EFI Head Volume

[Shannen Durphey]

I thought the aluminum vette heads and the early powerpack heads were
the only ones with chambers that small.
Any others?
Shannen

Mark Romans wrote:
> 
> 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
> >
> >
> >
> >
> >