#1banshee Posted December 16, 2008 Report Posted December 16, 2008 (edited) Motor has a new crank with hot rods long rod kit on it wiseco pistons that are 1mm bigger bore port and polished cool heads with 19cc domes... I put the reeds in with the new intake.. I wanted to check the PSI in both cylinders.. I dont know how good this checker is i got it from a friend.. In both cylinders its reading about 144-146... I have the exhaust off and no carbs on it...I put about 4 bolts in to hold the intake and reeds in i kicked it over sevral times to get the psi up and once i got it there it wouldnt go any further... B4 i took it all apart to do shit it ran awesome no prob what so ever... I dont know how rad these people went with the porting could that be why its kinda low? Motor hasnt ran in about a month or month 1/2...I didnt do nothing to the motor internal... what do you guys think? too low on compression? Motor was just rebuilt also by the kid.. he gave me all the paper work of everything he had bought to do the rebuild.. Motor is about 8 months old or so not even??? Edited December 16, 2008 by #1banshee Quote
wacko2000 Posted December 17, 2008 Report Posted December 17, 2008 I believe at sea level with those domes you should be alittle higher. I know that at sea level with 21cc, i have about 155psi. You are fine, no need for a rebuild or anything though.. I think while its apart, you should take some pics of your porting.... Quote
#1banshee Posted December 17, 2008 Author Report Posted December 17, 2008 (edited) bump I did... Lemme post it.. http://www.bansheehq.com/forums/index.php?...c=104514&hl aout half way down is the port job. Edited December 17, 2008 by #1banshee Quote
spurdy Posted December 17, 2008 Report Posted December 17, 2008 bump I did... Lemme post it.. http://www.bansheehq.com/forums/index.php?...c=104514&hl aout half way down is the port job. The exhaust port timing can effect your compression as well. The higher the exhuast roof the lower your compression will be. What kind of port job did they have done to it? SP Quote
#1banshee Posted December 17, 2008 Author Report Posted December 17, 2008 The exhaust port timing can effect your compression as well. The higher the exhuast roof the lower your compression will be. What kind of port job did they have done to it? SP no clue my man... all he told me that he got it ported & polished by sand tech of navada or sum shit... No the port work i have no clue how radical it is.. Quote
Snopczynski Posted December 17, 2008 Report Posted December 17, 2008 To accurately check the compression, the motor needs to have been warmed up first, then check it immediately after. Quote
#1banshee Posted December 17, 2008 Author Report Posted December 17, 2008 To accurately check the compression, the motor needs to have been warmed up first, then check it immediately after. Ok kewl I will try that then... Motor should be running as soon as i get my parts from jeff. Quote
fastrthnu Posted December 17, 2008 Report Posted December 17, 2008 yea, put it together an warm it up and test with the pipes on and the carbs all the way open. The back preasure from the exaust and warm piston(piston expands with heat) should make better numbers. Quote
#1banshee Posted December 17, 2008 Author Report Posted December 17, 2008 (edited) yea, put it together an warm it up and test with the pipes on and the carbs all the way open. The back preasure from the exaust and warm piston(piston expands with heat) should make better numbers. I hope so thanks for all the anwsers.. Im sure it will be a little better Im hoping around the mid 160's alot better then the 146 area.. Edited December 17, 2008 by #1banshee Quote
wacko2000 Posted December 17, 2008 Report Posted December 17, 2008 SHUT UP YOUR HERB, you are not running a 2into1 carb... stop your BULLSHIT already.....lol.... Looks like a mx port...Looks exactly like my setup.. Quote
#1banshee Posted December 17, 2008 Author Report Posted December 17, 2008 SHUT UP YOUR HERB, you are not running a 2into1 carb...stop your BULLSHIT already.....lol.... Looks like a mx port...Looks exactly like my setup.. ahh kinda does.. let hope so.. Im running the 3into1 setup mother fucker!! lol sup my man!! The time is coming.. Jan 31st is coming quick will you be ready! Quote
Snopczynski Posted December 17, 2008 Report Posted December 17, 2008 No way of telling what the port is setup for without measuring the port heights and widths. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.