EFI Head Volume

[Kurek, Larry]

Guys,

Although this question is NOT EFI related, so I question why it is on this
list, the stock L98 iron heads are 64cc while the aluminum are 58.

I'd suggest for questions like this, in the future, post to an F-body or
other such related list...

TTYL!

Larry

> 
> The stock cast iron head is 58.5?  Whoa, I thought it would 
> have a bigger
> chamber than that.  Thanks for the info.
> 
> Also quench area is critical in preventing pre-ignition so he 
> would rather
> increase the combustion chamber volume than shim the head up. 
>  Thanks again.
> Mark
> -----Original Message-----
> From: Marc Piccioni <mpiccioni at attcanada.net>
> To: 'diy_efi at esl.eng.ohio-state.edu' <diy_efi at esl.eng.ohio-state.edu>
> Date: Sunday, April 04, 1999 9:46 AM
> Subject: RE: EFI Head Volume
> 
> 
> >The head cc's should be 58.5 if the heads have not been cut. 
> One possible
> >method (depending on how much boost he wants to run) is to 
> use Fel-Pro's
> >head save gasket shim, it adds ~0.040" in thickness which roughly
> >translates into ~ 0.8 -> 1.0 drop in C.R. This would save a 
> bunch of $$$ on
> >AL heads if that is what he would like to do.........
> >
> >/Marc
> >
> >----------
> >From: Mark Romans[SMTP:romans at pacbell.net]
> >Sent: April 4, 1999 12:45 AM
> >To: diy_efi at esl.eng.ohio-state.edu; EFI
> >Subject: EFI Head Volume
> >
> >I have a friend who has an 89 Firebird 5.7 w/tpi and a 
> Vortech and he has
> >the stock cast iron heads.  (No casting #) and we are trying 
> to determine
> >what the stock head combustion chamber volume is.  He wants to go to
> >aluminum heads and drop his compression to 8.0-8.5 to one 
> range.  Anyone
> >know what the stock cast iron L98 F-Body app combustion 
> chamber CC's are?
> >Thanks.  Mark
> >
> >
> >
> >
> >
>