Quench area?????? Dumb question.
 

I'm new to this quench area stuff. In the past everything I've built(really gotten into) has had a hemi or a dished piston. So the idea of quench didn't come up.. My head has a rectangular area (combustion chamber) the rest is flat. The piston has a dome in the center. with flats on either side.
With no head gasket the flat area of the piston hits the flat area of the head. The flat area of the piston is 0.010 above the deck. I'm running an aluminum rod that the manufacturer says to have at least 0.050 piston to head.
By using a 0.074 head gasket. I should have 0.064 piston to head. Correct so far?
Now where does the quench area theory.come in If I use a thinner gasket I'm afraid of collisions.
I think the basic idea of the quench area is to keep the force(after combustion) on the piston, not on cylinder walls etc. Is this right
The next gasket increment I can go to is .120 thick. Thats from cometic.
I've had somewhat of a breakdown in communications (he wanted me to just put it together and not worry, 16+ to 1 comp, and 0.020 piston to valve) with the guy the did the machine work and supplied the pieces. So I get no help there. I realize that the OHC motors are different. But I can't see them that different.

Re: Quench area?????? Dumb question.
 

I'm no engine guy so I'll tell you more than I know. I was under the impression that the quench area promoted turbulence in the cylinder on the compression stroke and the turbulence was beneficial to the combustion process... i.e., more complete burn and more resistance to detonation. I have read a couple of articles on how close the piston has to come to the head for the quench concept to be effective, but I seem to recall that the spacing should be less than 0.040" or so. I think you can order custom thickness gaskets from Cometic, but I would wonder if going from 0.064" to 0.050" would be worth the trouble.

Good luck

Re: Quench area?????? Dumb question.
 

Art,
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