Quote:
Originally Posted by Charlie V
I understand the upper limit of a good 915 transmission is 350 hp.
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Well, sort of. Remember, the factory introduced the G50 to the 3.2 range - at least partly because the 915 wasn't up to it.
Hayden (of WEVO) said years ago that anything over 300 ft/lbs below 3000 RPM was a crap shoot - that nothing you did would make a 915 reliably stand up to that.
930s with a half-decent (eg 30 year old) turbo tend to make 80% of peak torque around 3000 RPM. Higher revving (eg N/A) motor, especially in a lighter car, without big sticky tires and hard launches does improve the odds. 915 internals do look shockingly puny next to G50 parts though.
I ran a built 915 for some years with 370 wheel HP from a CIS 930. It involved many compromises, including an anti-social clutch to hold the torque and babying it/driving around the weak points. It broke enough parts (including eating 4-5 teeth off an aged 2nd gearset when I wasn't even trying) that you really never forget that you're pushing the envelope and your luck.