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[turbobike] turbo f3 backfire

Dave Morrill (david.p.morrill@fairchildsemi.com)
Tue, 20 Jul 1999 11:36:44 -0400 

Guys,
    Finally got the 600F3 put back together last night.  Based advice
from people here, I've raised the compression from the 8:1 I started
with to 10.5:1, and noticed a major increase in performance.  Also found
that the jerks I had degree my cams were way off.  Anyway, it revs a lot
faster and comes on boost much quicker.  It's driveable now, but not
perfect yet.

    I am still struggling with a lean backfire (I think) when I let off
the gas.  I am blowing through the stock CV carbs and am getting real
close on the mains and needles, but I still get a pretty mean pop
(usually just one bang) out the exhaust when I quickly let off the
gas.

    Anyone experience this, or have any suggestions on getting around
this?

thanks,
    Dave.