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Discussion Starter · #1 ·
Let me know what is your Top Speed and what kind of G6 you drive a 4 cyl., 3.5L or a 3.9L?

Some one here tells me that my car gone a limited at 118 mph. I buy a G6 Coupe GTP with A/T and i don't think it gone a limited at 118 mph. I think is 135 mph.
 

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From your other post I think yours is 118. They do it to the speed rating of the tires and for some unknown reason the all-seasons on the GTP are only T rated. Doesn't make much sense seeing the GT's come standard with V rated tires and a 135mph governor.
 

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I have 'W' rated Bridgestones, so I would think my car tops out at 140 mph or better. I haven't pushed her past 90 mph, but I will try to push the envelope a little more when Spring is in full effect. ;)
 

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Fish said:
Has anyone proven the theory that GTP's are all governed at 118 with the Goodyears for sure?
It is not a theory, it is a fact,if you have 'T' rated Goodyear Eagle LS2's. The top speed of the car can not exceed the speed rating of the tires. :(
 

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SCGA1 said:
It is not a theory, it is a fact,if you have 'T' rated Goodyear Eagle LS2's. The top speed of the car can not exceed the speed rating of the tires. :(
I just looked at the equipment listing on my car and the tires are listed as P225/50R18 S Rated tires.

Wonder why there would be a diff if yours are T rated.
 

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my 4banger wont go past 112 and thats in 5th gear never gets high enough rpms to shift up if using the autoshifter. when not using it will just for gas mileage
 

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I think I have gotten mine to about 93......LMAO. I'm scared to get a speeding ticket....I used to get them on a regular basis!
 

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That's pretty dumb that they rate the top speed solely based on the tire rating. It seems like they would pick tires to match the car, but it certainly isn't beyond the realm of possibility of GM. I've never topped out on my G6, and I will almost certainly never do so if it doesn't have the 118 mph limiter. Mine's a 2006 GT and supposedly came with V rated tires.
 

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The 05 GT came with V rated tires and supposedly it goes up to 135. I've got it to ONLY 125 before backing off.
 
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