11-08-2009, 11:28 AM
Join Date: Oct 2002
Location: Mclean, VA
So I drove my F104 for the first time yesterday (100'x50' indoor asphalt track), but before even putting the car down on the track I made some initial changes from the stock setup. I put some heavier springs on front and a lighter spring in the center shock. Also, I replaced the stock spur with an adapter to use a kimbrough type spur which definitely helped the differential action.
The car pretty much pushed mid corner and a little on power during corner exit. Went back to the stock springs and the car was finally steering, but was still overshooting the turn when coming in too hot. I did notice the twitchiness on the straight away and dialed out about -40 steering exponential which fixed the twitchiness. The only place I felt the car was loose was on the straight, but after making it less sensitive on center that high speed twitchiness went away.
I only got few practice runs in before I had to leave. The car definitely feels like it has a lot of corner speed. I plan on working on the rear end next practice session to help with the overshooting. Maybe play with the esc braking profiles too. Overall, not a bad first outing. Anyhow, the track where I race is going carpet next weekend for the winter so it looks like I'll be continuing my setup development on carpet.
- 9551 steering servo
- Airtronics 94722 receiver (M11x) and M11x transmitter
- LRP QC3 (stock settings)
- Tamiya silver can motor
- AMB transponder
- TP 3200mah 40C LiPO
- D\R setting 70% - basically was able to do a circle in the tightest area of the track
- Steering EPA 100%
- Steering EXP ended up with -35%
- Kit tires (no truing was done - around 63 to 64mm fr and rr - ride height was around 5mm fr and rr)
- Front track stock
- Stock kit front springs
- 30K lube on king pin
- 1 degree camber
- No toe - wheels straight
- Front ride height shims in stock setting
- Silver spring on rear shock - 20wt oil -I think it's an old Yokomo spring that is very light. Plan to go back to red spring on carpet. Hardly any pre-load on spring.
- Stock t-bar
- Rear pod friction pad adjuster around 4.5mm down from top
- AE diff grease on pod
- Rear track stock
- Ride height adjuster - ride height adj #3 flipped to achieve 5mm
- Jack the gripper - 1/3 fr and full rear
- Rear wing setting at lowest position for most downforce
- 25 or 26 pinion and 96 spur
- Diff locked
- Aluminum rear pod used.
Last edited by Apex; 11-11-2009 at 11:22 AM.