Need advice on tire inflation with R compounds

[assman]

This coming weeking is my first autoX of the year and I have only run once with my Kumho victoracer v700 on 16'' Fd's and it was raining. So I would like some advice on what you guys would suggest I set my tires at for a hot sunny dry day.

Thanks

 

[8.5MS3]

mods? specifically suspension

 

[assman]

All I have done is a MM, CPE CAI, Forge BPV for now. No suspension mods, although I have replaced my rr shock 3 times!!!!!!

 

[8.5MS3]

your car is going to understeer like mad, you want rotation

36-38F 40-44R

chalk the sidewalls, you dont want the front rolling over. if your oversteering, lower the back, if your understeering, slow down and lower the front, but not to the point your running on the sidewall

 

[assman]

Thanks for the advice. I will try the high end of your suggestions and lower as required because I wont have any way to fill it back up while there.

 

[MikeHTally]

Have fun!

 

[RacerX78]

I autox'd this past weekend and ended up running F45R35 and was able to get the back end to come around nicely

 

[assman]

Hmm thats the opposite from the other guy. I think I will just start at max pressure front and rear and then lower as needed throughout the day.

 

[RacerX78]

Check out Tire Rack: Tire Pressure For Competition Tires This was backed up in other AutoX books. If you want to reduce understeer you run higher pressure in the front that back. If you had a RWD you would want to reduce oversteer in which you would want to run higher pressure in the back than front. The only want running higher pressure in the back will help it slide better is if your "over inflating " the tire so that there's less of a contact patch on the ground. which isn't good for overall handling.

I ran my fully built suspension civic like this and it felt like a RWD going around corners.

 

[assman]

Good read, it helps explain things a little better.

 

[meicalnissyen]

Thanks for the advice. I will try the high end of your suggestions and lower as required because I wont have any way to fill it back up while there.

10 bux gets u compressor ffom walmart

the pressures will increase after runs

 

[assman]

Ive been thinking of getting a compressor. I am part of a new car club here because I moved so I wont know anyone there but with my old club there was always someone to borrow from that I knew. I will probably go buy one before the autoX just to be safe.

I cant wait, next mods to buy are springs and sway bars after that I should be pretty competetive in my class. Unfortunately by buying the new tires it bumps me out of my old class which was way easier considering I got 2nd place by 1/100th on my 2nd autoX I ever had.