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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
Well the original poster hasn't come back so no pertinent information to plug in anyway.
Re-gearing a 930 tranny is an expensive endeavor. I wouldn't do it myself until I was certain that the engine was never going to be fiddled with again. Every time you change the level of power or the RPM range where power is made you affect how the gearing works for you. Think diesel truck vs motorcycle.

Sorry Keith, you simply cannot have a discussion about gearing without bringing up the torque curve. That would be like trying to calculate your speed with no regard for tire height. There is a direct relationship.

I would suggest that the original poster get ahold of Bill Verburg. He has a ton of great info on the subject.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 05-15-2010, 07:00 PM
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