Jetting question

[Fordtech]

Ok guys......I have a Dynojet kit. 99 B-12. Yosh slip-on(street not race).
Instructions are the same for stage 1 and 3. Thing is......I have holeshot cams and ignition advancer.
I would like to retain stock air box, yes the silencer is removed. Question is, been running the 104 Dynojet mains,
but wonder is maybe a bit lean. I have not felt any accel problems for the most part....but DJ instructions say to run 104, 150, or 155's.......I am near sea level here........
Any takers???? I am thinking the 150's personally.....

[gyrogearcrunch]

Ok guys......I have a Dynojet kit. 99 B-12. Yosh slip-on(street not race).
Instructions are the same for stage 1 and 3. Thing is......I have holeshot cams and ignition advancer.
I would like to retain stock air box, yes the silencer is removed. Question is, been running the 104 Dynojet mains,
but wonder is maybe a bit lean. I have not felt any accel problems for the most part....but DJ instructions say to run 104, 150, or 155's.......I am near sea level here........
Any takers???? I am thinking the 150's personally.....

You shouldn't deal with this problem without making measurements. In this case, measure the fuel/air ratio to see where you are before making additional changes. 13:1 - 14:1 ratios are what you should be seeing across the rpm band on a dyno run, with the lower ratios at the high end of the RPM band. If you're dragging or running fuel, see Smokey Yunick.