Need help on Jetting..

[hollisatp]

Well I thought I had it pretty good but I was definately lean.. Almost burned holes in the top of my pistons.. left side more then the right.. I think I was getting air in the boot. I was last at Glamis and it was about 80 out.. Any help apreciated.. I run 92 octaine..

[AKheathen]

well, i have pretty much the same setup without porting, and 290's showed at the lean limit @ 70* with probably a little more humidity on the bluff. i'd imagine you to be about 340's. check for airleaks- move the carbs around while you are checking, because they can glaze a but where the intake clamps, but might not leak untill hot. (been there, done that) put the new jet's in and do a plug chop. i say chop this time, because your timing could be causing detonation, even with proper jetting, and you have to look with a magnifying glass, for metal specs. the vapor could put the timing too high with the +4

[hollisatp]

well, i have pretty much the same setup without porting, and 290's showed at the lean limit @ 70* with probably a little more humidity on the bluff. i'd imagine you to be about 340's. check for airleaks- move the carbs around while you are checking, because they can glaze a but where the intake clamps, but might not leak untill hot. (been there, done that) put the new jet's in and do a plug chop. i say chop this time, because your timing could be causing detonation, even with proper jetting, and you have to look with a magnifying glass, for metal specs. the vapor could put the timing too high with the +4

VAPOR?? what do you mean by that?

I will check the boots for leaks.. I did a leak down test with good results.. while cold... Thanks for the info..

[AKheathen]

VAPOR?? what do you mean by that?

I will check the boots for leaks.. I did a leak down test with good results.. while cold... Thanks for the info..

i was reffering to the vapor cdi