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Yargk Yargk is offline
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Join Date: Feb 2000
Location: SF bay area, CA
Posts: 674
I have 22/29 mm torsion bars. Feels great on the street, but the rear is too soft for the track. Specifically, 22/29 is not balanced compared to a stock 930.

Stock 930 18.8 / 26

so 22 / 29 is 87% stiffer in the front and 55% stiffer in the rear

I am going to switch to 31s in the rear (keeping the 22s in the front) or go for 23/33

IMHO, I think the following are good setups:

21/29 56% stiffer front 55% stiffer rear
22/31 87% stiffer front 102% stiffer rear
23/33 124% stiffer front 160% stiffer rear

These rates are for 930s, for which people tend to want stiffer rears, however the logic might apply to narrow body turbo 911s too.
1979 930
2007 WRX wagon
Old 06-03-2013, 02:23 PM
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