MP .474 or .484 in a 383?
#596382
01/28/10 11:57 AM
01/28/10 11:57 AM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I have a buddy of mine who was offering me this purple cam for my 383. He ran it for a while in his 440 before he swapped cams and went with the larger .509 mp cam.
My car is a stock 4 speed, manual brakes, and power steering so vacuum is not an issue here. Weighs roughly 3800-4000lb and is going to be mainly a street car. The car does have the stock AC in case anyone is wondering and 3.23 gears but can bump to a 3.55 if necessary. Most of the 383 will be stock, minus the headers, performer intake, and carb. I'm going to do some head work on my stock 346's. I was looking at the XE262 comp cam but If I get a freebie cam that'll save me some money.
Last edited by CurYellowBird; 01/28/10 01:32 PM.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: P4120235 in a 383?
[Re: stumpy]
#596384
01/28/10 12:29 PM
01/28/10 12:29 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
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Posts: 12,291
Kent, Wa
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I ran one for years,, was very happy with it. and yes, I would do it again...
I am truckless..
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Re: P4120235 in a 383?
[Re: OzHemi]
#596386
01/28/10 12:40 PM
01/28/10 12:40 PM
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Joined: Aug 2007
Posts: 6,095 Valencia, España
NachoRT74
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Valencia, España
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one year ago I was getting critics because I choosen the 474/280 cam on my 400 thinking on a driver with AC LOL ( changing pistons and TC of course ), and ppl was despiting the 284/474 on a BB ( 400/383 ) now does look thi is nice even on an AC car ( true this time is 4 speed, and that makes difference ) funny funny funny. ( of course, will wait to watch next opinions coming )
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: P4120235 in a 383?
[Re: OzHemi]
#596387
01/28/10 12:40 PM
01/28/10 12:40 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I plan on getting matching lifters if he doesn't have them (And he probably doesn't). He's one of those old guys who was a professional drag racer for dodge back in the 60's and 70's. The other guy we know built the engines for dodge and plymouth, and he likes the cam as well. https://board.moparts.org/ubbthreads/showflat.php?Number=4522035This is the other thread I found on another guy asking about the cam.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: P4120235 in a 383?
[Re: pushbutton]
#596391
01/28/10 02:06 PM
01/28/10 02:06 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I am going to mill the heads and what not to raise compression. I will be using the #'s matching 383 block from my car. It won't see a whole lot of drag time but I want the power to put the typical ricer in his place. My only issue is knowing how the 4 speed works with all of this cause I have no experience on that side of the house. As I said before, I am probably going to do a gear swap. I have an 8 3/4 not a dana.
Last edited by CurYellowBird; 01/28/10 02:10 PM.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: ireland383]
#596393
01/28/10 02:33 PM
01/28/10 02:33 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I still see it listed as $109. Where did you find that price?
the last catalog I got.
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Re: MP .474 or .484 in a 383?
[Re: Mr.Yuck]
#596396
01/28/10 02:47 PM
01/28/10 02:47 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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I'd go lunati voodoo 60302, comp XE268 or lunati voodoo 60303 with comp #911 springs.
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)
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Re: MP .474 or .484 in a 383?
[Re: DusterKrazy]
#596397
01/28/10 02:50 PM
01/28/10 02:50 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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Anyone have opinions on the .474 version?
What exactly is the right combo for the .484? Most guys I've seen are running 3.91 gears. Will it work with 346 heads?
My only concern is the torque side. 71' Roadrunners weigh roughly 3800-4000lb so that's another factor.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: ireland383]
#596399
01/28/10 03:00 PM
01/28/10 03:00 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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Yeah roughly a year or so ago when I first got the car. Problem lately is that I haven't been able to make up my mind.
I went out and bought a 440 long block complete out of a 78 winnebago. But recently I felt that it would be better to leave the number drivetrain in the car.
The reason I'm searching into cams so much is that you really cant overcam a 440. It is easily done with a 383 so that is why i'm looking into it. Another reason is I'm torn between the MP line and Comp cams line. Both offer really good cams and designs. I just don't want to go back and do a cam swap again. I had to do it twice in my chevy and it sucks.
Plus all I got last time were all the guys bashing on MP and didn't really get any pros and cons to comp cams and MP. It was really one sided.
Last edited by CurYellowBird; 01/28/10 03:02 PM.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: ireland383]
#596401
01/28/10 03:07 PM
01/28/10 03:07 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I was looking at that one or the XE262 for the extra torque. I'm also shooting for good sound too which comes from the centerline.
What are you running now Ireland?
Last edited by CurYellowBird; 01/28/10 03:08 PM.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596402
01/28/10 03:10 PM
01/28/10 03:10 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Anyone have opinions on the .474 version?
What exactly is the right combo for the .484? Most guys I've seen are running 3.91 gears. Will it work with 346 heads?
My only concern is the torque side. 71' Roadrunners weigh roughly 3800-4000lb so that's another factor.
the 474 would be better for your application. As for what do you need to make the 484 work...compression, decent heads, headers, stall (you have pedals so no big deal there) and at least 3.91's especially in a heavy car.
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Re: MP .474 or .484 in a 383?
[Re: Paul_Fancsali]
#596404
01/28/10 04:29 PM
01/28/10 04:29 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I do want the power but I plan on taking a cross country trip when the car is done from san antonio, tx to central maine.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596405
01/28/10 04:45 PM
01/28/10 04:45 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
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.050 duration on a 484 is ~241, the 474 is around 232, IIRC.
for a heavy car and highway gears, I'd keep .050 duration ~224@.050 max, otherwise you'll be disappointed with idle-3500 RPM performance.
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)
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Re: MP .474 or .484 in a 383?
[Re: patrick]
#596407
01/28/10 04:48 PM
01/28/10 04:48 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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Camquest shows the 268AH-10 to give me the best results but that's just on the engine and not the rest of the drivetrain.
Here are the specs:
Advertised Duration 268 int./276 exh. Advertised Exhaust Duration 276 Advertised Intake Duration 268 Basic Operating RPM Range 1,600-5,600 Cam Style Hydraulic flat tappet Camshaft Gear Attachment 1-bolt Computer-Controlled Compatible No Duration at 050 inch Lift 222 int./226 exh. Exhaust Duration at 050 inch Lift 226 Exhaust Valve Lash 0.000 in. Exhaust Valve Lift with Factory Rocker Arm Ratio 0.464 in. Grind Number 268AH-10 Intake Duration at 050 inch Lift 222 Intake Valve Lash 0.000 in. Intake Valve Lift with Factory Rocker Arm Ratio 0.464 in. Lobe Separation (degrees) 110 Notes Single-bolt camshaft, fits factory ID 2899206. Quantity Sold individually. Valve Lift with Factory Rocker Arm Ratio 0.464 int./0.464 exh.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596408
01/28/10 04:53 PM
01/28/10 04:53 PM
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Joined: Jan 2003
Posts: 6,531 Jacksonville, FL
Chris2581
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We ran the old version of the 474 in our 383 Road Runner for many years.In fact it still has that same cam.It's a great cam,we ran 12.20's with it and it streetable and delivers good power.I'd use it over the 484 on the street with you car.
Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596409
01/28/10 06:37 PM
01/28/10 06:37 PM
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Joined: Jan 2003
Posts: 17,840 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
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Quote:
Camquest shows the 268AH-10 to give me the best results but that's just on the engine and not the rest of the drivetrain.
Here are the specs:
Advertised Duration 268 int./276 exh. Advertised Exhaust Duration 276 Advertised Intake Duration 268 Basic Operating RPM Range 1,600-5,600 Cam Style Hydraulic flat tappet Camshaft Gear Attachment 1-bolt Computer-Controlled Compatible No Duration at 050 inch Lift 222 int./226 exh. Exhaust Duration at 050 inch Lift 226 Exhaust Valve Lash 0.000 in. Exhaust Valve Lift with Factory Rocker Arm Ratio 0.464 in. Grind Number 268AH-10 Intake Duration at 050 inch Lift 222 Intake Valve Lash 0.000 in. Intake Valve Lift with Factory Rocker Arm Ratio 0.464 in. Lobe Separation (degrees) 110 Notes Single-bolt camshaft, fits factory ID 2899206. Quantity Sold individually. Valve Lift with Factory Rocker Arm Ratio 0.464 int./0.464 exh.
Near identical specs to the MP 272/.455 which I feel is the best overall choice. .474 is an ok second choice but I wouldn't go any bigger than that
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596412
01/28/10 08:42 PM
01/28/10 08:42 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Posts: 27,421
Balt. Md
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I have used both the .484 and the .474 cams in street cars. Both screamed in the cars but they had the right setup. I had the .474 in a stock 340 Dart with headers and a 650 DP. It had 4.10's and it would smoke the tires from a 15 mph roll. Took it to the track and ran 13.49 @ 105 on real street tires. I had the .484 in my old 383 Dart that was a stock 383 with bolt on's and some mild pocket porting on the 452 heads I used. Click the link for the details. It ran 12.30's @ 110 best with 3.91's after I switched the Torker intake for an RPM. I do agree for your car the .474 would work better then the .484. But if you plan to keep the 3.23's I would call a cam company and have them grind you a cam for your application. Ron http://www.bigblockdart.com/ron_nies/ron_nies.htm
Last edited by 383man; 01/28/10 08:45 PM.
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Re: MP .474 or .484 in a 383?
[Re: BSB67]
#596414
01/28/10 08:57 PM
01/28/10 08:57 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I'm not dead set on keeping the 3.23's. So I'll probably just find another third member so I don't have to use my #'s one. I know my old man has more than one sitting around the house and one is a 3.91 gearing. I'll probably go with the .474 to work with my AC and with a 4 speed it should do pretty good in the 1/4.
I sent comp cams a request to get there 2 cents. I'll probably just stick with MP.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596416
01/29/10 12:42 AM
01/29/10 12:42 AM
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Joined: Jan 2003
Posts: 5,439 So Cal
Sinitro
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Quote:
I have a buddy of mine who was offering me this purple cam for my 383. He ran it for a while in his 440 before he swapped cams and went with the larger .509 mp cam.
My car is a stock 4 speed, manual brakes, and power steering so vacuum is not an issue here. Weighs roughly 3800-4000lb and is going to be mainly a street car. The car does have the stock AC in case anyone is wondering and 3.23 gears but can bump to a 3.55 if necessary. Most of the 383 will be stock, minus the headers, performer intake, and carb. I'm going to do some head work on my stock 346's. I was looking at the XE262 comp cam but If I get a freebie cam that'll save me some money.
Which 484 Mopar cam, as there are 2 of them.. The original one (P4120235) and the later one (P5007697).
The original 484 has a great idle lope and runs well in a 4 Speed car up to 6K, but has low vacuum.. (<8") If street driving and car has power brakes and auto trans, the later 484 is a better choice for street driveability.
Just my $0.01..
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Re: MP .474 or .484 in a 383?
[Re: Sinitro]
#596417
01/29/10 12:54 AM
01/29/10 12:54 AM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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It is one of the original 484 with the 108 centerline. As I mentioned I have manual brakes and 4 speed so vacuum and torque converter are no concern.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596418
01/29/10 01:49 AM
01/29/10 01:49 AM
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Joined: Jan 2003
Posts: 1,263 Southwestern Ontario Canada
racealittle
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Quote:
I do want the power but I plan on taking a cross country trip when the car is done from san antonio, tx to central maine.
I have a 9.3:1 440 that has had a .474 280 MP cam in it for at least 12 years. I have run the MP .590, .557, .528, .509, .484, and comp cam .501.
The motor sounds sweet, and has a very good torque curve. A factory type 2400 rpm converter, and 3.23 to 4.10 is all you need. I know you have a stick. There is a couple of tenths difference between the gears I listed, and the 4.10 is actually too much unless you have eddy heads, the rpm intake and tti headers. The motor pulls hard all the way to over 6000 rpm.
If you just have manifolds, full exhaust, stock or performer intake, stock heads, the motor is just about done at 5200 rpm. You could rev it higher, but there is no gain at the track.
The difference between the two combinations is anywhere from 1.5 to 2 full seconds of difference in my experience. I've gone a best of 111.9 mph in the quarter at 3900 plus lbs.
I've been tempted to put the .528 cam in, but the .474 just works so well as a driver, needing just a minimum amount of pedal to be a fun car. With a 3.23 gear, cruising at 70 mph is OK and 108-109 mph in the quarter still happens.
The fuel economy is approaching 20 mpg if I can cruise around 50-55 mph and keep my foot in check. I'm tempted to try my 2.72 gear for cross country driving.
I had a chance to do a few runs on a chassis dyno and had 389 hp on the best run at the rear wheels. I think that I could find more with another cam, but it may not be as much fun. Sometimes, less is more.
Too many cars, too many parts, too little coin, too little space to work in, too little time left to make it all happen!
Update: down to one ride, still too many parts, a little more jingle in the pocket, gaining space, and it's going to happen this year!
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Re: MP .474 or .484 in a 383?
[Re: 71383beep]
#596420
01/29/10 02:36 AM
01/29/10 02:36 AM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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Looking at your spec card, it looks like comp decided to use almost all the same specs but shorten the intake duration and lengthen the exhaust duration. Not a bad idea utilizing the larger exhaust valves on stock heads, or any other head for that matter.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596421
01/29/10 03:23 AM
01/29/10 03:23 AM
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Joined: Jun 2006
Posts: 5,161 CT
GTX MATT
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Quote:
Looking at your spec card, it looks like comp decided to use almost all the same specs but shorten the intake duration and lengthen the exhaust duration. Not a bad idea utilizing the larger exhaust valves on stock heads, or any other head for that matter.
The Mopar published numbers aren't very accurate anyway. They just multiply the advertised duration by .85. Apparently the Mopar 509 is over 250 @ .050. Anyway, I have a friend with the Nostalgia 509 in a Dart. Its just as fast as the Mopar cam (he had one in there before but the cam went south), but idles better.
Anyway, I understand that you're trying to not spend on the cam here. If you're being offered the two I would take the 474, it has a 110 LSA which will work better with your manifolds, and obviously less duration. But you will have to change the springs too. Are you getting those for free? Because the Mopar ones aren't cheap. If you have to buy a timing chain, and replace your valve locks and retainers, and obviously you need valve stem seals, Comp sells kits with all of the above for $420. So you might get the cam for free, but not save much after you buy the other stuff. Just food for thought.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: MP .474 or .484 in a 383?
[Re: gch]
#596423
01/29/10 11:38 AM
01/29/10 11:38 AM
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Joined: Feb 2009
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CurYellowBird
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The guy I know is only offering me the .484 cam. He doesn't have the .474. So I'll probably end up going with comp cams nostalgia version. Whichever one I can get a better deal on. I'm not too keen on re-using someone else cam, just my preference on that.
Are the factory springs in a 383HP not able to put up with that small of a cam lift?
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: Mr.Yuck]
#596425
01/29/10 12:13 PM
01/29/10 12:13 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
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I know about the summit cams too. I'm running the .442/.460 version in my sbc 350 and have had very good luck with it. I'll look into it.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596426
02/07/10 11:39 PM
02/07/10 11:39 PM
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Joined: Nov 2009
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HYPER8oSoNic
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Quote:
I'm not dead set on keeping the 3.23's. So I'll probably just find another third member so I don't have to use my #'s one. I know my old man has more than one sitting around the house and one is a 3.91 gearing. I'll probably go with the .474 to work with my AC and with a 4 speed it should do pretty good in the 1/4.
I sent comp cams a request to get there 2 cents. I'll probably just stick with MP.
If you do stick with MP, the grind you would go with would be P4452993, 280/474 110CL. Good cam, with 3.91's will work well at the strip/street. The 3.91's CAN be changed when not running at the strip, RUN taller tires to raise effective gear ratio on those highway jaunts. Try to use a small single plane, or step to the Eddy Performer for good power. If you have good flowing heads run the Performer RPM. I know that the 4-throw is pretty self explanatory, run a carb (650-670 cfm for good snap thru the gears) with vac secondaries for econo/power. If not going with the MP cam, you might want to try Hughes Engines. Their hydraulic cams work very well and make torque/power. They are on the Internet. Food for thought!! Good luck with your 383!! It will run well!!
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596428
04/26/10 06:52 PM
04/26/10 06:52 PM
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HYPER8oSoNic
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Do your engine a favor, invest in a set of matching springs. 4speed + valve float (overrev) = dropped valve and (or) serious damage. It is not wise to invest in a cam without the proper springs.
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: P4120235 in a 383?
[Re: CurYellowBird]
#596429
04/26/10 07:10 PM
04/26/10 07:10 PM
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Joined: Nov 2009
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HYPER8oSoNic
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Quote:
I am going to mill the heads and what not to raise compression. I will be using the #'s matching 383 block from my car. It won't see a whole lot of drag time but I want the power to put the typical ricer in his place.
My only issue is knowing how the 4 speed works with all of this cause I have no experience on that side of the house. As I said before, I am probably going to do a gear swap. I have an 8 3/4 not a dana.
The 8 3/4" is a sturdy unit, very good alternative to the Dana. Lightweight, as compared to the Dana but just as strong to a point. For what you are doing, it will be MORE that adequate. The 4 throw is nearly bulletproof, but you will NEED to know how to SHIFT it with authority to be consistent. As far as the "ricers" are concerned with, word of caution - pick your fights (races) wisely. Just because a import has less cubes does not mean that they aren,t packing a HUGE PUNCH.
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: MP .474 or .484 in a 383?
[Re: RUNCHARGER]
#596431
05/12/10 02:47 AM
05/12/10 02:47 AM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
OP
mopar
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OP
mopar
Joined: Feb 2009
Posts: 583
San Antonio, TX
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Well here's a little update. My friend who was offering me the camshafts passed away roughly a little over a month ago from cancer. Hank Kruse was one bad a** car guy and acted like a kid in his 69' Charger RT/SE and died at the age of 69. I will really miss him, and the parts he left behind that I bought up are really going to help get my car together. And I have finally come up with what I believe is a reasonable combo.
I found an old man who is giving me a 69' HP 383 block for free and possibly a 400 later once he gets his son to bring it over. Either way the combo is going to remain the same.
*383 block standard bore or .030 over *KB400 pistons (-6cc dome) *452 heads with some port work and bowl blending *Factory Hi-po manifolds *Edelbrock RPM performer intake *Barry Grant 750cfm carb *4 speed, AC, manual disc brakes *3.91 gear with a 285/70/SR15 BFGoodrich tires * Shooting for 9.5:1 CR *Upgrade to electronic ignition
The only reason I'm sticking with my factory performance manifolds is due to clearance issues with the clutch linkages and power steering pump.
How detrimental are headers if the rest of the combo is there for the larger cam grinds? I am not going over .500 lift with my cam selection.
What are the main differences between the older and newer grind of the 284/.484? I know the LSA on the new grind is 114 compared to the 108 LSA on the older grind. How does this affect the motor in all aspects?
I'm really interested in the looks of Lunati's voodoo cams, particularly the 60302 and 60303. My goal out of this car is a fun, streetable car, limited strip, and plenty of torque to move the 4000lbs. Like to get a mid to low 13 the one or two times I take it to the quarter.
I had bought up Hank's old super stock springs, but thinking I'll just stick with the factory springs.
Thanks for the help and advice thus far guys. Still looking for opinions now that I have decided on a combination and goal.
Last edited by CurYellowBird; 05/12/10 02:49 AM.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596437
05/16/10 03:36 PM
05/16/10 03:36 PM
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Joined: Nov 2009
Posts: 2,275 Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
Well here's a little update. My friend who was offering me the camshafts passed away roughly a little over a month ago from cancer. Hank Kruse was one bad a** car guy and acted like a kid in his 69' Charger RT/SE and died at the age of 69. I will really miss him, and the parts he left behind that I bought up are really going to help get my car together. And I have finally come up with what I believe is a reasonable combo.
I found an old man who is giving me a 69' HP 383 block for free and possibly a 400 later once he gets his son to bring it over. Either way the combo is going to remain the same.
*383 block standard bore or .030 over *KB400 pistons (-6cc dome) *452 heads with some port work and bowl blending *Factory Hi-po manifolds *Edelbrock RPM performer intake *Barry Grant 750cfm carb *4 speed, AC, manual disc brakes *3.91 gear with a 285/70/SR15 BFGoodrich tires * Shooting for 9.5:1 CR *Upgrade to electronic ignition
The only reason I'm sticking with my factory performance manifolds is due to clearance issues with the clutch linkages and power steering pump.
How detrimental are headers if the rest of the combo is there for the larger cam grinds? I am not going over .500 lift with my cam selection.
What are the main differences between the older and newer grind of the 284/.484? I know the LSA on the new grind is 114 compared to the 108 LSA on the older grind. How does this affect the motor in all aspects?
I'm really interested in the looks of Lunati's voodoo cams, particularly the 60302 and 60303. My goal out of this car is a fun, streetable car, limited strip, and plenty of torque to move the 4000lbs. Like to get a mid to low 13 the one or two times I take it to the quarter.
I had bought up Hank's old super stock springs, but thinking I'll just stick with the factory springs.
Thanks for the help and advice thus far guys. Still looking for opinions now that I have decided on a combination and goal.
First of all my condolences to the family of the man that died. I too suffered losses in my family due to the dreaded disease. God bless. Now it sounds like you are getting closer to your goal. As far as telling the engine size 383 vs. 400 (.060 over 383), it could be stamped on the side of the block and/or a code is on the front pad near the distributor. Those are your telltales, and IF it is a 400, well a little arm lengthening CAN do a lot for low - midrange torque/power. Since it is basically a street ride, the magnum exhausts are more than adequate. 13 second rides DO work well with them as long as your engine tune is sharp. 3.91's can get you to low 13's, but the cam plays a BIG role with the 4000 lb car weight. You may or may not need lower the gear to 4.10-4.30 range. Pick the right cam and work on the ignition timing/jetting. It may be what you need without sacrificing the driveability and day to day manners of the car. The Voodoo cams are of a good design, just watch your lift with the stock heads, or you may have some machine work to do on the valve seats. The superstock springs, hold on to them!! Find out the Spring #'s and it will lead you to the rate of the spring. Your better approach is to use the current springs (unless they are really worn) and put a spring clamp kit just rearward of the front spring eye. Add a pinion snubber to the differential (nose) and it will lower your traction problems at the strip. Set pinion snubber about 1 - 2" from floorboard at strip, depending how hard you drive at strip. Not really needed on the cruising runs. The 114 degree cam basically gives a broader powerband and a smoother idle. The 108 degree cam gives a narrow but higher powerband and has more of a "rumpety - rump" type idle. Either one are good, it just depends on the engine design you have (compression, cam, carb, gears, vehicle weight, intended usage), You get the picture? Food for thought my friend.
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: MP .474 or .484 in a 383?
[Re: HYPER8oSoNic]
#596438
05/16/10 08:29 PM
05/16/10 08:29 PM
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Joined: Feb 2009
Posts: 583 San Antonio, TX
CurYellowBird
OP
mopar
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OP
mopar
Joined: Feb 2009
Posts: 583
San Antonio, TX
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Thanks for the condolences hypersonic.
I have both a 383 and 400 blocks now and figure they both look the same unless your a mopar nut and can identify the ID pads.
I might try headers, but I'm worried that I'm gonna buy a set of flowtechs or summits and will have to modify my clutch linkages.
As for the cam, my father doesn't agree with the 60303 lunati cam but really likes the look of the xe268 cam. So if he likes that one, then I think lunati's 60302 would be better choice with the setup I'm going for.
Last edited by CurYellowBird; 05/16/10 08:30 PM.
Project War Bird:
1971 Plymouth Roadrunner
383 4 speed with air conditioning
GY3 Curious yellow
All original
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Re: MP .474 or .484 in a 383?
[Re: CurYellowBird]
#596440
05/23/10 06:31 PM
05/23/10 06:31 PM
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Joined: Nov 2009
Posts: 2,275 Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
Thanks for the condolences hypersonic.
I have both a 383 and 400 blocks now and figure they both look the same unless your a mopar nut and can identify the ID pads.
I might try headers, but I'm worried that I'm gonna buy a set of flowtechs or summits and will have to modify my clutch linkages.
As for the cam, my father doesn't agree with the 60303 lunati cam but really likes the look of the xe268 cam. So if he likes that one, then I think lunati's 60302 would be better choice with the setup I'm going for.
As far as headers go, it is a better product/for more money world. You might get lucky on a set that fits with your clutch linkage. And it might be a little pricey. If you do, you might as well go with the coated headers (last longer). 383's and 400's are exactly the same in dimension, so if you decide to swap one for the other, no problems. Or if you want to go low buck go, with the Magnum 383 - 440 exhaust manifolds. They would clear your clutch linkage and work just as well as headers till 4500-5000 rpm. Then headers will take off in the power department after 5000 rpm. Its up to you on what you want to do. Resaerch your cam and BE HONEST about your engine's powerband. Too much can be more harmful, than good. Especially at the pump!!!
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: MP .474 or .484 in a 383?
[Re: HYPER8oSoNic]
#596441
05/31/10 01:58 PM
05/31/10 01:58 PM
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Joined: Nov 2009
Posts: 2,275 Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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The .474 cam is of a good design. Think about the Edelbrock 383 performer RPM. It is an overall improvement over the 383 Magnum (Roadrunner) intake. Gives the mill better breathing room after 4000+ rpm and better low end torque above 1500- 1800 rpm. It will compliment this cam well. Be sure to check your hood clearance, though.
Last edited by HYPER8oSoNic; 06/26/10 10:02 PM.
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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