Any help I have a 91 rs camaro with a305 I just replaced the Rearend an put 3.73 with position. Here's the problem at 110 my car bogs down like it has a governor on it.Any help with this I'm stumped everything was fine until I changed the gears. Or is it that the tbi can't keep up .

 

possibly an rpm deal with the speed. there is a limiter on it. what are the rpm's when you get to 110. if it was stock then i am sure it is a lot higher with 3.73 from the 2.73

 

OK. Thanks ill check the rpm's tomorrow morning an ill get back to you on that.but if that's the case what should I do. A.replace the distributor or B.the throttle body.

 

chances are good its the gov. my other z28 had 373 gears and it wouldnt go past 80 ish because it thought it was going 110. im sure your in the same situation. just have it disabled with a tune.

 

That's sounds right to me the speedometers did change after that. You think I should go aftermarket with a distributor an change to a carburetor

 

get a custom tuned chip. brian at tbichips can get you one. it will be a generic type tune but it will get everything squared away. unless you want to purchase a cable, tuning software ( free i think) and an ebl flash ecm and start learning.

 

Did you change anything to get the speedo accurate?
These cars are known to have a speed limited program in the ecm, its because they came w/ low speed rated tires.

 

Naw I just did the gears last week. An hadn't really pushed it until the other day an notice it. How can I get the speedometers accurate because I'm barely on the gas when the speedometers hits 110 an I have more pedal room so I'm not going that fast. I can't even race anything on the freewaygas because of it.

 

its because the buffer box is seeing the wrong revolutions. call brian at tbichips and ask him.

 

Definitely hitting the vehicle speed limiter. See the sticky's on the transmission board here for a how-to on changing the VSS gear(s) in the tranny. There is a sticky specifically for the 700R4 trans VSS gears.

RBob.

 

Thanks everybody I really needed the info.I'm gonna check the stickys

 

No need to spend crazy $$$ on a custom tuned chip for just defeating the speed limiter. You can defeat the speed limiter for like $2 & have it work only when you want to or be limited if anyone else drives your car (son/daughter/valet/mechanic).
http://www.austinthirdgen.org/index.php?pid=7

 

Honestly I don't care about knowing exact speed I just go by other people on the freeway.I just want this limiter off completely for 2 bucks that's beautiful. Whatever that's stock that's causing it I want to remove it an make a table weight with it.

 

Theres no good reason whatsoever for a TBI car to be at 110 MPH.

 

I've heard that people go dumb fast out west -100 could be considered just keeping up

 

I don't see how that helped any inferno

 

I want to change to a Carb anyway so would that cancel out the rev limiter.

 

Be careful what you wish for. With a carb you'd lose tunability (power, MPG) and you'd have to fab a lockup switch for the transmission, as it would no longer lock up in 4th gear due to the absence of the electronics necessary to tune it. If you plan on staying with the 305 or going with a 350 it would be a good move to keep the TBI and tune with a chip or EBL Flash ( www.dynamicefi.com )

 

The limited speed was because of the speed rating of the tires on that came stock on TBI equipped cars. It was for your safety, not because GM was being mean.

So yes, there WAS a good reason.....To save yours & others that were crashed into, lives. So don't go defeating your speed limiter until AFTER you have the appropriate tires.

 

Ok so changing the chip would fix the problem

 

That would be the more expensive way to do it but yeah..Sure...A reprogrammed chip will fix it.

 

Save your money and put it towards EBL Flash- chips are expensive and won't allow you to accommodate for your mods

 

What an where do iI find a Ebl flash at.

 

www.dynamicefi.com

 

If it helped save an innocent pedestrian or family you run over driving like an idiot then it would help a lot more than turning the speed limiter off. It's all about perspective.

Top speed runs are for salt flats, and going 110 mph is a 1/4 mile track day goal, not something you do on public roads.

 

He's not going 110. He went from 2.73 gears to 3.73's, that's what he's talking about

 

a chip is going to be 125

 

Yeah, whats w/ that crack about "no good reason whatsoever for a tbi car"? You can say the same about any engine, just because it was simplier efi system doesn't mean it can't perform. I'll betcha alot of guys don't put z rated tires on their tpi z28s at the time to change them.

 

Thanks ron.theres always someone law abiding gear head that has something to say an I bet infernal isn't driving with a v6 or v4