Slickgib Posted July 16, 2007 Report Posted July 16, 2007 seams like i have less power after the cool head insatll.help need to be crazy Quote
jbooker82 Posted July 16, 2007 Report Posted July 16, 2007 did you make sure not to pinch any orings? That could cause a leaking compression. What is your compression before and after the install. Maybe the domes you got were actually bigger than the stock head. Causing the compression to be lower. Quote
Slickgib Posted July 16, 2007 Author Report Posted July 16, 2007 (edited) its at 135 both cylinders. i might have pinched one. i guess ill pull it all apart and check it out. maybe a smaller dome. i have 20cc domes. i should proabaly change out my plugs. Edited July 16, 2007 by Slickgib Quote
dajogejr Posted July 16, 2007 Report Posted July 16, 2007 At 135PSI with 20cc domes in cali...something isn't right. How old is that motor...? I would think 20cc domes on a good motor @ or near sea level would be 150ish...to 160ish. Is it a quality compression tester (not an auto parts store cheapy..) and did you keep on kicking it, with the throttle held WOT, until it stopped moving all together? Quote
Slickgib Posted July 16, 2007 Author Report Posted July 16, 2007 it a cheap compression tester the one you have to hold onto the daNG HOLE. and no i didnt hold the throttle open. ill test again ok i get 150 right on the button on both cylinders. how is that Quote
XxMeltIcexX Posted July 16, 2007 Report Posted July 16, 2007 it a cheap compression tester the one you have to hold onto the daNG HOLE. and no i didnt hold the throttle open. ill test againok i get 150 right on the button on both cylinders. how is that That sounds better, I donno how you were getting 135 without any throttle although.. Id get a better comp gauge, my cheapy Checker Auto gauge read the same as my buddys craftsman :thumbsup: Any way you put it, if its installed right and before your stock head wasn't milled (more compression like your cool head) then somethin else is wrong. Compession is a good base to start off of. Quote
Slickgib Posted July 16, 2007 Author Report Posted July 16, 2007 thanks man i think i throw some new plugs in it and runm it up and down the street a few times. Quote
dajogejr Posted July 16, 2007 Report Posted July 16, 2007 Yeah, 150 sounds more like it...should be a tad higher, but...should be ok. ALWAYS throw new plugs in whenever you do new mods....that's the only way to see where you're at... Quote
Slickgib Posted July 17, 2007 Author Report Posted July 17, 2007 ok i went and bought a differnent compression tester and this one says im at 122. this isnt good. i think i have to tear the cool head off and make sure all the o rings sealed what do you think? Quote
XxMeltIcexX Posted July 17, 2007 Report Posted July 17, 2007 ok i went and bought a differnent compression tester and this one says im at 122. this isnt good. i think i have to tear the cool head off and make sure all the o rings sealed what do you think? ya, make sure you tightened down the acorn nuts in sequence - 122 is normal if your running a stock head and about to need some new rings - take that head off and double check. Eric Quote
Slickgib Posted July 17, 2007 Author Report Posted July 17, 2007 i just bought this banshee and put a cool ehad on it and im getting like 128 135 psi with 20 cc domes and my motor has been bored over one time .. the piston says 25 on it.. help me and the cylinnders still have the hone marks looks new still and rings are good still i think so i go smaller domes? Quote
jbooker82 Posted July 17, 2007 Report Posted July 17, 2007 What kind / brand of compression tester did you buy? What does the tip look like. Are the threads long like the spark plugs or are they short? josh Quote
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