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Author Topic:   shock question
posted November 23, 2003 09:37 AM
what would happen if you put a bilstein 3050 on the right front, vs. a 30/60? at the same time, putting the 30/60 on the drivers side? basically just switching sides on which the shocks are mounted.....
if i run the bilsteins, 30/60 on the right front, the shock bottoms out. but, if i switch to afco 76, it does not come close to bottoming out. any help would be appreciated.

lf -700lbs spring
rf-800lbs spring


posted November 23, 2003 06:50 PM
Bilstein numbers are reversed

posted November 24, 2003 06:03 PM
When you run Bilstein, the first number is the Rebound and the second number is Compression. First, if the car is bottoming the RF suspension, increase the spring rate. Shocks should be used for as a fine tuning device. Second, if the AFCO shock with the same valving doesn't hit, you may need to check your Bilstein on a shock dyno and make sure you haven't lost gas pressure or a damaged valve stack. While you're at the shock dyno, compare the Bilstein to the AFCO as see how they differ. The quality control of the AFCO shocks is poor compared to Bilstein, and just because the shock is labeled a "6" only means that it's not soft enough to be rated a "5", nor is it stiff enough to be rated a "7". The shock dyno is the only way to know. Good luck.

posted November 24, 2003 07:52 PM
thanks all 4 advice



posted November 25, 2003 05:21 AM
I know we're all trying to spend our money wisely in racing. But, you get what you pay for when it comes to shocks. They are such a critical tuning device. They can't make a horribly handling car run up front, they're only a fine tuning tool. But, they can make a good handling car horrible if they get messed up or you choose the wrong valving. You get repeatability and quality when you buy a better shock. Carrera has come out with a new low pressure gas shock that my buddy did some R&D work on and said they worked very well. They're on the market now, and priced quite a bit less than a Bilstein. I know AFCO makes some quality upper end shocks that work very well. Make sure you understand what the shock is doing and what you're trying to accomplish with the shock valving. This info will allow an engineer at one of the shock companies to point you in the right direction. Don't just run the same shocks that are on a car at your track. Try and understand the physics and geometry. This will help you in the long run.

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