STX (Street Touring X) Tire pressure baseline?
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Wow I'm way off you giuys. I went with 35 front and 32 rear. That kept things ok. What's the thought behind running high rear pressures? I was fastest STX car with couple of BRZ etc. Fastest ST class car overall. Beat plenty of dot r clad cars too. I'm thniking with LSD and wider tires and wheels this car may be pretty quick at regional level.
Last edited by grantsfo; 02-23-2014 at 04:44 PM.
#7
Wow I'm way off you giuys. I went with 35 front and 32 rear. That kept things ok. What's the thought behind running high rear pressures? I was fastest STX car with couple of BRZ etc. Fastest ST class car overall. Beat plenty of dot r clad cars too. I'm thniking with LSD and wider tires and wheels this car may be pretty quick at regional level.
We run a higher rear pressure to encourage the car to rotate more.
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#8
My car seemed to rotate fine. If anything it tended to over rotate but I can live with that!
I have to look at whether I have a little preload in my rear bar as car snap oversteered in couple places.
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Well in STX you can fix some of the shortcomings of a strut/multilink suspension but you don't have nearly the allowances you have in the prepared classes like you are used to. Tire pressures are a tuning tool just like everything else and they're used to dial in the car to surface conditions just like shock settings. Some people will change springs/alignment/shock settings/tire pressures just to switch from asphalt to concrete. We just use shock settings/tire pressures.
Do you have an aftermarket rear swaybar? If so I'm not surprised to hear your car has snap oversteer. Mismatched roll rates from a large rear swaybar will do that. I know everyone does suspension setup differently but I'm a "more spring less bar" person which means our car rotates just fine with stock swaybars.
But hey if you're happy with what you have than stick with it. Seems like you're doing pretty good at a regional level so unless your local competition is getting faster or you're planning on going to national level events there probably isn't any reason to mess with it. If the car is fun to drive that's all that really matters.
Do you have an aftermarket rear swaybar? If so I'm not surprised to hear your car has snap oversteer. Mismatched roll rates from a large rear swaybar will do that. I know everyone does suspension setup differently but I'm a "more spring less bar" person which means our car rotates just fine with stock swaybars.
But hey if you're happy with what you have than stick with it. Seems like you're doing pretty good at a regional level so unless your local competition is getting faster or you're planning on going to national level events there probably isn't any reason to mess with it. If the car is fun to drive that's all that really matters.
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