Ive been doing a lot of research and Sprint Car setup work, but I have a question about rear tires. My impression is that they should follow the standard 5-10 degree IMO rule, but I feel like I’m sacrificing traction on acceleration. Especially in time trials. Is an even tire temp ok for TT? Is the IMO better for Race situations? Thanks!
I think the general idea about TT is good, but how is implemented today is almost unusable. For some cars as the Formula-Vintage, you receive the car with a tire pressure that make the tires spin like if racing over ice, even if you set the lower pressure possible on the garage. You can't made more than one lap in those conditions, you set 1.2 bars on the garage, then you receive the car with 1.4 , and by half of the first lap tires are over 1.5 bars. Same with brakes. Sometimes I think nobody test these things before release. All this ends up that everybody make a setup just for TT unusable for a normal race, so if somebody hope to get some help from TT, they will get lost trying it.
Im not talking about default setups, warm or cold. Im talking about testing cars (in practice sessions) and developing your own setups specifically for rear tire temp and traction. Obviously if you start a TT, the tires are warm, but the camber/pressure could still be off. What I'm trying to get an answer to is from a theoretical standpoint. Like whether a cambered rear is ok for race trim. Or if a more balanced rear tire temperature wise, is the goal for TT or Race trim.
I would follow the IMO in my opinion, works best, just try turning up the Diff or softening the rear anti roll/suspension tweeks, you will only lose more traction if the IMO is way out. But because the Sprint car is Mid rear wheel drive, try to get a more equal spread of 6 max maybe 4. Lowering the pressure might work for 1-2 laps but the tyre will overheat/rollover itself causing issues, if too low but dropping a bit might help or less camber.
