WHICH HEADS WILL WORK BEST WITH A 6 PACK

Posted By: Craig61

WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 03:22 PM

Right now I have 452 heads. At first was thinking to get 906 better compresion and flow, I THINK ? Now I have heard about the new cast iron heads made by mopar perforamce same as 906 heads better flow and bolt right on. part number P5249114 sold at summit racing. Does anyone know anything about these heads? So of the three which one will improve the perforamce of my 1972 440 in a 1965 ply bel 2 ? also be the best heads to have with the new 6 pack thats in the car future? The 452 heads, 906 heads or the new MP P5249114 heads which one to get? love to hear people thoughts.

Attached picture 6745914-IMG_0302.JPG

Posted By: Mr.Yuck

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 03:41 PM

It depends on the rest of your build. Cam, compression, stall, gear. If you a running a stockish cam, factory converter and low gears, jsut keep what you have.

You do know that's $822.99 EACH not for the set. For that money you can get a set of much better E-heads or spend $900 on a set of 440-source heads.

Posted By: JohnRR

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 04:06 PM

You won't get better compression or flow out of the 906's unless they have been cut and ported , stock for stock there is little difference between the 2 . As far as the other head , it's alot of money for little gain , they are a STOCK replacement that were NHRA legal at one point to replce the 906 .

If you are going to get a new head do yourself a favor and buy a closed chamber head .

Posted By: jbc426

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 04:14 PM

I'd say get a set of Eddy's or 440 source heads that have been checked over and massaged by some of the shops recommended on here. That way you can add the weight savings of aluminum.

If you swap over to the aluminum intake, heads, water pump housing, and run tube headers, it all adds to performance and pretty significant weight savings. Throw in the proper cam for your combo and you could be looking at over 100 additional horsepower to boot.

Posted By: dogdays

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 05:19 PM

Ditto. For all practical purposes all 1968 and newer B/RB heads have the same chamber size and flow very close to each other. The 452s are better for home porting.

There is not one of the stock '68+ heads that can hold a candle to a set of Stealths or Edelbrocks. And the MP heads are scarcely better than the other cast iron heads, plus they are incredibly expensive.

R.

Posted By: moparmarks

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 07:19 PM

Quote:

Ditto. For all practical purposes all 1968 and newer B/RB heads have the same chamber size and flow very close to each other. The 452s are better for home porting.

There is not one of the stock '68+ heads that can hold a candle to a set of Stealths or Edelbrocks. And the MP heads are scarcely better than the other cast iron heads, plus they are incredibly expensive.

R.

Stage VI heads have a 78CC chamber compaired the the 84cc chamber on the eddy heads.

Posted By: dogdays

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 07:24 PM

The P5249114 head that he refers to is the Stage V cast iron head. The Stage VI is a whole 'nother animal.
R.

Posted By: Challenger 1

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 07:33 PM

I have 6 pak bolted a set of edlebrock aluminum heads, it make's plenty of power. I'll never buy another cast iron head for the rest of my life. No reason too.

Posted By: JohnRR

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/25/11 08:59 PM

Quote:

Quote:

Ditto. For all practical purposes all 1968 and newer B/RB heads have the same chamber size and flow very close to each other. The 452s are better for home porting.

There is not one of the stock '68+ heads that can hold a candle to a set of Stealths or Edelbrocks. And the MP heads are scarcely better than the other cast iron heads, plus they are incredibly expensive.

R.

Stage VI heads have a 78CC chamber compared the the 84cc chamber on the eddy heads.

On paper a stage6 is 78cc ...

Posted By: G_bob

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/26/11 03:19 AM

Quote:

I have 6 pak bolted a set of edlebrock aluminum heads, it make's plenty of power. I'll never buy another cast iron head for the rest of my life. No reason too.

Same here. I have eddy rpm heads on the 440 in the challenger. 10.1:1 with trw sixpack pistons, 484 mp cam. Edelbrock sixpack manifold.
Much stronger than it was with the 902 heads and 770 vac sec carb that was on it before and all I did was swap the heads, intake and carb(s).

It went 13.19 @ 108.4 with a 2.10 60' with the iron heads and 4bbl. Haven't run it down a track with the sixpack, but it's much stronger now per my butt dyno.

Posted By: moparmarks

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/26/11 03:30 AM

Quote:

On paper a stage6 is 78cc ...

Yes John, on paper but sitting side by side to Eddys it has a much smaller heart shaped chamber.

Posted By: moparmarks

Re: WHICH HEADS WILL WORK BEST WITH A 6 PACK - 07/26/11 03:40 AM

Back to OP.
The 452 are the best factory iron open chamber head. Has about the same chamber as the over rated 906 but has a flatter floor on the intake runners and larger cooling ports than the 906's.

Aluminum heads allow 10.5 C/R on todays pump and compression is power.