squish clearances

Printable View

03-24-2007, 05:50 AM
BBMonte

squish clearances

how dus squish clearances affect compression and detonation?:whacked:
03-24-2007, 06:14 AM
R Pope

The idea behind squish is that it causes a violent "squirt" of air/fuel mix as the piston squeezes up to the head at TDC. This should improve mixing, combustion, and cooling of potential hot spots, allowing higher CR's. The only problem I have with the theory comes from my experience with old Hemi's, they have no squish area at all, and can run on much worse gas than anything else I ever saw and never detonate. Just one more case of the real world defying theory, I guess.
03-24-2007, 07:38 AM
techinspector1

Quote:

Originally Posted by R Pope

The idea behind squish is that it causes a violent "squirt" of air/fuel mix as the piston squeezes up to the head at TDC. This should improve mixing, combustion, and cooling of potential hot spots, allowing higher CR's. The only problem I have with the theory comes from my experience with old Hemi's, they have no squish area at all, and can run on much worse gas than anything else I ever saw and never detonate. Just one more case of the real world defying theory, I guess.

Probably because of the centrally located spark plug where all areas of the chamber were equidistant from the plug. That and a low surface to volume ratio which tended to eliminate cooler areas and lended itself to a complete burn. I'm just theorizing though. :LOL:
03-24-2007, 07:51 AM
BBMonte

Quote:

Originally Posted by techinspector1

Probably because of the centrally located spark plug where all areas of the chamber were equidistant from the plug. That and a low surface to volume ratio which tended to eliminate cooler areas and lended itself to a complete burn. I'm just theorizing though. :LOL:

i was thinking the same thing after i ran the post so i am going to be runing 9.5:1 how much is to much and how mush is to little?
03-24-2007, 03:49 PM
erik erikson

Quote:

Originally Posted by techinspector1

Probably because of the centrally located spark plug where all areas of the chamber were equidistant from the plug. That and a low surface to volume ratio which tended to eliminate cooler areas and lended itself to a complete burn. I'm just theorizing though. :LOL:

Richard,it is no theory.
What you said is 100% true I.M.O.