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Any info on squish area?


SupraGlue

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<BLOCKQUOTE>quote:</font><HR>Originally posted by MR. EARS:

What is that Mark I've never heard that term before :confused:<HR></BLOCKQUOTE>

 

It's an area around the outside edge of the piston where it is closest to the head at TDC. Apparently, by keeping that clearance tight, it "squishes" the air/fuel mixture into the combustion chamber and reduces detonation.

 

I see it referred to a lot when people explain why NOT to use a thicker head gasket to reduce compression.

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the idea behind squish, as mark stated, is to reduce detonation. By getting the air/fuel away from the outside of the combustion chamber, preignition is sort of being eliminated, as there will not be 2 flame fronts. The spark will ignite the mixture, and then it burns completely.

Mark, polishing the top of the piston and combustion chamber is another VERY effective way to eliminate preignition.

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