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[turbobike] CBR600F3 first dyno run soon

Dave Morrill (david.p.morrill@fairchildsemi.com)
Fri, 09 Apr 1999 09:01:02 -0400

Guys,
    I've got the CBR600 just about done and ready for my first dyno runs
on April 20th.  Just to remind you, I'm using a garrett t2, blowing
through the carbs.  I've got a popoff valve on the airbox and it seems
to be doing its job, if you let off the gas quickly you can feel the
boost being unloaded.  It was running way rich but I tracked this down
to too high fuel pressure, 3lbs was pushing the needles open and
dripping fuel, lowering it to 2 fixed it but I haven't really run it
since.  Before fixing this I did a burnout in my shop at about 1/3
throttle and it held 5lbs of boost at about 5-6000 rpm (showing full
rich on the O2 sensor).

    Anyway, I know the CV carbs are going to be pesky.  Anyone have some
specific suggestions on needles or spring sizes to start with?  Actually
any suggestions at all.  I will be running it around my house this
weekend and will post its behavior next week.  I also have boost, O2,
fuel pressure, and oil pressure (to the turbo) guages.  I'll be dynoing
at Starting Line in Waterville, Maine.  Anybody know these guys?

thanks,
    Dave.