wreckless1

cool . thats what im gonna try . thanks everyone for your info . greatly appreciated .

i think im around 450 in north kentucky , jeff suggested 320s then drop to 310s and go from there. It would smoke even after it warmed up, so im running 280s now only because thats the jets that my builder said would be right along with my friends that ride banshees . to lean im thinking . does the needle setting have anything to do with the pop or just the mains? i have the needle on the 2nd from top if that matters . but i have to say even with the pop every now and then , its nasty from mid to top . FAST really done these cylinders up right. now just getting it dialed in ..

ok ill check them if there fine ill back the timing to 4 . the thing is that it doesnt happen every time . ill bring it off in 2nd and as soon as i let out after wot it lets out a quick pop . thanks for the help .

4 mill play/dune port by FAST, 7 degree timing 280 main jets and whatever stock pilots are toomey t5s and pay check after pay check of evreything else.thanks

can someone tell me whats causing backfire soon as i go to let off throttle ? just put together a 4 mill and this is my only issue so far. thanks for any help i can get.