I have an 03 banshee and i just put a coolhead on it, so i was checking my compression in the procees. i have 110 ft/lbs out of each cylinder, how do i know when to rebuild, i thought that seemed a little low, but it seems to run great.. any help is appreciated thx guys

mini

 

110 is kinda low... regardless of elevation. Did you hold the throttle wide open w/ the key off and run switch on??? Do a search on the internet and check your elevation... which domes did you go with?? BTW its PSI no ft/lbs.


Mike

 

ohh yea, i did know that, my bad, but i went with 20 cc domes, and it bumped me to 135 psi. i think that is low, but i don't wanna rebuild untill next winter, its parked for the winter now so i am just doing alll of the maintnence stuff, and yes that is how i checked it. i checked it on a cold day on a cold engine tho, i don't know if that has anything to do with it

mini

 

and now that i have the cool head and i have like 130psi how low do i let it go b4 i rebuild. i don't race or anything, but i don't want to loose any performance?? thx

mini

 

The lowest compression you can have w/ 20cc domes is 127 at 5000ft elevation... highest is 169 at sea level. It all depends on your elevation.. you could be cherry, usually when compression varies 10psi between cylinders its rebuild time or when the comp. gets below 100. Stock compression at sea level is 130..stock at 5000ft is 100. ELEVATION IS THE KEY!! Look up your elevation on the net and as long as your above 2000ft you havn't lost one point of PSI.


Mike