87_shee Posted October 14, 2008 Report Share Posted October 14, 2008 What should my squish be set at with 65mm wisecos and 20cc domes? Thanks Quote Link to comment Share on other sites More sharing options...
sinisterboo Posted October 14, 2008 Report Share Posted October 14, 2008 that is something you have to measure, as each setup is different. Im sure someone on here may be able to give you a estimate, but just like jetting, til ya check it, ya dont know.... Quote Link to comment Share on other sites More sharing options...
J-Madd Posted October 14, 2008 Report Share Posted October 14, 2008 You can't tell without checking it. Depends on how the domes are cut and base gasket thickness. Not sure cc has anything to do with the squish. Most run 0.035'' - 0.045''. Quote Link to comment Share on other sites More sharing options...
87_shee Posted October 14, 2008 Author Report Share Posted October 14, 2008 Ok sorry i guess i worded that wrong. I wanted to know what i should be looking for when i measure it. I know how to do it, just looking to for a number to compare to when i do meausre it. I have a few different size base gaskets cause I want to make sure its all good. So 0.035'' - 0.045'' is what i should be looking for, correct? Quote Link to comment Share on other sites More sharing options...
bbcmudtruck Posted October 15, 2008 Report Share Posted October 15, 2008 I have had a few different builders tell me to shoot for .045. Quote Link to comment Share on other sites More sharing options...
J-Madd Posted October 15, 2008 Report Share Posted October 15, 2008 I have had a few different builders tell me to shoot for .045. TABLE 2.1 Minimum squish clearances Cylinder size (cc) Clearance (mm) 50-80 0.6-0.8 100-125 0.7-0.9 175-250 1.0-1.4 300-500 1.1-1.5 If this is correct, it should be 0.040'' - 0.055''. Squish on most of my engines is 0.045'' The0.035 that I stated before may be a little tight. Quote Link to comment Share on other sites More sharing options...
trex banshee Posted October 15, 2008 Report Share Posted October 15, 2008 thats what i was told...not to go any tighter than .040" My trex is .0415" and my 350 is .049" Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted October 15, 2008 Report Share Posted October 15, 2008 actual squish you need to setup at is going to depend on the rpm the motor will achieve. Quote Link to comment Share on other sites More sharing options...
magz Posted October 15, 2008 Report Share Posted October 15, 2008 actual squish you need to setup at is going to depend on the rpm the motor will achieve. i just got my motors back together and done with break in and im running .047 and it runs like a raped ape Quote Link to comment Share on other sites More sharing options...
deckheight Posted October 15, 2008 Report Share Posted October 15, 2008 Yepper... That's what I was going to say, beat me to it... i just got my motors back together and done with break in and im running .047 and it runs like a raped ape Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted October 15, 2008 Report Share Posted October 15, 2008 Yepper... That's what I was going to say, beat me to it... With T5's and a dune port (or slightly raised exhaust port) I would be running .050"-.055" Thats roughly gonna be for a 9,500-10,000 rpm motor. Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted October 15, 2008 Report Share Posted October 15, 2008 Hey Snop. What does Rpm have in relationship with the squish? I know a bunch of motor stuff but the squish thing is still a little forgein to me. I get that the squish is the space between the piston and the head but how doesn RPM effect what you should run. Quote Link to comment Share on other sites More sharing options...
trex banshee Posted October 15, 2008 Report Share Posted October 15, 2008 Hey Snop. What does Rpm have in relationship with the squish? I know a bunch of motor stuff but the squish thing is still a little forgein to me. I get that the squish is the space between the piston and the head but how doesn RPM effect what you should run. Snopczynski can chime in and correct me if im wrong but what i believe he is getting at is a tighter squish will create higher pressures and not allow the engine to rev quite as easy or as much...but then again that kinda contradicts the fact that he runs .050"-.055" on a dune port to rev 9500 to 10000 and my bike is just over .041" and i know it revs that hard, so honestly i don't know! :biggrin: I would like to hear his take on this too cause my bike with .041" squish is only about 145psi due to the dome size/shape...so me saying the tighter squish will make higher pressures isn't always true. Im confused too Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted October 15, 2008 Report Share Posted October 15, 2008 The higher the rpm motor, the more stuff stretches out in lenght. Therefore, if you have a high rpm motor with .045" squish, the piston can smack the head. You dont want to go to far though, then the flame front wont burn even and cause the bike to run like pooh. Quote Link to comment Share on other sites More sharing options...
bellracing2 Posted October 15, 2008 Report Share Posted October 15, 2008 what is the min squish I should be running on a stock motor with dynoport 2 into 1 pipe for 93 octane ? Quote Link to comment Share on other sites More sharing options...
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