Tire PSI
 

What kind of PSI is everyone running in their tires for draging? Usually I like to keep it safe in the 32-38 range, but I see people run mid 20s and lower with higher hp Evos. I also heard to run higher in front and lower in the back, not sure why.

38? hot damn that's high. I thought 32 was the suggested operating psi, so any higher i would figure would just hurt you.

Mid 20's sounds right.

And if it helps, i know for fwd, you want low in front (obviously) and higher in the back because u're just draggin the rear wheels around so you want them to be dragged as easily as possible. Is the Evo a 50/50 split for power?

32 in the front, 29 in the back

I'd run them at stock tire pressure, and learn how to launch real well, then play with tire pressure from there, buuuuut-
Problem with radial tires is that when you lower the tire pressue you change the contact pattern that the tread makes with the ground, lower tire pressure makes the inside ring of the tire collapse, and you are running mostly on sidewalls(more drag, but more contact patch with slicks/dr's), and higher pressure makes the inside bulge out, less contact with road, and less drag. Slicks are a different beast, they expand and contract more freely as the tire rotation increases/decreases.
Dropping the tire pressure a pound or slightly more on DD street tire may help a bit, but any lower will hurt you.
When i was racing my truck, dropping the rears more than 5 lbs hurt my launch, but that was on a RWD truck ,so tire pressure is even more critical.

I pull 1.6x 60's in my VR-4 with my tire pressure around 36psi front & rear. I never changed it between autocrosses when I hit the track. I have 245/40/18 Aziens RT-615s.

yea, upper 30s is a little on the high side. i usually only run that in the summer when the track is prepped really well. i feel its safer to spin then end up breaking something. Last time i went, i was running 38/36 and pulled a 1.73 60. Ill probably drop it to around 30 since its colder and will work around from there.

22 front and 19 in the back...Still spins like crazy though