vortec heads

[Eric Bryant]

> From: Bruce Plecan [mailto:nacelp at bright.net]
> Subject: Re: vortec heads
> 
> Your correct on all counts.
> far better to use a dished piston, to even further min the 
> squish area, CR
> permitting.   You want to get the greatest volume of gas as 
> close to the
> plug as possible.

I'm not sure what the Vortec pickup motors use, but the LT1 and LT4 use
flat-top pistons to create the correct squish area.  The tech notes that
come with the Fast Burn heads state that they should also be used with
flat-tops for the same reason.  I think they're doing that to accomplish the
same goals that you speak of (creating a uniform combustion chamber shape
that's centered around the plug).  I don't think that dished pistons would
screw that up, but you'd lose compression ratio (and one of the nice things
about the "modern" combustion chamber shapes is the ability to run a higher
CR).

Eric Bryant
mailto:bryante at ghsp.com
http://www.novagate.com/~bryante 
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