[Walt Fricke]

Well, from what I can see from my 2.7 and 2.8 70.4 cranked engines, careful application of red Loctite and torqueing the flywheel bolts to 150 lbs/ft have solved the problem of flywheel shedding. It seemed Porsche didn't figure that out back in the day with the 2.8 RSRs, although I've not gone over 8,200 in any routine way (rev limit set there) with either. The RSR's advertised peak HP was at 8,000, so I have no idea where Porsche had its drivers shift, though the efficient shift RPM would certainly be well above 8,000.

My cranks 70.4 cranks haven't broken either, though I'd love to have one with RSR fillets if I could afford it.