Mopar heads

treessavoy · 03-05-2009, 03:06 PM

This pertains to IHRA Stock calss. Can I run the '67 915 heads on my '64 426 street wedge (365hp) or am I restricted to the original 516 head?

Looking at the figures it seems the car will fall into G/SA but not sure. The car is a '64 Plymouth Savoy 2dr sedan and I believe the engine has been factored down.

Any help would be appreciated.

Jim

Shawn Blair · 03-06-2009, 01:50 AM

I don't know about IHRA but they are legal in NHRA with a 1.60 exhaust valve. Shawn

treessavoy · 03-06-2009, 02:56 AM

Quote:

Originally Posted by Shawn Blair

I don't know about IHRA but they are legal in NHRA with a 1.60 exhaust valve. Shawn

Thanks Shawn,

I thought they were legal but wasn't sure.

Jim

treessavoy · 03-25-2009, 11:38 PM

Quote:

Originally Posted by Shawn Blair

I don't know about IHRA but they are legal in NHRA with a 1.60 exhaust valve. Shawn

The problem is that they come with a 1.74 exhaust, can I put new seats in them so I can use the smaller 1.60's?

RJ · 03-26-2009, 05:22 AM

Quote:

Originally Posted by treessavoy

The problem is that they come with a 1.74 exhaust, can I put new seats in them so I can use the smaller 1.60's?

Yes

Shawn Blair · 03-28-2009, 10:59 AM

That's correct! .......Shawn

Paul Precht · 03-31-2009, 08:47 PM

Original 915 heads with 1.60 exaust are easier to find and cheaper than the 1.74 versions. I found info on the NHRA spec sheets that allow the 915 heads on 65 and 66 cars but I can't find it for anything earlier. It would be nice if you could use them on the 62 361/305, the intake port is identical to the 906 head which is light years ahead of the 516, Paul.

treessavoy · 04-01-2009, 01:15 PM

Quote:

Originally Posted by Paul Precht

Original 915 heads with 1.60 exaust are easier to find and cheaper than the 1.74 versions. I found info on the NHRA spec sheets that allow the 915 heads on 65 and 66 cars but I can't find it for anything earlier. It would be nice if you could use them on the 62 361/305, the intake port is identical to the 906 head which is light years ahead of the 516, Paul.

Paul,

there are several early engine combo's that could benefit with the 915's, 62 383 motors, 62 413's (less max wedge), 63 & 64 383's, and I believe it would make the 64 426s motor competitive.....516's are not viable, too restrictive.

Bob Pagano · 04-01-2009, 01:55 PM

I have a question, what head dose a stage 3 run now ? 518 heads were hard to find in the 70s. Now I would think they are gold ! Is there a mopar replacement acceptable now?

Mopar Steve · 04-01-2009, 04:00 PM

Quote:

Originally Posted by Bob Pagano

I have a question, what head dose a stage 3 run now ? 518 heads were hard to find in the 70s. Now I would think they are gold ! Is there a mopar replacement acceptable now?

The originals are like gold, lol! Mopar does make an acceptable replacement though.

03-05-2009, 03:06 PM	#1
treessavoy VIP Member Join Date: Feb 2009 Location: Dunnellon,FL Posts: 1,103 Likes: 0 Liked 4 Times in 4 Posts	Mopar heads This pertains to IHRA Stock calss. Can I run the '67 915 heads on my '64 426 street wedge (365hp) or am I restricted to the original 516 head? Looking at the figures it seems the car will fall into G/SA but not sure. The car is a '64 Plymouth Savoy 2dr sedan and I believe the engine has been factored down. Any help would be appreciated. Jim

03-06-2009, 01:50 AM	#2
Shawn Blair Member Join Date: Dec 2007 Location: Everson, WA. Posts: 122 Likes: 1 Liked 0 Times in 0 Posts	Re: Mopar heads I don't know about IHRA but they are legal in NHRA with a 1.60 exhaust valve. Shawn __________________ Shawn Blair 6383 SS 634 STK

03-28-2009, 10:59 AM	#6
Shawn Blair Member Join Date: Dec 2007 Location: Everson, WA. Posts: 122 Likes: 1 Liked 0 Times in 0 Posts	Re: Mopar heads That's correct! .......Shawn __________________ Shawn Blair 6383 SS 634 STK

03-31-2009, 08:47 PM	#7
Paul Precht Senior Member Join Date: Dec 2001 Location: Elysburg, Pa Posts: 690 Likes: 281 Liked 224 Times in 89 Posts	Re: Mopar heads Original 915 heads with 1.60 exaust are easier to find and cheaper than the 1.74 versions. I found info on the NHRA spec sheets that allow the 915 heads on 65 and 66 cars but I can't find it for anything earlier. It would be nice if you could use them on the 62 361/305, the intake port is identical to the 906 head which is light years ahead of the 516, Paul.

04-01-2009, 01:55 PM	#9
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 212 Liked 16 Times in 11 Posts	Re: Mopar heads I have a question, what head dose a stage 3 run now ? 518 heads were hard to find in the 70s. Now I would think they are gold ! Is there a mopar replacement acceptable now? __________________ Bob Pagano A/SA