100 mph Governor

[Mikejonce]

Hi all,

 

Does anyone know about the speed governor on the 2014 Silverado 1500? I have some performance upgrades on my truck and I was on the hwy last night and realized it cut me off at 100. I couldn't accelerate anymore.

[txchevy4ever]

Yep, that's it. That's all the truck is designed to do. Please don't drive that way on public roads, you're risking other's lives.

[johnhankel]

I hope you never drive through Nebraska.

[pm26]

Installing a muffler with a 10 inch diameter outlet pipe will take care of everything.

[NoProblem]

Yes, that's what these trucks are governed at.

[SILVER SLED]

You will have to tune the governer out. What upgrades did you do without a tune? I can't see any performance upgrades doing any good with out a tune.

[POS VETT]

It's actually 98 mph.

[BBRU]

Watch out, you will get scolded for wanting to take the speed limiter out...... But yes, you will have to tune it to take it out.

[pm26]

The most important "performance upgrade" , if you insist on driving driving your truck at insane speeds, are good quality high speed rated tires. And those are not supplied by GM with your stock truck. And that's also one reason for the top speed limiter. Typically, GM will not limit top speed on vehicles equipped with a handling suspension and high speed capability tires.

[1MOGAN]

98mph...not w/o a tune.

[Mikejonce]

Ah yes. Diablo Trinity T-1000 Tuner. Running 91' Octane Tune. Silly post, I should have just done my research to delete the limiter. Sonoma Raceway here I come! Or maybe Stockton...it's closer. Anybody here do the Wednesday night drags? That said, no more street/hwy smashing you guys...I promise! Safety first.

[SILVER SLED]

125 mph with a tune. The only speed limiter is two things between my legs.

[CoasterCOG]

Other than the tire speed rating the other thing to consider taking the truck over 100 is the drive shaft.

[CounterMeasure]

Other than the tire speed rating the other thing to consider taking the truck over 100 is the drive shaft.

 

I've often wondered about this one, and would love some insight. Not to say I'd do it (because I rarely tow anything), if the truck is rated to tow/haul X pounds up to say 70mph, which is 70% of the govenor'ed speed, then why would the driveshaft be a problem at a higher empty weight speeds? It is it because of increased revolutions? Because it would be under less directional stress empty at 110mph than towing double its weight at 65 or 70mph.

 

Edit: To be perfectly clear, I am not supporting driving that fast, or defending the driveshaft, just merely looking for education on what the real concern is.

[Chris]

I cant even count how many times i have seen this topic of discussion on just this generation of trucks. GM has been using the same limiter speed for years. They have also been using the same tires for years. And as for the driveshaft, the shadt itself isnt the issue, it is the needle bearings in the universal joints. Very small and can not tolerate heat well. Increased RPMs on them will cause them to heat, distort, and eventually seize. Once that happens the driveshaft breaks free and becomes a hazard to you or other drivers.