- BMI Racing DB12R - Jason Schreffler - Cleveland - 21-25.11.2007 -

 

I ran some parts that were prototypes over the stock car kit. Those parts were Jason's new cross brace, which is something he's releasing and I also had a different chassis plate. The test chassis I have is 3mm shorter in wheelbase from the front end. I'm not quite sure this helped or hurt. It turned better than the stock car, but when it got bumpy, it probably hurt. I also had much thinner side plates to work with from testing of the original DB12R from back at SnowBirds.

Here's the setup I ran...

Front

.018 springs with #4 WindTunnel Dampening Fluid
BMI #2 spacers
.010 preload in the front springs
-1.5 camber
.020 shims added to the front axles to widen the front end
4 degrees caster
Servo angled
0 degree toe

Rear

Red Center shock spring
50wt oil in Center shock
#4 WindTunnel Dampening Fluid in the tubes
.060 side plates
3.5 rear ride height adjusters in down position

I forget how long the center shock is. I know the car had roughly 1mm of pod droop. It was 3.5mm in ride height at race weight. Tires were Parma Magenta front and Parma Grey rear. The rear was widened to 172. Parmas have a 1.5mm offset. I also ran a Parma Speed 8 Lightweight.

I think that about does it on the setup. I can't think of anything else.

The biggest issue I had with the car was just keeping it smooth. Earlier in the week, it was fast enough to easily make the show. When the track started getting bumpy, the car kinda "went away" on me. I tried all sorts of things to combat it, but I never nailed it. The setup above was what I ran in the main and it was better than it was all weekend. It still needed work, but we're still learning the car.

I wanna thank Jay for getting the car to me in time to get some testing done. Unfortunately, we no longer have a track locally. We're working on that though. Things will only get better.

Source: