Can a brake stand launch cause harm? - Diesel Forum

ZAZBEAM · 08-12-2006, 07:23 PM

Just wondering to what extent I am hurting my truck when I stand on the brakes while building boost for quick launch in 2wd? Thaks fellas...

pajuis · 08-12-2006, 07:30 PM

You are over working the engine, transmission, driveshaft, engine mounts, and torque converter. You will experience premature wear from these components, but probably your torque converter first. Takes off like a bullet though.
Good luck.

STG · 08-13-2006, 01:00 AM

It won't hurt a thing. Really. Please remember to post pictures of the carnage here.

GregH · 08-13-2006, 09:09 AM

Let me tell you a little story about torque braking... Another technician took a stock unit out on a test drive after being royally screwed by the sales department and Ford warranty. During his test drive, he came to a hill in a development area. He torques it up at the bottom of the hill, gets the rear wheels spinning at about 40 mph, and then eases off the brake enough to let the truck roll forward. He then saws the wheel back and forth to make these huge "S" shaped marks in the road - shoulder to shoulder, 100 yards up the hill. It was a constant wheelspin for about 45 seconds. Then, he turns around at the top of the hill, lines up the rear tires to go through the center of the "S", and then spins down them in a straight line. Result, two 100 yard tall dollar signs, about 3/4 tread gone from the rear tires, and cooked rear brakes. The truck was then sold, and the new owner experienced no problems from it.

Another brake torque that ended badly was on an F-150. Stall speed was being checked in the shop, and it was consistantly high from slipping apply components. The technician doing the stall test didn't understand the importance of letting things cool sufficiently, and was only giving the truck about 2 minutes between each test. On the third stall test, the front seal blew, and sprayed transmission fluid out of the bellhousing with enough force to bow the inspection cover. The fluid hits the floor, splashes up onto the catalytic convertors, and flashes. 5 fire extinguishers later, we've got a totalled truck. No grille, no front tires, hole in the hood, broken windshield, etc. The flames went 6 feet above the open hood. Our insurance paid for a new truck....

So, be careful with brake stands, or torque braking. The platform is designed to handle alot - and I mean ALOT - but, the cost of failure is extremely high...

ford_doctor · 08-13-2006, 10:12 AM

ROFLMAO! Thanx Greg, I needed a good laugh.

FINE69 · 08-13-2006, 11:48 AM

[ QUOTE ]
Let me tell you a little story about torque braking... Another technician took a stock unit out on a test drive after being royally screwed by the sales department and Ford warranty. During his test drive, he came to a hill in a development area. He torques it up at the bottom of the hill, gets the rear wheels spinning at about 40 mph, and then eases off the brake enough to let the truck roll forward. He then saws the wheel back and forth to make these huge "S" shaped marks in the road - shoulder to shoulder, 100 yards up the hill. It was a constant wheelspin for about 45 seconds. Then, he turns around at the top of the hill, lines up the rear tires to go through the center of the "S", and then spins down them in a straight line. Result, two 100 yard tall dollar signs, about 3/4 tread gone from the rear tires, and cooked rear brakes. The truck was then sold, and the new owner experienced no problems from it.

So, be careful with brake stands, or torque braking. The platform is designed to handle alot - and I mean ALOT - but, the cost of failure is extremely high...

[/ QUOTE ]

And you tech's wander why people refer to dealerships as "stealerships" If I caught ANYONE from a stealership doing that in my truck, they would be looking for their teeth! [img]/ubbthreads/images/graemlins/mad.gif[/img]

NFA_Fun · 08-13-2006, 03:42 PM

Any pictures of the tire marks?

i6DZUL · 08-13-2006, 07:17 PM

The intelligence level is as visible as the fuel level in the sight glass on the fuel tank. Seriously though man, drop it down in 4wd and for a really good show. As someone else suggested, post pics of the "fun".

pajuis · 08-14-2006, 01:55 AM

Greg,
Did you have fun when you did that?

GregH · 08-14-2006, 06:17 AM

Hang on.... I don't claim responsibility for either of these incidents...

I was involved in the repair of the first truck.

I did help put the fire out on the second truck.

And, in the dealership's defense, the first truck didn't belong to a customer at the time of the test drive.

Now, there was that 06 mustang - sold unit - that saw a wild test drive during a pre-delivery inspection... but that ma be for another day.

Should I just keep these stories to myself?

rickeg · 08-14-2006, 11:16 AM

No, it's awesome.

pajuis · 08-14-2006, 12:01 PM

Just giving you a hard time! Keep them coming!

Tallavana · 08-14-2006, 01:55 PM

I have a question concerning this post. I drove my friends 6.0 and his was a dog off the line. My 7.3 will litterally burn circles around his. We tried every kind of launch and it will not break the tires free. You can hold the brake and WOT and it just sits there. Once you let off the brake, it starts going but really picks up after the first 30ft or so. I was expecting a little more wow. If you step on it from a dead stop with no brake, its like "yawn" for the first couple of seconds. It has plenty of power while driving, but it definitely has no get up and go. Is this normal or is he having some sort of problem. It is a stock 05. From the previous post, it sounds like a stock 6 has no problem lighting them up.

njmjc · 08-14-2006, 02:11 PM

"what extent I am hurting"

The only thing that hurts me is my ego not doing at least 75 feet of duel black marks! [img]/ubbthreads/images/graemlins/smile.gif[/img]

2006KR · 08-14-2006, 02:12 PM

This thread brings back an interesting event about 6 months ago. Got stuck behind some #$%ass at a red light. He just sat and sat and acted like his car wouldn't start, then about the time the light changed to yellow, off he went, around the corner. Well, by that time, I was fuming (not really sure why), but I clamped down on the brake, and about the time I saw the cross light turn yellow, I tromped it. I felt my brake peddle slowly going lower and lower, and all of a sudden, the back tires started to spin .... whoo-we, a dually spinning tires no less. About the time I thought I would have to dump boost, the light turned green .... all the way across the intersection - 4 black lines. The dude in his ricer next to me was still sitting there when I had to brake to turn in to a eatery. Don't know that I would do it again, but knowing that I have the oomph kinda boosts one up a notch.

Larry