Thread: 930 suspension
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DDDD DDDD is offline
Join Date: Jan 2007
Posts: 1,077
Originally Posted by Garrison View Post
22/28 seems to be a common way to go in the SC's and such. Just figured in the 930's people would be going with 30 or 31 in the rear. Have thought about full coil over, but for mostly street driving it doesn't seem worth the $$$$$.
I have 23mm and 30mm, which is great until you hit a deep pothole and then it is really jarring, but part of that is that Bilstein sports have inferior dampening to the fox shocks or motons or JRZ. On big hits, the bilstein is not able to release pressure because it does not have a relief valve like the more expensive shocks.

If you really want to start right than you need bilsteins custom valved by somebody like Steve at to your car's weight and torsion bar rate (it is not much more expensive because they sell you the shock at the same time and just fiddle with it) or the next step up is Fox Shocks by smart racing, which cut about two seconds a lap off of Bilsteins. Excellence magazine did a comparison and the results are at the smart racing website. Two seconds a lap is the equivalent of 75 extra horsepower in their comparison, massive difference from shocks alone.

Another advantage of custom bilsteins is that they sell them to you with lowered front spindles that will let you lower your car very low. The fancy shocks already have this feature.

Smart racing makes a adjustable ERP bump steer kit that will keep your bump steering straight if you go really low in ride height. Having proper bump steer is the most important overlooked thing in lowering a 930.

Sway bars make your ride choppy if you overdo it. You are better off getting your stiffness from your torsion bars and shocks and use the anti-roll bars only if you want to tune in some extra over/understeer. You can add sway bars later to fine tune what you do initially if it needs something extra.

Long story short, your shocks are very important and it does not cost much more to get them custom valved from day one to your car's weight and torsion bar rates.
Old 02-14-2009, 06:22 AM
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