gmctruck1976 Posted May 17, 2009 Report Posted May 17, 2009 Hello. need help figuring out the pilot jet not sure which way to adjust size. ive got a bad quarter throttle studder. Ive got the main and niddle on the money.... i think. It runs awsome half to to full throttle. but bogs just before the power hits on. its not bad but i notice it. i am trying to reduce the small just be for the power really kicks in. any one have a sugestion on pilot jet. i think ist a little rich. but could be wrong. Quote
AKheathen Posted May 17, 2009 Report Posted May 17, 2009 is it a stutter up-to quarter throttle, or at quarter throttle. if the pilot is too big, you'll notice it right from idle, and your airscrews won't adjust up right. if it's @ 1/4 throttle, then it's in the needle. from the top hesitation, i would double check the mains, and play with the neeedles some more, and remember, the needle will seem to work good in 3 different spots, and you get it set for 1/8 throttle on up, then set the pilot. Quote
robert0762 Posted May 17, 2009 Report Posted May 17, 2009 Not trying to steal ur thread but I get a studder when its rolling onto the pipe? Any suggI know my mains are rich320 at sea level but it does it at any throttle pos Quote
AKheathen Posted May 17, 2009 Report Posted May 17, 2009 Not trying to steal ur thread but I get a studder when its rolling onto the pipe? Any suggI know my mains are rich320 at sea level but it does it at any throttle pos your mains do affect 90% of the range, so get those dialed in first, then go from there. running stock reeds? Quote
lowbuckracing Posted May 17, 2009 Report Posted May 17, 2009 Not trying to steal ur thread but I get a studder when its rolling onto the pipe? Any suggI know my mains are rich320 at sea level but it does it at any throttle pos Stock stroke?porting?I ran 320s in a 4m dune port..so if its stock may be rich... Quote
gmctruck1976 Posted May 21, 2009 Author Report Posted May 21, 2009 well guys thamks for the advice. the jetting seems ok now. but ill see. had the top end apart was going to rebuild it till i found id bought the wrong pistons. what apain in the but. im just fliping the rings for now. seems to run a bit bett3er till they go for good. im sure it wont be long. i founfd i was running one cylender most the time. on low end. had a lot of blow by on the left side. well i recon i cnt complain even runing like that it still smoked a group of raptors. even some built ones on the strip Quote
AKheathen Posted May 21, 2009 Report Posted May 21, 2009 umm... i'd get on that rebuild asap. if they do finally "go" you'll endup spending 2-4 times as much. just my .02 Quote
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