Chamber Size
Thread Starter
Racer
Joined: Oct 2001
Posts: 262
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From: Palos Hills IL
Chamber Size
If you had two engines both with 11.0 comp. One that had 64cc chamber heads and the other with 55cc chamber, is the one with the smaller chamber more prone to detonation? Each setup being 0 deck and a .040 quench.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
I've been otherwise occupied. The quench area is all important. Within your guidelines the, above piston volume has to remain the same. The question becomes, "Am I better off with a bigger combustion chamber head, or a piston with a larger dish?" I don't know that it is all that critical, but conventional wisdom says, stick with a flat top piston where ever possible. The dome of a domed piston can inhibit or block the flame front. I don't know that a dish poses problems other than possibly a weight penality. For an equal amount of money, I'd stick with a flat top piston.
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Drifting
Joined: Mar 2004
Posts: 1,443
Likes: 4
From: Grand Rapids Mi
CFI-EFI was wondering why a dish piston would impose a weight penalty?? Is this comparing dish to flat top?? Current trend seems to be avoid dome pistons if possible. I'm presuming it has to do with piston construction? Just trying to learn before spending $$$ Thanks
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Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by C-4 Now
CFI-EFI was wondering why a dish piston would impose a weight penalty?? Is this comparing dish to flat top??
Originally Posted by C-4 Now
Current trend seems to be avoid dome pistons if possible.
Doing this differently don't necessarily constitute a mistake, but it pays to pay attention to details.
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