cbn70 Posted June 11, 2007 Report Share Posted June 11, 2007 Just courious on what the proper squish clearance I should have on my engine? I have about .030-.035. I think it is ok but I thought I would check with some of you guys before I button it up and run it. thanks Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted June 11, 2007 Report Share Posted June 11, 2007 Ideally .040"-.065"! Are you running a cool head? Quote Link to comment Share on other sites More sharing options...
cbn70 Posted June 11, 2007 Author Report Share Posted June 11, 2007 no, not a cool head, just the stocker that has been re chambered, when the porting was done. Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted June 12, 2007 Report Share Posted June 12, 2007 you can see if you can find a little thicker head gasket to put on it. Quote Link to comment Share on other sites More sharing options...
bigboybanshee Posted June 12, 2007 Report Share Posted June 12, 2007 you can see if you can find a little thicker head gasket to put on it. I agree. .030-.035 is pushing it. What was the exact number you got when you checked it? Mine is at .039 Quote Link to comment Share on other sites More sharing options...
cbn70 Posted June 12, 2007 Author Report Share Posted June 12, 2007 I got .032 exactly Quote Link to comment Share on other sites More sharing options...
blowit Posted June 12, 2007 Report Share Posted June 12, 2007 Just courious on what the proper squish clearance I should have on my engine? I have about .030-.035. I think it is ok but I thought I would check with some of you guys before I button it up and run it. thanks You are all good. Run it!! We have cut too many to count. A stock banshee motor generally will be fine at .020 or more but .020 is pretty tight. .030-.035 is fine. Brandon Quote Link to comment Share on other sites More sharing options...
cbn70 Posted June 12, 2007 Author Report Share Posted June 12, 2007 You have cut a lot of banshee heads? And this is what you cut the squish to ??? Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted June 12, 2007 Report Share Posted June 12, 2007 My motor guy didn't recommend that tight of squish, thats all I am saying. Quote Link to comment Share on other sites More sharing options...
blowit Posted June 12, 2007 Report Share Posted June 12, 2007 You have cut a lot of banshee heads? And this is what you cut the squish to ??? Our squish depends greatly on several factors but yes, we have cut hundreds of banshee heads and many were in your .030-.035 area. Check your compression though. Brandon Quote Link to comment Share on other sites More sharing options...
cbn70 Posted June 12, 2007 Author Report Share Posted June 12, 2007 Yes will check it when I get it into the quad. The motor is supposed to be set up to run a 50/50 mix of premium and 110 octane. This must be why is setup tight. Thinking it should be around 160-180???? That is just a guess though Quote Link to comment Share on other sites More sharing options...
ClimbAnyHill Posted June 17, 2007 Report Share Posted June 17, 2007 Our squish depends greatly on several factors but yes, we have cut hundreds of banshee heads and many were in your .030-.035 area. Check your compression though. Brandon How does compression effect squish? Quote Link to comment Share on other sites More sharing options...
blowit Posted June 18, 2007 Report Share Posted June 18, 2007 How does compression effect squish? The static compression and squish are not related. Static compression numbers are based solely from the comparison of two volumes. The squish is irrelevant in comp testing. Squish numbers refer to running compression and and final squish velocities that must be calculated. Generally speaking though, the reason I said to check comp is because as you mill a head or cylinder to reduce squish clearance, you are also reducing chamber volumes. You can absolutely have a head with .020 squish clearance and still only make 100psi static compression. Both measurements must be referenced. Brandon Quote Link to comment Share on other sites More sharing options...
alcoholbanshee Posted June 18, 2007 Report Share Posted June 18, 2007 You are all good. Run it!! We have cut too many to count. A stock banshee motor generally will be fine at .020 or more but .020 is pretty tight. .030-.035 is fine. Brandon .020 are you kidding me???????????????? That is way to tight. I really don't care how you setup your own engine, But please do not recommend this recipe for disaster to others!!!!!!!!! I cannot stress enough that .020 is way to tight!!!!!!!! Optimum would be right at .040 up to around .058 or so. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted June 18, 2007 Report Share Posted June 18, 2007 .040 - .058 seems excessive. why so large? .035 is optimum for wedge style heads what is the difference for the banshee? It has a radius crown to the piston and a "hemi" type combustion chamber. Why the extra clearance? I am building my first stroker when i get home and i am interested in this thread for my 4mm motor. I was going to shoot for Zero deck height and a .035 quench (squish as you are calling it) Quote Link to comment Share on other sites More sharing options...
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