Previous Thread
Next Thread
Print Thread
Page 1 of 3 1 2 3
Need ideas for a 450HP build on my 383/ street motor? #975479
04/18/11 03:15 AM
04/18/11 03:15 AM
Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
RUMBLON Offline OP
master
RUMBLON  Offline OP
master

Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
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

6590162-WP_000261.jpg (98 downloads)
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RUMBLON] #975480
04/18/11 03:17 AM
04/18/11 03:17 AM
Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
RUMBLON Offline OP
master
RUMBLON  Offline OP
master

Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
ORIGINAL ENGINE

6590164-IMG_1641.jpg (136 downloads)
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RUMBLON] #975481
04/18/11 03:18 AM
04/18/11 03:18 AM
Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
RUMBLON Offline OP
master
RUMBLON  Offline OP
master

Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
ONE MORE

6590165-WP_000262.jpg (112 downloads)
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RUMBLON] #975482
04/18/11 07:47 AM
04/18/11 07:47 AM
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
Too Many Posts
70Cuda383  Offline
Too Many Posts

Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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.


**Photobucket sucks**
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RUMBLON] #975483
04/18/11 09:49 AM
04/18/11 09:49 AM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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.


[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: Mr.Yuck] #975484
04/18/11 12:33 PM
04/18/11 12:33 PM
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post Offline
master
64Post  Offline
master

Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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.

Last edited by 64Post; 04/18/11 12:36 PM.
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: 70Cuda383] #975485
04/18/11 01:27 PM
04/18/11 01:27 PM
Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
patrick Offline
I Live Here
patrick  Offline
I Live Here

Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
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


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: patrick] #975486
04/18/11 01:29 PM
04/18/11 01:29 PM
Joined: Jan 2003
Posts: 74,905
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

Joined: Jan 2003
Posts: 74,905
U.S.S.A.
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 .

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RUMBLON] #975487
04/18/11 01:37 PM
04/18/11 01:37 PM
Joined: Feb 2006
Posts: 187
good ole USA
M
moparlifer Offline
member
moparlifer  Offline
member
M

Joined: Feb 2006
Posts: 187
good ole USA
Call Jim Laroy in Challis Id and have him build it for you, He's a great Mopar guy.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: JohnRR] #975488
04/18/11 04:10 PM
04/18/11 04:10 PM
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post Offline
master
64Post  Offline
master

Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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.

Last edited by 64Post; 04/18/11 04:12 PM.
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: 64Post] #975489
04/18/11 04:21 PM
04/18/11 04:21 PM
Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger Offline
master
RemCharger  Offline
master

Joined: Nov 2004
Posts: 2,825
Sk. Canada
Dare to be rare.
Stock stroke 383s can and do make power. Source heads just make it easier and cheaper.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: JohnRR] #975490
04/18/11 04:34 PM
04/18/11 04:34 PM
Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
patrick Offline
I Live Here
patrick  Offline
I Live Here

Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
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.


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: patrick] #975491
04/18/11 05:03 PM
04/18/11 05:03 PM
Joined: Jan 2004
Posts: 457
Hightstown, NJ
njdevil2 Offline
mopar
njdevil2  Offline
mopar

Joined: Jan 2004
Posts: 457
Hightstown, NJ
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?


1970 road runner Convertible
1 of 179
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: njdevil2] #975492
04/18/11 08:33 PM
04/18/11 08:33 PM
Joined: Jan 2006
Posts: 71
Tehachapi CA
M
MRBELV2 Offline
member
MRBELV2  Offline
member
M

Joined: Jan 2006
Posts: 71
Tehachapi CA
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.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: MRBELV2] #975493
04/18/11 08:39 PM
04/18/11 08:39 PM
Joined: Apr 2008
Posts: 84
ohio
2
2264PLY Offline
member
2264PLY  Offline
member
2

Joined: Apr 2008
Posts: 84
ohio
Does it have to be 383? A 440 would get you there so much easier.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: njdevil2] #975494
04/18/11 08:44 PM
04/18/11 08:44 PM
Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger Offline
master
RemCharger  Offline
master

Joined: Nov 2004
Posts: 2,825
Sk. Canada
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.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RemCharger] #975495
04/18/11 08:48 PM
04/18/11 08:48 PM
Joined: Nov 2009
Posts: 2,275
Desert Tracker
H
HYPER8oSoNic Offline
top fuel
HYPER8oSoNic  Offline
top fuel
H

Joined: Nov 2009
Posts: 2,275
Desert Tracker
Quote:

Dare to be rare.
Stock stroke 383s can and do make power. Source heads just make it easier and cheaper.




Good advice.



"Stupidity is Ignorance on Steroids"
"Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
Re: Need ideas for a 450HP build on my 383/ street motor? [Re: njdevil2] #975496
04/18/11 08:53 PM
04/18/11 08:53 PM
Joined: Jan 2003
Posts: 74,905
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

Joined: Jan 2003
Posts: 74,905
U.S.S.A.
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.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: RUMBLON] #975497
04/18/11 11:32 PM
04/18/11 11:32 PM
Joined: Feb 2005
Posts: 4,309
Prospect, PA
BSB67 Offline
master
BSB67  Offline
master

Joined: Feb 2005
Posts: 4,309
Prospect, PA
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.

Re: Need ideas for a 450HP build on my 383/ street motor? [Re: 2264PLY] #975498
04/19/11 02:13 AM
04/19/11 02:13 AM
Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
RUMBLON Offline OP
master
RUMBLON  Offline OP
master

Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
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

Page 1 of 3 1 2 3






Powered by UBB.threads™ PHP Forum Software 7.7.1