>>>I am sending
>>>the crank out to have the counterweights shaved a little to reduce spin
>>>lag.
>Does anyone (Mike) know how strong the factory crank actually is? How much
>horsepower/torque can it safely handle? How much weight can be safely
>shaved?
I don't know because the GA16 is pretty undeveloped. Bob Legere is the best
guy I know of when it comes to building the GA16.
Generaly for a long term motor, street or roadrace/rally I would not lighten
the counterweights much more that the reduction of piston rod weight. I
don't know about knife edging in this case. I would bullnose (round off the
leading and trailing edges of the counterweight) the crank to clean up the
leading edge of the counter weights.
Knife edging is more of a drag racing trick on NA motors. Personaly I don't
do much crank lightening on my motors, just usally clean up the parting line
flash, shotpeen, balance and cryo.
On SR20's I just balance them because the crank is so strong. I guess if I
was building a really serious SR I would do the bullnosing and cryo also.
Mike
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