560 lb ft of torque, with about 500 HP
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 05:29 PM
Quote:
Quote:
stock stroke, high compression, good heads, and a big cam would get you there I'd think.
or you can cheat, drop a 440 stroke crank in there from your choice of stroker sources, (aftermarket that's already made for the 383/400 mains) and turn the 383 into a 426, 431, or 438 depending on how much you have to bore the cylinders. That, combined with compression, head flow, and cam, will get you 450-500 hp that is VERY streetable.
my 383 stroker was making over 500 lbs of torque at 3,000 rpm where the dyno started measuring, and it stayed at a nice flat 500 lbs through the RPM range, peaking at 535 at 3800, and made a peak of 505 hp. that's with the above combo--440 stroke, flat top pistons, eddy heads, comp's xe-275-hl hydraulic cam.
for a street driver I'd follow this recipie...the smallish cam should have good streetability, tons of torque and good power to about 5500 RPM.
if you're buying a new crank, I'd go past the 3.75" stroke and into a 4.15" crank, if you can find a shelf piston for a 4.28" bore/4.15" stroke combo. would yield 478 cubes and probably 520-560 lb ft of torque, with about 500 HP
There isn't a shelf piston for that stroke , 3.75 , 3.9 and 4.25 all use the same CH piston , 1.32 . Diamond has a piston for a 3.75 stroke using the std length B rod for a taller piston .
Posted By: moparlifer
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 05:37 PM
Call Jim Laroy in Challis Id and have him build it for you, He's a great Mopar guy.
Posted By: 64Post
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 08:10 PM
Quote:
Quote:
Quote:
stock stroke, high compression, good heads, and a big cam would get you there I'd think.
or you can cheat, drop a 440 stroke crank in there from your choice of stroker sources, (aftermarket that's already made for the 383/400 mains) and turn the 383 into a 426, 431, or 438 depending on how much you have to bore the cylinders. That, combined with compression, head flow, and cam, will get you 450-500 hp that is VERY streetable.
my 383 stroker was making over 500 lbs of torque at 3,000 rpm where the dyno started measuring, and it stayed at a nice flat 500 lbs through the RPM range, peaking at 535 at 3800, and made a peak of 505 hp. that's with the above combo--440 stroke, flat top pistons, eddy heads, comp's xe-275-hl hydraulic cam.
for a street driver I'd follow this recipie...the smallish cam should have good streetability, tons of torque and good power to about 5500 RPM.
if you're buying a new crank, I'd go past the 3.75" stroke and into a 4.15" crank, if you can find a shelf piston for a 4.28" bore/4.15" stroke combo. would yield 478 cubes and probably 520-560 lb ft of torque, with about 500 HP
Diamond has a piston for a 3.75 stroke using the std length B rod for a taller piston .
Good call. Didn't know about those pistons. By my math that gives a 1.75"-ish CH. Not too tall; not too short. A cleaned up stock forged crank and maybe some new CCJ rods and you're into it pretty reasonably. 
Posted By: RemCharger
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 08:21 PM
Dare to be rare.
Stock stroke 383s can and do make power. Source heads just make it easier and cheaper.
Posted By: patrick
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 08:34 PM
Quote:
Quote:
Quote:
stock stroke, high compression, good heads, and a big cam would get you there I'd think.
or you can cheat, drop a 440 stroke crank in there from your choice of stroker sources, (aftermarket that's already made for the 383/400 mains) and turn the 383 into a 426, 431, or 438 depending on how much you have to bore the cylinders. That, combined with compression, head flow, and cam, will get you 450-500 hp that is VERY streetable.
my 383 stroker was making over 500 lbs of torque at 3,000 rpm where the dyno started measuring, and it stayed at a nice flat 500 lbs through the RPM range, peaking at 535 at 3800, and made a peak of 505 hp. that's with the above combo--440 stroke, flat top pistons, eddy heads, comp's xe-275-hl hydraulic cam.
for a street driver I'd follow this recipie...the smallish cam should have good streetability, tons of torque and good power to about 5500 RPM.
if you're buying a new crank, I'd go past the 3.75" stroke and into a 4.15" crank, if you can find a shelf piston for a 4.28" bore/4.15" stroke combo. would yield 478 cubes and probably 520-560 lb ft of torque, with about 500 HP
There isn't a shelf piston for that stroke , 3.75 , 3.9 and 4.25 all use the same CH piston , 1.32 . Diamond has a piston for a 3.75 stroke using the std length B rod for a taller piston .
then I'd probably go 3.9 or 4.25 for a street car, and keep the powerband in the idle-5500 RPM range.
Posted By: njdevil2
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/18/11 09:03 PM
Not to hijack this thread, but I plan to do something simaler, I'm trying to do 400 HP with a stock '70 roadrunner 383. It already has a 440 cam and 9.5:1 compression. It has the CH4B (I think) Aluminum Edelbrock intake from 1969. I have aquired a Holley 670 Street Avenger. I'm pretty sure that the 1.75" headers are the thing I need for the exhaust with 2.5" exhaust pipes. Does this sound like the right recipe? I'm trying not to mod the internals, it's a recent rebuild. Any suggestions on the header brand?
Posted By: MRBELV2
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 12:33 AM
How about the 528 solid cam in a zero deck (approx 10-1)engine with the eddies, RPM, and your choice of 4bbl carb? May be close to your HP goal.
Posted By: 2264PLY
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 12:39 AM
Does it have to be 383? A 440 would get you there so much easier.
Posted By: RemCharger
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 12:44 AM
Quote:
Not to hijack this thread, but I plan to do something simaler, I'm trying to do 400 HP with a stock '70 roadrunner 383. It already has a 440 cam and 9.5:1 compression. It has the CH4B (I think) Aluminum Edelbrock intake from 1969. I have aquired a Holley 670 Street Avenger. I'm pretty sure that the 1.75" headers are the thing I need for the exhaust with 2.5" exhaust pipes. Does this sound like the right recipe? I'm trying not to mod the internals, it's a recent rebuild. Any suggestions on the header brand?
I would use (and do) the 1 7/8 hookers. The cam is small if its the chrysler cam. there were two... small and smaller.
But if you already have everything, they will work well as a mild combo. You can easily change cam/carb/intake down the road. 
Posted By: HYPER8oSoNic
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 12:48 AM
Quote:
Dare to be rare.
Stock stroke 383s can and do make power. Source heads just make it easier and cheaper.
Good advice.
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 12:53 AM
Quote:
Not to hijack this thread, but I plan to do something simaler, I'm trying to do 400 HP with a stock '70 roadrunner 383. It already has a 440 cam and 9.5:1 compression. It has the CH4B (I think) Aluminum Edelbrock intake from 1969. I have aquired a Holley 670 Street Avenger. I'm pretty sure that the 1.75" headers are the thing I need for the exhaust with 2.5" exhaust pipes. Does this sound like the right recipe? I'm trying not to mod the internals, it's a recent rebuild. Any suggestions on the header brand?
Intake would be the DP4B , CH4b is the 440 intake .
Who rebuilt it, what pistons are in it? Many people THINK they are building 9.5 or 10.0 compression 383 with the currently available pistons but unless they zero deck the block and cut the heads down to at least 82ish cc then it's not really that high ... or use the KB 400 DOME piston. The stock 68/69 383 HP has 9.3 compression at best, how anyone thinks they are building a 9.5 or 10.0 engine with a piston that is .024 or more in the hole without zero decking AND use a composite head gasket that almost twice as thick ass the original is beyond me.
Posted By: BSB67
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 03:32 AM
The term "very streetable" means different things to different people. If it means smooth idle in neutral (14 -15" vacuum) and in gear with a stock torque convertor, hydraulic cam and pump gas, it will be difficult getting to an honest 450 hp IMO. In my experiance you can get to 1.0 to maybe 1.1 hp/cu.in. under those conditions. Go to 440 cu.in, it gets a lot easier.
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 06:13 AM
Quote:
Does it have to be 383? A 440 would get you there so much easier.
I am currently out of 440s, except the finished solid lifter done 500 stroker I have sitting in the shop, that was originally for a drag car that I wont be using now.
My engine builder believes that its best to use that motor for what it was intended to be for or sell it or trade it for a done motor for this car.
So I was hoping to build the 383 that I have. But This is why I am posting the thread. To weigh out my options.
RUMBLON
Posted By: Cab_Burge
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 07:48 AM
Quote:
Quote:
Does it have to be 383? A 440 would get you there so much easier.
I am currently out of 440s, except the finished solid lifter done 500 stroker I have sitting in the shop, that was originally for a drag car that I wont be using now. My engine builder believes that its best to use that motor for what it was intended to be for or sell it or trade it for a done motor for this car. So I was hoping to build the 383 that I have. But This is why I am posting the thread. To weigh out my options.RUMBLON
Can you get a stock stroke forged steel BB crankshaft that is not turned on the rods? If so you can build a really nice street stroker using a BB crank(fairly inexpensive with a good shop, you will need to turn the mainss down also to stock 383 sizes ) and have it offset ground to BB Chevy rod sizes with a 3.91 or 3.90 stroke, 6.8 or 6.7 long BB chevy H beam rod and a custom piston with a dish or reverse dome fo compression under 10.0 to 1 , not above with stock close chamber iron heads If you decide to go with a set of new aluminum heads then shoot for 10.0 to 10.7 to 1 compression for premium pump gas I don't have the exact C.I. for a 4.280 to a 4.310 bore with a 3.91 stroke but I'm sure it is near 450 C.I., lots of torque and good HP 
And it lloks stock
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 03:04 PM
Quote:
Quote:
Does it have to be 383? A 440 would get you there so much easier.
I am currently out of 440s, except the finished solid lifter done 500 stroker I have sitting in the shop, that was originally for a drag car that I wont be using now.
My engine builder believes that its best to use that motor for what it was intended to be for or sell it or trade it for a done motor for this car.
So I was hoping to build the 383 that I have. But This is why I am posting the thread. To weigh out my options.
RUMBLON
Why not just change the cam and the intake on that motor and use it if you have no intention of doing a drag car now ? It would be alot cheaper than building a new engine and you are going to end up selling that 500" engine for pennies on the dollars you spent building it. Of course this is ASSuMEing it's not a 13.0 compression engine.
Posted By: GomangoCuda
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 03:15 PM
Quote:
Of course this is ASSuMEing it's not a 13.0 compression engine.
And so what if it is 13-1? It would still be much cheaper to change pistons in this one than to build a whole new engine that would have a lot less potential.
Posted By: DPelletier
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:01 PM
build a nice torquey 383 stroker. 450hp out of a stock stroke 383 isn't necessarily "streetable" depending on what you really mean by that. Does "streetable" mean "the ability to drive the car on the street" or does it mean a mellow idle, high vacuum, pump gas motor that doesn't have to be revved to the moon to make decent power?
For the stated purpose, if I was trying to keep the costs down, I'd spend the money on the stroker kit before the heads....
Dave
Posted By: court9155
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:14 PM
How about just use the 383 with a good balance job
Put these pistons in it:
http://www.summitracing.com/parts/SLP-WL2315F30/Fresh 906s with good valves and springs (little extra coin from them):
http://www.aeroheadracing.com/id6.htmlHughes whiplash cam:
http://www.hughesengines.com/Index/produ...mp;partid=25115And this with just 100HP jets:
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=192Should make 450hp
I know I love the sound of this cam at idle and it is supposed to be ground to cater to low compression.
Ill let you know how this works because it is the EXACT combo that I am going to run unless PROBE makes there new pistons with the 5/64 rings and two valve reliefs (supposed to be ligther) for a 4.280 bore and 3.375 stroke with stock rod length
Posted By: DPelletier
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:44 PM
everbody knows that nitrous doesn't count!
Dave
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:45 PM
Quote:
Quote:
Of course this is ASSuMEing it's not a 13.0 compression engine.
And so what if it is 13-1? It would still be much cheaper to change pistons in this one than to build a whole new engine that would have a lot less potential.
You forget, more than likely, having to rebalance for the heavier piston.
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:49 PM
Quote:
How about just use the 383 with a good balance job
Put these pistons in it:
http://www.summitracing.com/parts/SLP-WL2315F30/
Fresh 906s with good valves and springs (little extra coin from them):
http://www.aeroheadracing.com/id6.html
Hughes whiplash cam:
http://www.hughesengines.com/Index/produ...mp;partid=25115
And this with just 100HP jets:
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=192
Should make 450hp
I know I love the sound of this cam at idle and it is supposed to be ground to cater to low compression.
Ill let you know how this works because it is the EXACT combo that I am going to run unless PROBE makes there new pistons with the 5/64 rings and two valve reliefs (supposed to be ligther) for a 4.280 bore and 3.375 stroke with stock rod length
He can get the same lackluster heads for less at a local shop with just a rebuild of cores he has, plus I wouldn't use 906's because of the open chamber design.
If you are starting from scratch as it sounds you are find some 915 heads .
Posted By: RemCharger
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:52 PM
Open to Eddys or source heads.
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 04:55 PM
Quote:
Open to Eddys or source heads.
The OP is open to EDDY's , he said so in his original post .
For a fresh build from scratch if one is not building for a specific class of racing , or just wants to retain factory parts , new alum heads would be the way to go .
Posted By: court9155
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 05:00 PM
Quote:
Quote:
How about just use the 383 with a good balance job
Put these pistons in it:
http://www.summitracing.com/parts/SLP-WL2315F30/
Fresh 906s with good valves and springs (little extra coin from them):
http://www.aeroheadracing.com/id6.html
Hughes whiplash cam:
http://www.hughesengines.com/Index/produ...mp;partid=25115
And this with just 100HP jets:
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=192
Should make 450hp
I know I love the sound of this cam at idle and it is supposed to be ground to cater to low compression.
Ill let you know how this works because it is the EXACT combo that I am going to run unless PROBE makes there new pistons with the 5/64 rings and two valve reliefs (supposed to be ligther) for a 4.280 bore and 3.375 stroke with stock rod length
He can get the same lackluster heads for less at a local shop with just a rebuild of cores he has, plus I wouldn't use 906's because of the open chamber design.
If you are starting from scratch as it sounds you are find some 915
heads .
Lackluster lol, maybe to a guy that already has or has had several 450hp plus motors but to most guys the results will be far from lackluster. There is always a better way to build a motor or a cheaper way or this, that etc.
My post was more or less meant to throw an idea out there. Not the ultimate B block 450hp build. Mine was more budget minded.
Aerohead will build 915s for 100 AND they will install better exhaust valves (for the nitrous) like some manley extremes for a tad bit more money too.
I put some 906 heads on my buddies car and they looked nice and performed very well for an as cast 906. Sure they didnt make 450hp but they ran well and the motor sounded good.
Next best thing would be 440source heads (budget minded) but they dont come with nice manley or ferrea valves. They come with ok valves. I also dont like the way the seats are machined. I know I have a set and had them fixed. Ended up being into them almost 2,000 dollars.
I was just throwing it out there (using a little nitrous)......... and to be honest with the nitrous it wont really matter what heads and compression he has when the button is pushed
Dan
Oh and nitrous does count! LOL how do you think the chevys keep up!!
hahaa just kiddin.
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 05:09 PM
Quote:
Quote:
Quote:
How about just use the 383 with a good balance job
Put these pistons in it:
http://www.summitracing.com/parts/SLP-WL2315F30/
Fresh 906s with good valves and springs (little extra coin from them):
http://www.aeroheadracing.com/id6.html
Hughes whiplash cam:
http://www.hughesengines.com/Index/produ...mp;partid=25115
And this with just 100HP jets:
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=192
Should make 450hp
I know I love the sound of this cam at idle and it is supposed to be ground to cater to low compression.
Ill let you know how this works because it is the EXACT combo that I am going to run unless PROBE makes there new pistons with the 5/64 rings and two valve reliefs (supposed to be ligther) for a 4.280 bore and 3.375 stroke with stock rod length
He can get the same lackluster heads for less at a local shop with just a rebuild of cores he has, plus I wouldn't use 906's because of the open chamber design.
If you are starting from scratch as it sounds you are find some 915
heads .
Lackluster lol, maybe to a guy that already has or has had several 450hp plus motors but to most guys the results will be far from lackluster. There is always a better way to build a motor or a cheaper way or this, that etc.
My post was more or less meant to throw an idea out there. Not the ultimate B block 450hp build. Mine was more budget minded.
Aerohead will build 915s for 100 AND they will install better exhaust valves (for the nitrous) like some manley extremes for a tad bit more money too.
I put some 906 heads on my buddies car and they looked nice and performed very well for an as cast 906. Sure they didnt make 450hp but they ran well and the motor sounded good.
Next best thing would be 440source heads (budget minded) but they dont come with nice manley or ferrea valves. They come with ok valves. I also dont like the way the seats are machined. I know I have a set and had them fixed. Ended up being into them almost 2,000 dollars.
I was just throwing it out there (using a little nitrous)......... and to be honest with the nitrous it wont really matter what heads and compression he has when the button is pushed
Dan
Oh and nitrous does count! LOL how do you think the chevys keep up!!
hahaa just kiddin.
Dan you have obviously not seen the posts about aeroheads and their quality or lack there of , that is why I say lackluster , there is nothing special about what they do , just a standard valve job , and it's been said to not be very good . with that in mind , and core charges AND shipping half way across the country you can do better LOCAL .
906's with the open chamber are a BAD choice, I use them because I HAVE TO, not because I want to, so I have a lot more money tied up in cylinder heads than I really should.
I've got 3 pairs of 906's, one set pure stock legal ... $1200, one set with very mild port work that had been worked on twice because the first shop made them flow worse ... $1600, then a set that are a stage 2ish port job, that started off as a backyard template job that wasn't very good, $1500 ... If I had to sell them I'd be lucky to get 50 cents on the dollar for what I spent.
I have a set of 915's that will end up on the stock 383 once I get the pure stock bug out of my system.
Posted By: court9155
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 05:12 PM
Quote:
Quote:
Quote:
Quote:
How about just use the 383 with a good balance job
Put these pistons in it:
http://www.summitracing.com/parts/SLP-WL2315F30/
Fresh 906s with good valves and springs (little extra coin from them):
http://www.aeroheadracing.com/id6.html
Hughes whiplash cam:
http://www.hughesengines.com/Index/produ...mp;partid=25115
And this with just 100HP jets:
http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=192
Should make 450hp
I know I love the sound of this cam at idle and it is supposed to be ground to cater to low compression.
Ill let you know how this works because it is the EXACT combo that I am going to run unless PROBE makes there new pistons with the 5/64 rings and two valve reliefs (supposed to be ligther) for a 4.280 bore and 3.375 stroke with stock rod length
He can get the same lackluster heads for less at a local shop with just a rebuild of cores he has, plus I wouldn't use 906's because of the open chamber design.
If you are starting from scratch as it sounds you are find some 915
heads .
Lackluster lol, maybe to a guy that already has or has had several 450hp plus motors but to most guys the results will be far from lackluster. There is always a better way to build a motor or a cheaper way or this, that etc.
My post was more or less meant to throw an idea out there. Not the ultimate B block 450hp build. Mine was more budget minded.
Aerohead will build 915s for 100 AND they will install better exhaust valves (for the nitrous) like some manley extremes for a tad bit more money too.
I put some 906 heads on my buddies car and they looked nice and performed very well for an as cast 906. Sure they didnt make 450hp but they ran well and the motor sounded good.
Next best thing would be 440source heads (budget minded) but they dont come with nice manley or ferrea valves. They come with ok valves. I also dont like the way the seats are machined. I know I have a set and had them fixed. Ended up being into them almost 2,000 dollars.
I was just throwing it out there (using a little nitrous)......... and to be honest with the nitrous it wont really matter what heads and compression he has when the button is pushed
Dan
Oh and nitrous does count! LOL how do you think the chevys keep up!!
hahaa just kiddin.
Dan you have obviously not seen the posts about aeroheads and their quality or lack there of , that is why I say lackluster , there is nothing special about what they do , just a standard valve job , and it's been said to not be very good . with that in mind , and core charges AND shipping half way across the country you can do better LOCAL .
906's with the open chamber are a BAD choice, I use them because I HAVE TO, not because I want to, so I have a lot more money tied up in cylinder heads than I really should.
I've got 3 pairs of 906's, one set pure stock legal ... $1200, one set with very mild port work that had been worked on twice because the first shop made them flow worse ... $1600, then a set that are a stage 2ish port job, that started off as a backyard template job that wasn't very good, $1500 ... If I had to sell them I'd be lucky to get 50 cents on the dollar for what I spent.
I have a set of 915's that will end up on the stock 383 once I get the pure stock bug out of my system.
No, I haven't seen the post about Aerohead...wow. The one set of 906s my buddy bought from them seemed to work great.
Thanks for the heads up, Ill check into it.
Thought that maybe this one time the rule, you get what you pay for, could be broken.
If thats the case, I guess 440 source heads are gonna look better and better to him.
Dan
Posted By: GomangoCuda
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 05:35 PM
Quote:
Quote:
Quote:
Of course this is ASSuMEing it's not a 13.0 compression engine.
And so what if it is 13-1? It would still be much cheaper to change pistons in this one than to build a whole new engine that would have a lot less potential.
You forget, more than likely, having to rebalance for the heavier piston.
Didn't forget. Why would the lower compression pistons be heavier? Diamond flat top or dish piston is lighter than Diamond Dome piston. Same with Ross. It won't cost any more to rebalance the 500 than it would to balance the 383 so that is a wash.
Posted By: furious70
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 05:48 PM
you could pressurize the intake on a 383", use a creamy smooth cam and have plenty of streetability.....
Posted By: court9155
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/19/11 06:03 PM
Quote:
you could pressurize the intake on a 383", use a creamy smooth cam and have plenty of streetability.....
Very true....S300s on sale as well as S400s
I have used VRracing for a few turbo purchases and some misc. turbo parts and I was very happy with the price, shipping and customer service.
http://www.theturboforums.com/smf/index.php?topic=147425.0
Me, personally, there is nothing like the sound of an old school motor with better than 9.5 to one compression and a healthy cam.
My turbocharged 6.0 LS chevy motor in my fox body mustang with garret turbo made insane power but sounded like a 318 2 barrel with cats on it, underwater....except at full boost.
The turbo just quieted the motor so much.
Dan
Posted By: gch
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 01:25 AM
I say get the source/edelbrock heads,have the valve job checked,and put springs to match the cam.
You havent mentioned the gears.That would factor heavily into the cam on a 383 build.Be pretty easy to get 425hp out of this with some good heads and still be smooth down low.
Even 400hp will be sweet.Build for torque,put some 3.23's in it and cruise.Will be a blast from a roll on the street.
Posted By: HYPER8oSoNic
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 02:00 AM
Quote:
I say get the source/edelbrock heads,have the valve job checked,and put springs to match the cam.
You havent mentioned the gears.That would factor heavily into the cam on a 383 build.Be pretty easy to get 425hp out of this with some good heads and still be smooth down low.
Even 400hp will be sweet.Build for torque,put some 3.23's in it and cruise.Will be a blast from a roll on the street.
Biggest factors ARE the cam/converter/compression and gears. The carb size is determined by a REALISTIC max rpm dictated by the combination.
Posted By: Dodgem
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 02:27 AM
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 04:45 PM
Quote:
Quote:
Quote:
Does it have to be 383? A 440 would get you there so much easier.
I am currently out of 440s, except the finished solid lifter done 500 stroker I have sitting in the shop, that was originally for a drag car that I wont be using now.
My engine builder believes that its best to use that motor for what it was intended to be for or sell it or trade it for a done motor for this car.
So I was hoping to build the 383 that I have. But This is why I am posting the thread. To weigh out my options.
RUMBLON
Why not just change the cam and the intake on that motor and use it if you have no intention of doing a drag car now ? It would be alot cheaper than building a new engine and you are going to end up selling that 500" engine for pennies on the dollars you spent building it. Of course this is ASSuMEing it's not a 13.0 compression engine.
John, I thinks thats the way I am going to go.However I thought my engine builder said he would have to change more than that.
The motor is only 10:5 compression.500 stroker.I have lost the cam sheet and receipts from440 source but its one of their stroker kits. And then my guy bought and did the eddy heads with aluminum rockers.
so you think its just a cam replacement and intake? would the aluminum rockers live long on the road? How about the push rods? I thought he said he had to change those or maybe it was just check them.
what cam would you guys recommend and manifold if this is the case and what HP do you think I would be at?
RUMBLON
Posted By: GomangoCuda
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 05:12 PM
That changes everything. Use the 500. The compression is perfect for an aluminum head street engine. You need to find out what cam is in it. It may be OK to use. What manifold is on it? Chances are it is OK also. The rockers will be OK as long as they are not some inexpensive Chinese junk. If they are then they wouldn't have held up in a race motor either. As far as the pushrods go, he probably wants to check the length with what ever cam would be put in.
IMO you already have the right engine sitting there ready to use unless the cam is way too big.
Should be way past your Horsepower goal even with a mild street cam.
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 06:28 PM
Quote:
That changes everything. Use the 500. The compression is perfect for an aluminum head street engine. You need to find out what cam is in it. It may be OK to use. What manifold is on it? Chances are it is OK also. The rockers will be OK as long as they are not some inexpensive Chinese junk. If they are then they wouldn't have held up in a race motor either. As far as the pushrods go, he probably wants to check the length with what ever cam would be put in.
IMO you already have the right engine sitting there ready to use unless the cam is way too big.
Should be way past your Horsepower goal even with a mild street cam.
OK here are a few pics.I dont think the rockers are cheap ones but then again, I am not the builder. I do want to use this motor if at all possible if its not going to cost a ton.
RUMBLON
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 06:29 PM
INTAKE
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 06:30 PM
ROCKERS
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 06:30 PM
MORE ROCKERS
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 06:31 PM
OK
Posted By: GomangoCuda
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 07:33 PM
Find out what cam is in it. There's your engine. There are more street worthy intakes out there but that one will work for now. Do you have a Carb for it? $200-$250 would get you a more street friendly intake.
Rocker arms look good enough.
Posted By: RemCharger
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/20/11 07:37 PM
Looks good to me
Rockers look like they're of asian descent , but if the cam isn't to heavy duty, should be ok.
Is it a roller cam? If its a solid ft, I don't see any problem running it. Check lash a few times , and let er eat.
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 12:20 AM
Quote:
Looks good to me Rockers look like they're of asian descent , but if the cam isn't to heavy duty, should be ok.
Is it a roller cam? If its a solid ft, I don't see any problem running it. Check lash a few times , and let er eat.
What would a good cam and intake be for this?
Posted By: Prince_Valiant
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 01:06 AM
I'd run a performer RPM, maybe with the divider ground down and a 2" spacer and if you're looking to stick with flat HYD, maybe go with a hughes HEH3742BL or HEH4246 (237/242 @ .050, .584/.592 lift w/ 1.6 rockers, 108 LSA or the later which is 242/246 @ .050, .592/.606, 108lsa)...that should hopefully keep cylinder pressures down so that you'd be happy with pump gas and still make PLENTY of power.
The amount of low/mid range torque w/ either cam would be stupefying though.
Nor would I be adverse to doing a basic 383...with a good "268" cam and tri-y headers with good AL heads it'd be a nice street combo that would certainly be enjoyable at a cruise night and smile inducing at a stoplight drag
Posted By: 64Post
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 01:06 AM
Quote:
Quote:
Looks good to me Rockers look like they're of asian descent , but if the cam isn't to heavy duty, should be ok.
Is it a roller cam? If its a solid ft, I don't see any problem running it. Check lash a few times , and let er eat.
What would a good cam and intake be for this?
You have to choose intakes wisely as hood clearance can become an issue.
Posted By: JohnRR
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 02:40 AM
Run a performer RPM , find out what cam is in there and ask the builder about the rockers, if they are (insert board sponsor here) or CAT rockers TAKE THEM OFF NOW AND THROW THEM AWAY .
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 03:26 AM
Quote:
Run a performer RPM , find out what cam is in there and ask the builder about the rockers, if they are (insert board sponsor here) or CAT rockers TAKE THEM OFF NOW AND THROW THEM AWAY .
I called my builder. Its been a long time but he said he does not buy cheap rockers. Also I think I screwed this up, the cam is a big roller cam. I think I said solid before. He also feels that we can change the cam, lifters,springs,and manifold and be good.
Posted By: Cab_Burge
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 06:48 AM
Those look like a set of T&D rockers
Good stuff
That intake works well on big motors also
Its ready to run, check the cam for duration and lift and see if you want to try it before "fixing it"
Posted By: patrick
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 03:28 PM
with 500+ inches, the single plane will probably be OK on a street car....
for a cam, I'd talk to tim at bullet cams and have them grind one. you could stick with a solid roller, since you already have the expensive part (lifters), and just get one with semi-mild ramps, probably [Email]250-260@.050[/Email] duration, and ~.4-.42" of lobe lift, maybe something like their R294/415 on the intake?
and it will make way more than 450hp....
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 05:36 PM
Quote:
Those look like a set of T&D rockers Good stuff That intake works well on big motors also Its ready to run, check the cam for duration and lift and see if you want to try it before "fixing it"
Cab thanks. This builder is the same guy who built that 572 Indy Maxx motor a few years back. Hes a good builder so I didnt think he would throw any junk on it for lifters. But I also like to get opinions from mopar folks on here as hes a builder of all brands since the 60s. Would you keep the roller cam or go with a solid roller cam.This is going to be driven a lot and have after market A.C. Power steering and power brakes.
RUMBLON
Posted By: Cab_Burge
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/21/11 05:42 PM
Quote:
Quote:
Those look like a set of T&D rockers Good stuff That intake works well on big motors also Its ready to run, check the cam for duration and lift and see if you want to try it before "fixing it"
Cab thanks. This builder is the same guy who built that 572 Indy Maxx motor a few years back. Hes a good builder so I didnt think he would throw any junk on it for lifters. But I also like to get opinions from mopar folks on here as hes a builder of all brands since the 60s. Would you keep the roller cam or go with a solid roller cam.This is going to be driven a lot and have after market A.C. Power steering and power brakes.
RUMBLON
I like big cams in stroker street motors, especially solid roller cams 
There are draw backs like roller life when compared to the hydraulic roller lifters in the same motor. Find out the specs on the cam and let us know or PM me for future suggestions, no sense in getting into a discussion on cam lobes with everybody and there brothers on here 
I will need to know more about the car also like converter size and brand, rear gear ratio, car weight and some other things 
Posted By: RUMBLON
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/22/11 06:57 PM
Quote:
I'd run a performer RPM, maybe with the divider ground down and a 2" spacer and if you're looking to stick with flat HYD, maybe go with a hughes HEH3742BL or HEH4246 (237/242 @ .050, .584/.592 lift w/ 1.6 rockers, 108 LSA or the later which is 242/246 @ .050, .592/.606, 108lsa)...that should hopefully keep cylinder pressures down so that you'd be happy with pump gas and still make PLENTY of power.
The amount of low/mid range torque w/ either cam would be stupefying though.
Nor would I be adverse to doing a basic 383...with a good "268" cam and tri-y headers with good AL heads it'd be a nice street combo that would certainly be enjoyable at a cruise night and smile inducing at a stoplight drag
Thanks for the part numbers. I think I am on the right track. This sure beats letting a race motor sit and building a whole new engine.
And Cal, the builder says he thinks your right on the rockers, thats a typical rocker he uses.
Dave
Posted By: gch
Re: Need ideas for a 450HP build on my 383/ street motor? - 04/22/11 07:48 PM
I run the 237/242 solid version in my 496 and it runs very well.Likes to shift at 5600/5700 rpm.
IN your case I would give the Holley street Dominator and a 1" tapered 4 hole spacer some thought.Nothing wrong with the rpm.I think the stroker will breath better up top with a single plane.
Posted By: HYPER8oSoNic
Re: Need ideas for a 450HP build on my 383/ street motor? - 05/08/11 03:33 AM
As a final thought on a 450 hp 383 big block, check this article out:
"383 Power Play" by Steve Dulcich, in Engine Masters,
Spring 2009. Well thought out and done mostly with
production pieces that passed inspection. Simple, EFFECTIVE bolt-ons that yielded GOOD power!! Good tech, Steve!