First, I don't know what kind of tires came on my car. But I do have a 150MPH speedo, if that means anything. But today I got it on a straightaway and a was laying into it and it felt like I hit a fuel cutout or something around 115. Could I have one of those governers, and what do I do to remove it?

 

You have a formula, so I would want to say no, although I do know that the tire rating was typically a determinant in which setup you had. Are you on an A4 or M6? if on M6, try downshifting, maybe it's just lack of power in that 6th gear. If it seems to be stopping for sure though, the only way to get rid of it is to get an interface with your computer (hypertech, LT1 edit, etc.) to turn that thing off.

 

Yes, I have an M6, but when I was doing this I was in 5th, not 6th.

 

Yes, formulas still came with the Goodyear Eagle GA tires so some have speed limiters, mine did.

Look at your door stickers what tire size di it come with 235/55?

 

You were in 5th gear at just over 100? Make sure you shift at 5700rpms in future so that you don't lose any races because 4th will do just over 130mph. My formula came with a 115 speedo and the top speed limiter was set at 107mph. When i got my tuning from PCMFORLESS i had it removed for good. Done 170+ since.

 

If you did not buy it new, there is a possiblity that the cluster was changed out. RPO QLC is normally the one for the Z rated Goodyears that would have come on it. You might look for it on your RPO code sticker in the glovebox.

'68 Coronet R/T...interesting.

 

They can have the 155mph cluster and have a speed limiter.

 

Well, last night I went out and looked at the tire codes on the door...it came with 235/55s....poopsticks. I guess I'll just have to get rid of that...

 

Drop me a line if you need any help with removing the limiter.