Thread: a question an the squish

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i've heard several peaple speaking of the squish area. know correct me please if i'm wrong and i'm sure i am but tossing the piston farther up the bore would in my mind increase the compression and isn't compression a low octane nightmare? i guess i fell off the wagon somewhere someone please throw me back on.

Originally posted by techinspector1
I don't know if I'm correct or not, but I use the words squish and quench interchangably.

Quench and squish are different. Squish is the area that isn't quenching, if that makes any sense to you. A tight fitting dome filling a combustion chamber with the same clearance everywhere would be a total quench chamber. Any thing else would have a squish area. I guess another way to look at it would be to consider squish the lowest pressure area in the chamber as the piston is moving towards TDC.

Aside from affording a more homogeneous mixture to the plug the quench area in the cylinder also cools the mixture a little bit as it gets close to some water.

Another example of "Quench" would be EGR.

Hope this helps.


j*b