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i want to start off with a good f/r tire pressure for auto-x

i am running 17x7 usng zeix512 205/40/17's whats a good pressure guys

 
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well, i have 215/45/17 size FALKEN ziex ze-512 tires too and i've got 35 lbs all the way around my car. i think thats perfect IMO.

 
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Set them high, and play with it, start around 40. IMO, thats way too small of a sidewall for autoX, and you may find yourself riding the lip of the rim if you don't get it high enough. Find someone who knows what they're doing and get them to help you find the right pressure. its hard to explain. Basically you want to set it so the tire rolls to the tip of the arrow on the sidewall that marks the treadwear indicators.

 
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hmm maybe 40/38

 
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I have them in 215/45/17 and run them at 35f / 33r. The sidewalls are pretty weak though, so I'd run them probably at least 37-38 for auto-x.

 
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dang i got 215/40/17 and i got my air pressure at like 30 pounds. may be i shoud put more air in... i know the max pressure is like 50 or pounds.

 
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35 psi for all 4 man!. it's perfect!

 
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How much camber are you running?

When I had "stock" camber with a set of 512's I had to run the fronts at around 45-47 to keep them from rolling over. the rears floated at around 35-37 depending on rotation needs of the track.

 
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This is what Tirerack says:

"Tire pressures should be higher than used for the street, usually 45psi-Front/35psi-Rear for a front-wheel-drive car, or 40psi all around for a rear-wheel-drive car."

http://www.tirerack.com/features/solo2/handbook.htm

Put it high and work it down like they were saying. But thats a nice little handbook for other things.