Sunday, 28 June 2026

June 26th Friday Track time - learning a lot of new things for High traction

 I took to the track with my new low shock towers, thicker rear arb. The car was little better than before but still was slow through the turns, it understeered a bit.

I then crashed several times bent one rear aluminium turnbuckle. I managed to find a spare and replaced it. Then my volante tyres started to wear out on the front, so i replaced with new Rush 36X, the car was faster than before, but it was not very easy to drive. I put 2+2 togther and realized why, the little molding line in the middle of the tyres cause the car to have not consistent traction, and I crashed another time, destroying a right rear arm and bending another 32mm turnbuckle, plus bending a Kawada titanium hingepin.  

So i found spare rear arm and hingepin in my toolbox and replaced it. I also needed new turnbuckles, so I  found 2 shorter tamiya 28mm turnbuckles from the Alcyon II ultimate suspension set up and they are about 7mm shorter. So i placed them at an extreme angle which raises the rear roll center and made the rear camber rise pretty high. I then used the Blitz GSF II body, and wow, i really like how the car works with the rear roll center raised. I suspect the rear roll center is now same or sligthly higher than the front, the car turned it very sharply and reacted very quickly to my inputs. I was able to undercut my friend's cero ultra V1 in the corners. It was really nice to drive. 

After this session, I also noticed the rear end was hunkering down too easily and  scraping the chassis and the last 4 screws. Eventhough I  liked how it dorve, setup changes had to be made.

At home , I removed the rear Sakura 2.4 springs and replaced  with Sakura 2.6 springs. The front remain unchanged at 2.95. I also lowered the rear roll center, but not as low as before. I surmise since I increased the spring rate, I should lower the rear roll center a little to compensate. Hopefully it would still drive good. It would be another month before I can test again. The modern Blitz RS5 body worked great on the new shock towers, but I somehow liked the older GSF II body better. They both performed very well. 

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