Koni FSD Shocks

[Don Bradner]

Assuming 12R22.5 tires, 105 is proper for an axle weight (single) of 13.2K,
leaving you 1K short. Recommended for 14.2K would be 115. I don't like to start
out 10% low.

You are dead-on to slightly-over on the drivers and tag.

On 4/4/2007 at 6:14 PM David Brady wrote:

>Robert,
>
>I just installed the FSD's on the rear of my LXi and the
>results are astonishing. The ride over the rough stuff is
>much smoother and the handling is more responsive. Now
>we have to put pressure on Koni to develop the FSD's
>for the front. I've been told by Justin at Koni that the fronts
>require a higher pressure rated FSD valve due to the 45 deg
>mounting angle of the shock (something like a 2:1 ratio of
>axle movement versus shock movement). Justin recommended
>adjusting the front shocks one turn from full soft. The extra
>control that the rear shocks provide helps iron out some of
>the porpoising up front. I found that if the front shocks are too
>stiff, the front end seems to fall into road when hitting bumps,
>adjusting one turn from full soft lets the tires follow the roadway.
>
>I also installed Crossfires and Centramatics. The Centramatics
>provide a noticeable improvement in smoothness - highly
>recommended (NFI). I run 105, 90, 85 tire psi front to back. My
>tag airbag pressure is 65 to 67psi. My weight is steer: 14.2K,
>drive: 22K, and tag: 11K.

Don Bradner
90 PT40 "Blue Thunder"
Eureka, CA