Wednesday, December 7, 2011
This is again an F104 lower arm, with the camber plate directly on top of the arm. Xpress parts are used to control the caster, and as the upper eyelet on the kingpin. 35mm turnbuckles for all links are a good size if you want to set up a front end like this. Everything else is from a 104 front end. Generally, 1* camber or less and 6* caster are a good place to start, with black springs. Ride height should be at the minimum legal.
I should point out that I like to try to control the roll of the car at the t bar. Rubber tires are heavy, and i think that they require a bit more roll stiffness. To that end, I have been using the standard t bar, with a .5mm metal shim on the forward screw, and an .060" nylon washer at the rear, with the large outer o ring from an F104 t bar around the washer. I was trying to limit the movement of the T bar without making it solid or too stiff. The car's short length makes it prone to traction roll at times, from the small amount of running i have done with it. Taking a stab at things, I did try both OFNA Diff Lock and 100,000wt diff oil on the damper plates. The OFNA lube, which is like glue, made the car do some strange things, like pirouettes... Anyway, 100,000 wt may have been better, but I cut a tire sidewall and the car was looping out randomly. I'm not sure how to handle the t bar setup with this car yet. I may just throw everything out the window and run the car soft with minimal caster. Caster is a problem if you run too much in a high traction situation, since it cross weights the car and induces even more roll. So as the car wants to traction roll, you have to take caster out.
The first night i ran the car, it was actually pretty good, and the week I had to think about it may have just resulted in some over thinking. It probably just needs a solid practice day to get an idea of what it likes and it will be very good.