I am sure this has been asked somewhere, but I am short on time to do a good search. He is the deal I have a 91firebird 305TBI, I put new gears in the rear and now it hits the speed limiter while running the quartermile. I know the right way to fix it is to change the speedo gears in the trans. But I want to race it tomarrow, is there any way to just unhook the speedo so it wont hit 115mph and shut me down. I am only actually doing 86mph in case anyone was wondering. Thanks

 

Set the speed limit at 250mph in the .bin is the quickest.

 

just unhook it from the speed sensor was what i was told before if the car can see how fast its going it cant shut the fuel off.

ive heard of guys actually cutting the wiring and running it up into the console on a switch where if they wanted to burn some miles up they just hit the switch the speedometer dies and they can stand on it to there hearts desire and when done flip the switch back on and the speedometer comes back to life, (this will throw a trouble code for speedo though)

 

Why would you go trough such hassle if you can just change the speed limit in the bin.
TCC lock up is controled by ecm with the speed sensor's output for some situations, another good reason to set the limit in the bin.

 

Yeah, there's not a way of doing what you want to do without a chip that's really worth the effort. You and your car will be happier 2 weeks from now if you don't bother with the wiring mess.

If you don't burn your own chips, $100 or so will get you one from TBIchips.com, and if you tell the guy what's up with your gears and such, he can recalibrate your speedometer where it's correct and take care of the limiter issue as well. I've got a couple of his chips and he's knowledgeable. That's what I would do. Tell whoever you'll race them in a couple weeks.

 

No. For that you need the proper driven gear on the VSS.