Before we go too much further, we need a PSRU that can handle 500+hp.
We've already had flywheels [flex plate] disintegrate and my
input shaft broke the
lock pin.  I would consider installing a turbo, but in my opinion, the
psru is the weakest link.

Mark
P-port 20b


 My last trip to Tracy's we discussed this. His recommendation  is to use
 an aftermarket aluminum flywheel and attach the PSRU input to that. His
 latest iteration of the PSRU will attach to this flywheel easily he says.

 As far as the lock pin, that would take more thought. Drilling it out
 and installing a larger diameter pin will increase the shear of the pin
 itself but at a cost to the strength of the shaft itself.

 Kevin Alderman

 Just install two lock pins 90 degrees to each other.

 We did that on Dave's turbo Reno racer.

 When I get home I will send a dwg. We have been around and around on this.
 I am surprised Tracy did not mention it or start doing it.

 Paul Lamar

That aluminum flywheel idea is good. Even after shaving pounds off of the
steel flywheel that Paul sent it is still pretty heavy. The alternator fits
Behind the flywheel tho which was our first goal and it snap, crackle, and
pops just turning it by hand. Milo

Here are the dwg on the sun gear fix. I am surprised Tracy has not put two pins in it
 by now.

It failed again after Tracy fixed it once.

Paul Lamar


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