Speier Racing Heads v.LS1

Cylinder Head and Manifold Discussion

Speier Racing Heads v.LS1

Postby Chad Speier » Wed Dec 19, 2012 8:25 am

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Re: Speier Racing Heads v.LS1

Postby boneil » Wed Dec 19, 2012 3:53 pm

I would thought it would have doe much better @ .600" lift.
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Re: Speier Racing Heads v.LS1

Postby Chad Speier » Wed Dec 19, 2012 6:33 pm

Compared to what? It's up 60cfm from as-cast.
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Re: Speier Racing Heads v.LS1

Postby boneil » Thu Dec 20, 2012 3:55 pm

Compared to most other 23 degree heads you have ported.
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Re: Speier Racing Heads v.LS1

Postby Orr89rocz » Thu Dec 20, 2012 7:24 pm

I never see other aftermarket cnc ported ls heads flowed to over .600-.700. Good to see that one all the way to 1" and still increasing. Good balanced port. Any plans for 243 LS2/LS6 castings?
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Re: Speier Racing Heads v.LS1

Postby 3rdgenls » Sat Feb 02, 2013 10:15 pm

chad,
what's the intake and exhaust runner volume, combustion chamber cc, and is this intended for stock cube ls1 or larger.

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Re: Speier Racing Heads v.LS1

Postby Chad Speier » Fri Feb 08, 2013 8:00 am

I never cc's it, but I will. The intended purpose is stock cube LS1.
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Re: Speier Racing Heads v.LS1

Postby 3rdgenls » Sun Feb 10, 2013 7:31 pm

Sounds good, I will be sending my heads your way soon.

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Re: Speier Racing Heads v.LS1

Postby Adger Smith » Mon Sep 16, 2013 11:43 pm

The legal head castings for a NHRA SS class I have a customer interested in are 806,853,339,241
I'm not sure which casting # has the best chamber.
The NHRA # for min chamber CC is 64.9
The largest NHRA intake runner CC is 210
The NHRA Ex CC is 80
All the listed heads carry these numbers.
Is your program any where near that?
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Re: Speier Racing Heads v.LS1

Postby Chad Speier » Fri Sep 20, 2013 7:51 am

Adger Smith wrote:The legal head castings for a NHRA SS class I have a customer interested in are 806,853,339,241
I'm not sure which casting # has the best chamber.
The NHRA # for min chamber CC is 64.9
The largest NHRA intake runner CC is 210
The NHRA Ex CC is 80
All the listed heads carry these numbers.
Is your program any where near that?


This program was done on a 241 casting. Also have a program for the 6.0L core.

I will need to cc it, I never have.
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