[Caprimaniac]

Hmm. Ok; lots of folks telling 5/16 will be OK, so I'll stick with that. Even makes them couple of grams lighter.

Will set RPM limiter at 8000. But, since the "thing" is going on the dyno, I might put move it lower down on the scale then, depending, as you said earlier, on rpm at max HP.

In a discussion like this, "racing" is coming up often, yes. There are lots of various degrees of racing. Nascar, oval track, top fuel/ mod street drag (+canam, lemans series+++) are all serious "all out" constant maximum RPM racing. On the other hand we have grassroot oval/ street course racing, Historical classes, "GT-racer" (as seen on TV..) and other little more gentle & budget(?!) friendly "racing". Our racing are in the 2. category. We do not have the drivetrain nor the budget for an all out racing class- at this moment.

Is this making sense? Or is it like "if you make 8000 rpm at the end of that long staright in 10 laps in a row, you have to use 600 lbs springs"?