Can’t get over 105 miles a hour

[theblet]

You obviously don't hang out with the same group of car guys as I do. I get left behind with the factory speed limiter on most cruises

Y’all not cruising, sounds like cannonball!

 

[Shots]

....Manufactures don't want people to drive too fast and die because a part of their car\truck broke at speed. Obviously cars\trucks can go much faster then the limiter but other parts may go, tires, drive shaft, etc.
Image this headline
"Supercharged TRX driver dies second week of ownership on the racetrack going 120mph because a the driveshaft snapped in a completely unmodified truck."

Wouldn't look very good for the manufacturer.
...

He mentioned specific MPH for what he thought was the limiting factor for the driveshaft. There is no other way to interpret that

Maybe I'm looking at it different, but he mentions the manufacturer not wanting people to die because a random part failed (..."tires, drive shaft, etc"...) then goes on to give a theoretical headline that would look bad on the brand. Yes there was a specific speed and part stated, but the context to me suggested it was just an example not a specific claim that the given part was rated for a given speed.
Maybe I should look at it more literal, but due to the rest of the message I didn't take it that way.

 

[Shots]

Y’all not cruising, sounds like cannonball!

LOL please tell me someone in that "cruise" is driving a fake ambulance to avoid being pulled over.

 

[Eighty]

Maybe I'm looking at it different, but he mentions the manufacturer not wanting people to die because a random part failed (..."tires, drive shaft, etc"...) then goes on to give a theoretical headline that would look bad on the brand. Yes there was a specific speed and part stated, but the context to me suggested it was just an example not a specific claim that the given part was rated for a given speed.
Maybe I should look at it more literal, but due to the rest of the message I didn't take it that way.

Yes, he gave a sample scenario. And my specific response was intended to be a general rebuttal for the TRX. It is built for racing and hard core Baja runs. So I’m not remotely concerned about a weak component flying apart on a 100+mph run.
The peasant DT trucks, on the other hand…well, keep the shiny side up folks.

 

[Rlaf75]

LOL please tell me someone in that "cruise" is driving a fake ambulance to avoid being pulled over.

Maybe there's a couple priests in a Ferrari too lol

 

[HSKR R/T]

Y’all not cruising, sounds like cannonball!

We enjoy our vehicles and using all the llama thrusts available

 

[HSKR R/T]

Maybe I'm looking at it different, but he mentions the manufacturer not wanting people to die because a random part failed (..."tires, drive shaft, etc"...) then goes on to give a theoretical headline that would look bad on the brand. Yes there was a specific speed and part stated, but the context to me suggested it was just an example not a specific claim that the given part was rated for a given speed.
Maybe I should look at it more literal, but due to the rest of the message I didn't take it that way.

You didn't quote his post that I was replying to. He specifically said he recalled hearing that the driveshaft was limited by specific MPH.

 

[Shots]

You didn't quote his post that I was replying to. He specifically said he recalled hearing that the driveshaft was limited by specific MPH.

Oooohhhh, well there's the confusion. My apologies. I thought you were talking about the example, and just quoted the most recent post on the topic. Which is why I quoted that same section about the example in post #29 when I originally said I thought he was just making a random example.
See there, I should have read it more literally, and taken it specifically as response to post #26.
Oops. So on that topic, aren't they limited by rpm? Obviously you can reach the same rpm at different speeds depending on gearing, so that would make sense that the drive shaft is not a speed limited part.

 

[HSKR R/T]

Oooohhhh, well there's the confusion. My apologies. I thought you were talking about the example, and just quoted the most recent post on the topic. Which is why I quoted that same section about the example in post #29 when I originally said I thought he was just making a random example.
See there, I should have read it more literally, and taken it specifically as response to post #26.
Oops. So on that topic, aren't they limited by rpm? Obviously you can reach the same rpm at different speeds depending on gearing, so that would make sense that the drive shaft is not a speed limited part.

Yes, it would have to be RPM based, on the driveshaft itself, not engine RPM. But a properly balanced driveshaft shouldn't really have any issues at any speed/RPM. The u-joints, maybe, if the angles weren't correct. The torque when accelerating would be more on an issue than speed/RPM. Which is why there is torque limiting programmed into the tune during shifts.

 

[AV8OR]

If there is no limiter and with enough horsepower somewhere you are going to get into aerodynamic issues.

Once you find that point I’m afraid you won’t be around to post the speed you achieved.

Best of luck expanding the envelope.

 

[theblet]

If there is no limiter and with enough horsepower somewhere you are going to get into aerodynamic issues.

Once you find that point I’m afraid you won’t be around to post the speed you achieved.

Best of luck expanding the envelope.

That thing was flying! Awesome car

 

[HSKR R/T]

If there is no limiter and with enough horsepower somewhere you are going to get into aerodynamic issues.

Once you find that point I’m afraid you won’t be around to post the speed you achieved.

Best of luck expanding the envelope.

Would take a LOT of horsepower to overcome the aero drag of these trucks to where stability becomes an issue. At which point, anyone trying to go that fast has hopefully addressed down force

 

[GMetal]

Whats the RPMs of the driveshaft at those speeds?

Driveshaft Critical Speed

Calculate Driveshaft Critical Speed - by Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules!

wallaceracing.com

Spicer Critical Speed RPM Calculator

Calculate the optimal operating revolutions per minute of your driveshaft based on the style of the driveshaft and specific measurements with the Spicer Critical Speed RPM Calculator.

spicerparts.com

 

[Dewey]

That thing was flying! Awesome car

It would have been even more awesome if the Challenger cop car chased him down and caught him.

 

[crusher]

Would take a LOT of horsepower to overcome the aero drag of these trucks to where stability becomes an issue. At which point, anyone trying to go that fast has hopefully addressed down force

not if you have avoid something, its just not made for that

 

[Dewey]

Yikes

It went into ECO mode at the end

 

[theblet]

Yikes

It went into ECO mode at the end

They might have been on a dyno or had the rear end jack up lol

 

[AV8OR]

It should be “easy math” to figure out the top end on any car / truck with unlimited horsepower.

Red Line RPM x transmission top gear RPM x rear axel ratio x rear wheel diameter = top speed.

 

[AV8OR]

That thing was flying! Awesome car

Part of the stunt was to prove no matter what speed you are going you will still get charged for using the toll road.

Toll tag or no toll tag.

 

[Dewey]

They might have been on a dyno or had the rear end jack up lol

Doesn’t sound like it from reading comments.

He also posted these tidbits of info….