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tire pressure...what do you run?

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Old Oct 20, 2003 | 05:31 PM
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Z dude's Avatar
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From: ME.
Car: 1991 Z-28
Engine: TPI
Transmission: 5-speed Rear:3.73
tire pressure...what do you run?

Im just wondering what people are running in there
245/50/16's

I always had run like 38-40.... but Id like to see what everyone else is running
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Old Oct 20, 2003 | 06:42 PM
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89RsPower!'s Avatar
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
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Axle/Gears: 3.07, 373, 4.10
hmm you should probably go by what the tires are rated for.. it should say on em.. i normally keep mine around 32-33ish
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Old Oct 20, 2003 | 06:44 PM
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From: ME.
Car: 1991 Z-28
Engine: TPI
Transmission: 5-speed Rear:3.73
44 is max
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Old Oct 20, 2003 | 09:41 PM
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Stingraye's Avatar
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From: SE Pennsylvania
Car: 1986 Trans Am
Engine: 350 W/Plenty of Mods
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I work at a pontiac dealership, and I generall fill everything that comes in my bay to roughly 32 psi. for the 245's, I generally wouldn't go much higher than 35. Remember, when it comes to tires, you generally want to stick right to what the TIRE calls for. Going higher will take less tread off the road, while too low allows it to ride on the sides of the tires and actually buckles the middle of the tire in. So I would go with what's on the tire, if there's nothing on there, go with 35.
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Old Oct 20, 2003 | 10:05 PM
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llvll4l2c91350's Avatar
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32
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Old Oct 21, 2003 | 04:35 AM
  #6  
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From: Burnaby, BC, Canada
Car: 1989 Camaro Iroc-Z
Engine: 305 TPI (LB9)
Transmission: Auto 4
usually 32-34psi front

little softer on the back cause i have no tread
30-32psi

all 245/50 R16s

I have no alignment, wander issues (cept for some of the roads I have to drive on under breaking)

and no uneven tire wear.
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Old Oct 21, 2003 | 05:42 AM
  #7  
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From: ME.
Car: 1991 Z-28
Engine: TPI
Transmission: 5-speed Rear:3.73
ok thanks guys..I guess I'll go around the 35 mark
seeings that the max is 44 PSI

Last edited by Z dude; Oct 21, 2003 at 08:04 AM.
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Old Oct 21, 2003 | 07:59 AM
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From: Bowling Green KY
Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
I work at a pontiac dealership, and I generall fill everything that comes in my bay to roughly 32 psi. for the 245's, I generally wouldn't go much higher than 35. Remember, when it comes to tires, you generally want to stick right to what the TIRE calls for. Going higher will take less tread off the road, while too low allows it to ride on the sides of the tires and actually buckles the middle of the tire in. So I would go with what's on the tire, if there's nothing on there, go with 35.
That is wrong. If the vehicle has OE size tires with an OE load rating you should go by the Tire Sticker. In my IROC the sticker reads 30 Front and 30Rear cold with the OE 245/50/16 tires. GM also recommends adding 4 psi to that if the tires are hot. Now this is for "normal" driving. If you autocross or drag race or just prefer a stiffer or softer ride you adjust to your preference. The pressure rating on the tire is the max that tire is designed to handle, not what it is supposed to be inflated too.
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Old Oct 21, 2003 | 07:44 PM
  #9  
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From: SE Pennsylvania
Car: 1986 Trans Am
Engine: 350 W/Plenty of Mods
Transmission: T5
I work at a pontiac dealership, and I generall fill everything that comes in my bay to roughly 32 psi. for the 245's, I generally wouldn't go much higher than 35. Remember, when it comes to tires, you generally want to stick right to what the TIRE calls for. Going higher will take less tread off the road, while too low allows it to ride on the sides of the tires and actually buckles the middle of the tire in. So I would go with what's on the tire, if there's nothing on there, go with 35.
That is wrong. If the vehicle has OE size tires with an OE load rating you should go by the Tire Sticker. In my IROC the sticker reads 30 Front and 30Rear cold with the OE 245/50/16 tires.
OK, so then you are agreeing with me, i'm not wrong. What I said is you want to stick right to what the TIRE calls for, if it's still OE than you can find out what it calls for either on the tire itself or inside the drivers door. What you said there agrees with how I put it. Just makin sure we're on the same level here...
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Old Oct 22, 2003 | 07:49 PM
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From: Bowling Green KY
Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
I do believe I read that too fast and too early in the morning. I misunderstood what you had said. I now know you meant go by the tire if the manufacturer spec is unknown, but not to exceed the tires max rated psi. I guess I have gotten a little tempermental after seeing several cars in my bay with tire pressures in excess of 80 psi when spec is 26 psi.

You have my sincere apologies. 7:00 am on Monday sucks
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Old Oct 22, 2003 | 08:04 PM
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From: Milwaukee, Wisconsin
Car: 1982 Trans Am
Engine: LG4
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32 all around. Whats a good psi to run on a Friday night?
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Old Oct 22, 2003 | 08:17 PM
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From: ME.
Car: 1991 Z-28
Engine: TPI
Transmission: 5-speed Rear:3.73
Originally posted by TransAm12sec
32 all around. Whats a good psi to run on a Friday night?
I think 40 ....oops wait thats 40 oz

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