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AutoX recomendations on tire pressure of Kumho 712's?

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Old Sep 24, 2002 | 09:25 PM
  #1  
Volcom's Avatar
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Default AutoX recomendations on tire pressure of Kumho 712's?

94 RS Stock suspension, Type-R rear swaybar
16" Slipstreams with Kumho ESCTA 712's.

I ran my last event at fronts: 43 hot
rears: 37-38 hot

Anybody see anything I should change? I was getting the fronts to rollover a little over the little triangles on the fronts (someone told me that is where I should try and aim) and about 2mm away from the tirangles on the rears.

Any suggestions would be great. Can I run lower pressure in the fronts and the rears? I am scared to roll the tire off the wheel if I go lower. I'm new to the sport and just need some direction.

Thanks a bunch
Aaron
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Old Sep 25, 2002 | 03:50 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (Volcom)

what size wheels and what size tires? That would help
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Old Sep 25, 2002 | 05:29 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (CivicSiRacer)

Well he listed the rims as 16 so we might assume the tires are 205/16s??? But when I was running them last year I had my 15s set at 46-47 front and about 38 in the rear. And once they start to squeal you've gone beyond their traction limit.
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Old Sep 25, 2002 | 06:09 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (Civic242)

yeah but 16x7" and 16x7.5" rims use different pressures. And I ran 215/40x16" but there are also 205/45x16" 205/40x16" 225/40x16".....
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Old Sep 25, 2002 | 09:08 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (CivicSiRacer)

'95 RS
-2.25 degrees camber front
215/40/16 on 16x7"
H&R OE Sport springs
KYB AGX
ST swaybars f/r

45-46 front, 42-44 back. Variation for different courses/surfaces. I tended to get the fronts about halfway onto the triangles, the rears were a little away.


[Modified by WRXRacer111, 10:09 AM 9/25/2002]
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Old Sep 25, 2002 | 10:21 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (WRXRacer111)

I used to run 39 all around with eibach sportlines/kyb agx/comptech swaybar on my si. Alignment was -1.5F/-1.3R camber with 0 toe front -1/32 toe in rear. I had no rolover issues wiht those pressures.
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Old Sep 25, 2002 | 10:42 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (ryan12321)

I ran 16x7.5" Kosei K1s with 215/40x16" Kumho 712s and with a pyrometer I found 42f/38r worked for me. 712s have a soft sidewall compared to my A520s and Azenis I have now. The A520s needed 39f/34r to work and Azenis need 38/31.
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Old Sep 25, 2002 | 11:44 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (CivicSiRacer)

I'm sorry, I should have listied that!
The wheels are 16*7's and tire size of 205/45/16

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Old Sep 25, 2002 | 02:54 PM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (Civic242)

And once they start to squeal you've gone beyond their traction limit.
dude, he said they are Kumho 712s!!!

Mike
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Old Sep 25, 2002 | 11:09 PM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (RacerMike)

And once they start to squeal you've gone beyond their traction limit.

dude, he said they are Kumho 712s!!!

Mike
???? Yeah I read that he has Kumho 712s??? Yet I still don't get your point??? I'm on my second set of 712s and when you hear them squealing get ready for a nice push or spin. Do you think their range of traction improves when you hear them squealing??? ???
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Old Sep 26, 2002 | 01:04 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (Civic242)

???? Yeah I read that he has Kumho 712s??? Yet I still don't get your point??? I'm on my second set of 712s and when you hear them squealing get ready for a nice push or spin. Do you think their range of traction improves when you hear them squealing??? ???
my point is 712s squeal doing 5mph on an off ramp...their maximum traction point is long after they start to squeal.

Mike
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Old Sep 26, 2002 | 06:26 AM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (RacerMike)

my point is 712s squeal doing 5mph on an off ramp...their maximum traction point is long after they start to squeal.

Mike
Oh I never noticed that with my sets of Kumho untill pushed to the limit.
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Old Sep 26, 2002 | 09:03 PM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (Civic242)

Well he listed the rims as 16 so we might assume the tires are 205/16s??? But when I was running them last year I had my 15s set at 46-47 front and about 38 in the rear. And once they start to squeal you've gone beyond their traction limit.
This is about what I used to run with a 'pushing' spring setup that I have changed. I also have a ITR rear antisway on my GSR. I would watch the front sidewalls for roll-over and adjust the rear for under or oversteer.
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Old Sep 27, 2002 | 02:00 PM
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Default Re: AutoX recomendations on tire pressure of Kumho 712's? (Civic242)

my point is 712s squeal doing 5mph on an off ramp...their maximum traction point is long after they start to squeal.

Mike

Oh I never noticed that with my sets of Kumho untill pushed to the limit.
i've never noticed that either.. mine always squeel after they've given me all the traction they can but at 'normal' speeds they're not loud by any means.. hmph. i run 40f/36r cold on my 195/55/15's with great success.. slight roll only when i overdrive them..
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