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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,525
Bruce Anderson has a few blurbs in his book about folks fitting 915s into a 930 in the days before the G50.

The bad news is the 915 5spd is not nearly as strong as the 930 4spd. The good news is that if your engine is stock it doesn't need to be that strong. More good news is that for the cost of a set of core Webers you can buy a good 915.

I have a 915 in my widebody 3.3L turbo powered SC. The gearing is great for a stock 930 engine, it make it feel like 100HP more than it is. The gearing becomes not-so-good once you hit the 275RWHP figure. At that point (in my opinion) you have enough brass to use the long legs of the 930 4spd.

The top end will be gear limited with a 915. I can pull about 155mph at close to 7000rpm in 5th gear. Very fun stuff!

Again, with a stock or warmed-over engine a 915 is great fun. With a built engine it is a liability.
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 04-26-2007, 06:36 PM
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