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Re: MP .474 or .484 in a 383? [Re: GTX MATT] #596422
01/29/10 09:22 AM
01/29/10 09:22 AM
Joined: Mar 2005
Posts: 3,138
Central NC
gch Offline
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Central NC
I would run the .474 between the two.It has better idle and low rpm manners.It pulls to the same rpm as the .484 and the torque/power willcome on sooner.They both are a little soft on the low end but that'sok with street tires and you can clutch it at whatever rpm you want.
I ran one in a 440 with 3.55 gears and stock everything else except headers and loved it.

Re: MP .474 or .484 in a 383? [Re: gch] #596423
01/29/10 11:38 AM
01/29/10 11:38 AM
Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird Offline OP
mopar
CurYellowBird  Offline OP
mopar

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Posts: 583
San Antonio, TX
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
Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596424
01/29/10 12:07 PM
01/29/10 12:07 PM
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
for what you want, I'd suggest the Summit 488 cam. If you have a catalog they are $89, $109 online. That's with lifters. I don't you'll see any perforamce gain with the more expensive cam.

Re: MP .474 or .484 in a 383? [Re: Mr.Yuck] #596425
01/29/10 12:13 PM
01/29/10 12:13 PM
Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird Offline OP
mopar
CurYellowBird  Offline OP
mopar

Joined: Feb 2009
Posts: 583
San Antonio, TX
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
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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Posts: 2,275
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HYPER8oSoNic Offline
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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)
Re: MP .474 or .484 in a 383? [Re: patrick] #596427
02/08/10 03:32 PM
02/08/10 03:32 PM
Joined: May 2005
Posts: 416
Franklin Co. Illinois
runinonmt Offline
mopar
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Joined: May 2005
Posts: 416
Franklin Co. Illinois
Quote:

I'd go lunati voodoo 60302, comp XE268 or lunati voodoo 60303 with comp #911 springs.




The 268 works great in the Stepson's 383 RR.Very streetable.274 shouldn't be too much trouble in a 4 speed car.
Ron


In sixty-five I was seventeen and running up one-o-one I don't know where I'm running now, I'm just running on Jackson Browne-Running On Empty
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 Offline
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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)
Re: P4120235 in a 383? [Re: CurYellowBird] #596429
04/26/10 07:10 PM
04/26/10 07:10 PM
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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)
Re: MP .474 or .484 in a 383? [Re: runinonmt] #596430
04/26/10 09:21 PM
04/26/10 09:21 PM
Joined: Jan 2003
Posts: 15,976
Chilliwack B.C. Canada
R
RUNCHARGER Offline
I Live Here
RUNCHARGER  Offline
I Live Here
R

Joined: Jan 2003
Posts: 15,976
Chilliwack B.C. Canada
I ran that .474 MP in the 383 in my CHallenger and it didn't put out the power I expected and I had to fiddle with the carb and distributor and it still didn't idle well. I put a 268 COmp in the 383 in my 70 Truck 383 and it works way better, better power and driveability as well.

Sheldon

Re: MP .474 or .484 in a 383? [Re: RUNCHARGER] #596431
05/12/10 02:47 AM
05/12/10 02:47 AM
Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird Offline OP
mopar
CurYellowBird  Offline OP
mopar

Joined: Feb 2009
Posts: 583
San Antonio, TX
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
Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596432
05/12/10 06:50 PM
05/12/10 06:50 PM
Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird Offline OP
mopar
CurYellowBird  Offline OP
mopar

Joined: Feb 2009
Posts: 583
San Antonio, TX


Project War Bird: 1971 Plymouth Roadrunner 383 4 speed with air conditioning GY3 Curious yellow All original
Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596433
05/12/10 06:58 PM
05/12/10 06:58 PM
Joined: Nov 2008
Posts: 1,565
tennessee
P
pushbutton Offline
pro stock
pushbutton  Offline
pro stock
P

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Posts: 1,565
tennessee
Quote:





Comp XE-268

Re: MP .474 or .484 in a 383? [Re: pushbutton] #596434
05/12/10 07:02 PM
05/12/10 07:02 PM
Joined: Nov 2004
Posts: 843
Suffolk,VA
I
ireland383 Offline
super stock
ireland383  Offline
super stock
I

Joined: Nov 2004
Posts: 843
Suffolk,VA
I second the XE268, or the 275DEH

Re: MP .474 or .484 in a 383? [Re: ireland383] #596435
05/12/10 07:24 PM
05/12/10 07:24 PM
Joined: Dec 2005
Posts: 303
Portland, OR
B
Banzaiii67 Offline
enthusiast
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enthusiast
B

Joined: Dec 2005
Posts: 303
Portland, OR
I think i've got a comp XE268H cam that was installed but never ran, pm me if your interested.

Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596436
05/12/10 09:18 PM
05/12/10 09:18 PM
Joined: Feb 2005
Posts: 4,311
Prospect, PA
BSB67 Offline
master
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Posts: 4,311
Prospect, PA
If you're trying to get max performance with the manifolds, call Dwyane or Mr. Six Pack and have him spec a custom grind for you

Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596437
05/16/10 03:36 PM
05/16/10 03:36 PM
Joined: Nov 2009
Posts: 2,275
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HYPER8oSoNic Offline
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HYPER8oSoNic  Offline
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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)
Re: MP .474 or .484 in a 383? [Re: HYPER8oSoNic] #596438
05/16/10 08:29 PM
05/16/10 08:29 PM
Joined: Feb 2009
Posts: 583
San Antonio, TX
CurYellowBird Offline OP
mopar
CurYellowBird  Offline OP
mopar

Joined: Feb 2009
Posts: 583
San Antonio, TX
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
Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596439
05/21/10 07:58 AM
05/21/10 07:58 AM
Joined: May 2010
Posts: 29
Tennessee
B
Bunk Offline
member
Bunk  Offline
member
B

Joined: May 2010
Posts: 29
Tennessee
I will pass along some great advice that I received from Hensley Racing here in Tennessee. When undecided between two cams, always go with the smaller of the two. This advice worked well for me!

Re: MP .474 or .484 in a 383? [Re: CurYellowBird] #596440
05/23/10 06:31 PM
05/23/10 06:31 PM
Joined: Nov 2009
Posts: 2,275
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HYPER8oSoNic Offline
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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)
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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Posts: 2,275
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HYPER8oSoNic Offline
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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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