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RarlyL8 RarlyL8 is online now
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,551
Garage
A client who has both '89 930 and '91 964T reports they are not the same ratio, the 930 being lower geared. He purchased both cars new so ratios are stock. That is my one data point as I am not a transmission guy.

Yes I use a 915 with my modest HP engine. I have built 2 boxes using WEVO bearing retainer and late model side plate cover. If not abused or tracked the tranny will last. I damaged the shims on one tranny drag racing. The second tranny has custom 4th and 5th gears for the highway. First is too low unless you like to auto-x and then is perfect. 2nd gear will haze the 315 tires with 300WHP. With 350WHP 2nd will roast and 3rd gear will haze. Stupid quick in 1-3 gears. With 400WHP the tranny will break at will.
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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

Last edited by RarlyL8; 03-05-2010 at 10:28 AM..
Old 03-05-2010, 10:21 AM
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