rick57

I went to a Mustang show and saw a guy that said he had the limiter taken off
and went from 180 hp at the wheeels to 245 on the dyno and ran it to 140mph with the stock driveshaft.
He also said that the limiter is only there because the law demands it to be on the car for all v6.

any Opinions. ?
the only mod I want to do is take off the limiter and maybe a slight tune for hp.
Would be nice to do without a driveshaft change but I dont want to risk it unless I hear others doing it and not having problems

David Young

What year v6 Mustang are you talking about?
A 2011+ v6 Mustang should dyno 245+ hp, 100% stock.
Very few factory driveshafts have exploded.
I have and aluminum driveshaft on my 2011 v6 Mustang

SpectreH

I'll add that the law has nothing to do with the speed limiter. Sometimes that limit is chosen due to the speed rating of the OEM tires.

killaz05

Also depends on what set of rear end gears he has. 2.73 gears felt fine at 120 but with 3.73 gears... not so much.

kylerohde

Ummm...unless something has changed, the V6 is limited because the stock driveshaft tends to do this at higher speeds:


Am I remembering wrong?

rick57

I have a 2014 performance package all stock

rick57

I have seen and heard the drive shaft video and others thats why im asking other opinions.
I dont quite trust what I heard but its also on his sign about the hp and speed of 140mph

rick57

his is also a 2014 but I dont know if its a standard or pony. I dont think its a Performace Package because the tower brace is red like the car \. It says a roush exhaust. cold air. and a lund tune.
said on the sign dynoed 245 hp at the wheels and 140 mph with stock driveshaft

killaz05

I would play it safe. I know I wouldn't push my car past 120 with 3.73 gears in my 2014. I can feel the entire car shake from beneath me. MPT who I bought my tune from asks if you have the stock driveshaft and will put a limiter in the tune they send you if you have the stock driveshaft. Same with AmericanMuscle I believe. 245hp seems a bit low to me with those mods but I could be wrong.

Siber Express

You are remembering wrong, the limiter is figured in to the car on the lowest speed rating for tires, IE 117 MPH on the 17" Michelin's and BFG's.
The Speed limiter on my truck is 98, pretty sure that has nothing to do with the driveshaft, but if you check the speed ratings on the 17" F150 tires it will show up at 98 MPH.

kylerohde

Your truck and V6 Mustangs aren't the same: https://www.google.com/amp/jalopnik....-exploding/amp

Siber Express

You are correct, my truck can carry the Mustang on a trailer, where the Mustang cannot Pull the trailer with the F150 on it very easy.
Now the Point I was Making is the Michelin Energy Saver Tires are a T speed Rating, 118 MPH speed rated tire, therefore the speed limiter for the V6 is set for that. The lowest Speed rating for the GT is 144 and I do believe that is where it is set at.
The Stock F150 17 inch tire is 98 speed rating therefore that is where it is at, that was the only thing I was comparing, not the vehicle, just the reason the speed limiters are set where they are.
Ford never drove the Mustang up to see where the driveshaft came apart and set it for 20 MPH less. The driveshaft is not the Limiter on the V6, the tires are no matter what people say.

kylerohde

Sorry, I think you're wrong:
http://www.autoblog.com/2011/12/19/w...ails-at-135-m/

http://v6mustangperformance.com/tips...shaft-failure/

Siber Express

You can put up videos and links all day long of cars with the limiter off and the shaft failing, but none address the original reason why the V6 was limited to 117, Speed ratings on the tires. Same reason why my Mazda3 non speed was limited to 117, T speed rated tires. I don't think I was going to have Driveshaft failures in it

kylerohde

Did you actually read the Autoblog article I linked to? The reporting + Ford statement say it is the driveshaft they used to get the best MPG. I'm guessing they decided 30+ MPG highway was more important than a top speed 95% of owners were never going to approach.

WhiteBird00

Yes, they were more interested in mileage than achieving a top speed almost nobody would ever attempt but that still has nothing to do with why Ford set the speed limiter as they did. Do you really think they went out and tested drive shafts until they failed and then set the limiter based on that? Of course not. They set the limiter based on the tires and then installed a drive shaft (and probably other components as well) that they knew would work at least up to the limit mandated by the tires. Besides, why would they pick the 112 mph limit if drive shafts fail at 135 mph? They could have set it at 120, installed U rated tires and still had a safety margin.

5.M0NSTER

I think you're both right.

First priority will of course be making sure the tires don't fail at high speeds. But I bet the fact that the driveshaft explode at 130mph+ was not lost on ford. They don't even have to test it. Some simple math is enough to calculate the max rotation speed.

So it this case Ford was able to kill 2 birds with one stone.

kylerohde

Makes sense. Didn't mean to be so defensive about it but this board is dead lately so I had nothing else to talk about!

TheReaper

FYI Kyle, never argue with a V6 owner.