Just a belated comment re modifying SU carbs.
For racing use ONLY, through-boring the carbs works well. This
means that you are going to be spending all your time at or above
5000rpm. Otherwise, do not through-bore as the car will have awful
driveability....at least it did on my car.
But with most of vizard mods plus throughboring, I could outpull
equivalent cars with a weber, so long as I did not let the revs drop.
I also used WD40 on the piston and no other oil. BG needle worked
best. Actually, if I was willing to screw with modifying the
needle, I could have improved low speed driveability as little...but
it was not that important.
Jim
jfuerstenberg@dcmdc.dla.mil or jfuerstenberg@zz-linkl.dcmdc.dla.mil
"Here's to our friends the good guys. And here's to our enemies, the
bad guys. And here's to the hope that we can tell the difference."
--Keith Laumer--
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