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Old 11-24-2025 | 10:19 AM
  #852  
mstrfahrenheit
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Joined: Mar 2012
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Originally Posted by robk
Seems like you're running a lot of camber, with the car spinning off power in the sweeper. Also, why 4 caster?

Running rake in the pivot, like .5 front,, 1.0 rear for example might help the exit steering situation as well.
yes, re: camber. i went too far with it. i made a big swing so i could feel the reaction. i was going to drop it down to 1 degree but i would up spending most of the time getting ready for my gt12 main (which i podium'd also). its on the list for next practice. I ran .5 most of practice and r1 of qualy. i went 1.5 for qualy 2 and didn't like it. was gonna go down to 1 or .75 but wound up making the quick change to RR on the rear to compensate. i underestimated my changes to gt12 and wound up helping someone else at the same time. and i forgot to eat so i had to pop over to the cafe before i fainted

re: caster. seems counter intuitive to my feedback but because i couldn't get the right feel on exit, i decided to place a bet that with the track getting greasier and 10 mins of overheated tires that i was best served to double down on entry. that turned out to be the right bet cause 2nd couldnt get in better than me. i usually run 9 (or sometimes 12 on the tamiya) caster on my f1, but prodigy kingpins only go to 6. i could probably figure out how to use shims to do a caster split on the plate, but didn't have time to do that experiment. I think ultimately this is my exit issue - im used to the feel of much higher caster. if we ran a 4 or 5 min main i would have stayed at 6. we do 4 min qual and 10 min main so its always a bit of a gamble on gearing and tire temp to get a consistent run.

I hadn't thought about introducing rake in the pivot. that's a really excellent thing to try.



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