GTA-88

Does anyone know how big the airpressure shall be in the tyres, both front and rear. The car is a T/A GTA-88 with gold spoke
Thanks


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T/A GTA -88
TH700 350 TPI

RB83L69

Hmm... should be around 35 psi front, probably 33 in the rear... don't know about in kpa...

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"So many Mustangs, so little time..."

Drew

iTrader: (58)

Check the tire card in the door jam. It'll tell you the exact spec... its around 30psi.

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Drew
The lone Thirdgenner of the Apocalypse
predatorman@hotmail.com
My Website
87 Iroc
91 Formula 14.3@98mph
91 RS Convertible
91 Firebird V6
92 S10
98 Grand Am GT

Red Demon

That RB guy has it correct.. That's exactly how much a couple books said hte presure should be.. about 33 in the tires..

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shouldbe</A> up shortly.

GTA-88

Thanks for the help

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T/A GTA -88
TH700 350 TPI

scottmoyer

I wouldn't go by what's in the books or on the door sticker. If the tires have ever been replaced, inflate to tire manufacturer specs. Alot of cars today say inflate to 35 max psi but the tire says inflate to 44 max psi. The tire manufacturer should know better what the ideal weight should be. I inflate mine to 41 of 44 max psi per Dunlop.

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87 IROC 350 TPI with less than 10k original miles
www.users.uswest.net/~smoyer/iroc.htm

Drew

iTrader: (58)

The spec on the tire is a manufacturers guideline for maximum pressure. The door card has the specs for the car to ride and handle as GM designed it. If you run a higher or lower pressure than is recommended by that card then your tires will wear unevenly and the car will ride and handle differently. This is explained in multiple publications and is recommended by most tire dealers.

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Drew
The lone Thirdgenner of the Apocalypse
predatorman@hotmail.com
My Website
87 Iroc
91 Formula 14.3@98mph
91 RS Convertible
91 Firebird V6
92 S10
98 Grand Am GT

85ws6TA

Drew is so so so correct. my Auto-class just went over this today. you must inflate it to the car specs.
the PSI on the side means that tire can be put on another vehicle that needs the 44psi. camaros and firebirds dont need it

stingerssx

I don't know what they teach you in auto shop, but the fact is that you should always go off of the tire itself. The reasoning is a stock size tire would have more square inches to fill than a performance tire, the stock size would use less pressure. The performance tire uses more pressure, because it has less area. In effect, both have the same pressure, taking into account their size.
So for a stock size tire, 30-35 is perfect.
For a performance tire, 40-60 psi.

But check your wear. If you get wear on just the edges of the tire, add more air. If you get a balding in the center, then drop the pressure.

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'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...
http://www.spinfrenzy.com/stingerssx...easures.html#4

Drew

iTrader: (58)

Ok, all the misinformed people that believe they should use the tires sidewall over the tire specification chart in the doorjamb, step over here...
http://www.discounttire.com/tireSafety.html

I quote, their words not mine...
"Most people think they know the correct air pressure for their vehicle's tires. Recent surveys reveal that the majority of the people who responded did not know the correct pressure recommendation for their tires or where to find it, though most thought they knew." Funny, seems this thread proves that.

And for the grand finale.
"for your convenience, here it is: the recommended tire pressure is set by the vehicle manufacturer and is in the owner's manual and on the vehicle door edge, door post, glove box or fuel door."

Any questions?

The only time when this isn't relevant is when using a non-stock size tire... If you're changing the size of the tire you're using its assumed you know how to balance the pressure.


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Drew
The lone Thirdgenner of the Apocalypse
predatorman@hotmail.com
My Website
87 Iroc
91 Formula 14.3@98mph
91 RS Convertible
91 Firebird V6
92 S10
98 Grand Am GT

stingerssx

"The only time when this isn't relevant is when using a non-stock size tire... If you're changing the size of the tire you're using its assumed you know how to balance the pressure."

Excactly what I said, Drew.


BTW, Drew (Carey)? J/K I love that show.

Drew

iTrader: (58)

Sorry, when you said "but the fact is that you should always go off of the tire itself" I misunderstood you.

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Drew
The lone Thirdgenner of the Apocalypse
predatorman@hotmail.com
My Website
87 Iroc
91 Formula 14.3@98mph
91 RS Convertible
91 Firebird V6
92 S10
98 Grand Am GT