andyberg

I just tried adjusting my yellow koni's to their stiffest setting and it didn't seem to change much between stiffest and softest. I was pushing on the front fender to gauge stiffness. I had Bilstien sports on another car and remember them being a lot stiffer than the Koni's. Any ideas?

Thanks,

Bill Gregory

If I remember correctly, on the sport yellow Koni's the difference in rebound is about 100% between the two extremes. You're not adjusting compression, so you shouldn't notice any differences pushing on the fender. When thinking about the other car with Bilsteins, did it have the same size torsion bars or springs as the one with Koni's? Vehicle stiffness is determined by the torsion bars or springs. The shocks just keep them under control when they start springing.

andyberg

Thanks Bill,
The other car actually had 19MM torsions and this car has 21's. Thanks for the advice, I was not aware it was the rebound that was adjusted. I'll check it again.

Mark W

Andy,

Another problem with comparing Koni to Bilstein Sports are that there are 2 separate part numbers for 911 fronts that are both called "Sport". The older "Sport" front with the last numbers 5049 are actually the RSR valving which has equal compression and rebound, 160/160 I beleave. The updated "Sport" front shock #5050 has softer compression and firmer rebound, something like 110/220.

So, if the other car had the 5049 then it would be very stiff on compression. I suspect the Koni is more like the 5050 for compression.

BTW, The 5050 is the correct front shock for a combo street/track car IMHO. I have them on mine and it virtually eliminates the pogo stick effect 911's are prone to get in rough corners.