What is better for autocross?
 

Hey guys, this is going to be my first autocross with my gt86.

I have 2 set of different wheels, and i dont know which one are better for autocross.

The first set are the original 16' wheels with 205/70 original yokohama tires.
The second set are 18' Work Emotion Ultimate wheels with 235/40 goodyear asymmetric tires.

What is better for autocross? Fo better results ? My original set of 16'? Or my 18' work wheels?

Thanks.

Also can anybody help me about racing with trc off, vsc sport or normal mode?

Thanks alot and sorry about my pooor english.

depends on the actual model of the tire and what class you plan to race in. wheel size might bump you into a class that your car really shouldnt be a part of.

I'd go with the 18s. I'd also make the initial runs in vsc sport so you know what the car will do then turn it off completely, it just slows you down.

I don't know if the rules are any different for autocrosses in Peru, but per the SCCA rulebook, he has to use wheels of identical diameter and width to OEM. Offset on the wheels has to remain within 6mm of OEM spec.

I agree with the suggestion to stick with the OEM wheels and tires until you get a better feel for the car. Tires that have more grip (e.g. Extreme Performance Summer and Competition) tend to hide and/or reinforce bad habits.

Start with the 16s. I think you'll be in the powerband quicker than with the larger wheels.

Thanks to everyone. i will try the 16' wheels and vsc sport and then everything OFF.