Talking about 4WD Launch!!
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Senior User
Joined: Aug 2005
Posts: 197
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From: Gilbertsville, PA
Talking about 4WD Launch!!
I have a 04 F350 supercad, longbed with the bullydog dog pup downloader, intake, 4" MRBP exhaust and 35" mud terrians.
I go down and race at the philly street races all the time and there are some pretty fast cars down there. A neon SRT-4 modded up ask if i would race. I said alright.We line up, I put it in 4WD and I launched truck at about 3k RPM with 34 psi of boost. The whole front end was chirping and I took off. The SRT-4 never even had a chance. He was angry about that one. I had also raced a loaded up mustang, and 2 suberu wrx sci with turbos. None of them had a chance. Every person down there thought I would loose.
Just a little experince with launching my truck in 4 wheel drive, lol
I go down and race at the philly street races all the time and there are some pretty fast cars down there. A neon SRT-4 modded up ask if i would race. I said alright.We line up, I put it in 4WD and I launched truck at about 3k RPM with 34 psi of boost. The whole front end was chirping and I took off. The SRT-4 never even had a chance. He was angry about that one. I had also raced a loaded up mustang, and 2 suberu wrx sci with turbos. None of them had a chance. Every person down there thought I would loose.
Just a little experince with launching my truck in 4 wheel drive, lol
Senior User
Joined: Mar 2005
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From: columbus MS
Holding your torque converter with your brakes above the lockup RPM (1800 RPM??) is just asking to remove parts the 3 second way. These TS tranys are tough, but not that tough. At just below 1800 RMP, you have the turbo already spooling up (it goes from 10 psi to max quickly), and greatly reduce the risk of jacking your trany. Of course, no auto trany likes to be held at any higher RMP without movement for any amount of time, slipping the torque converter builds a lot of heat very quickly.
Last edited by DeesO; Mar 8, 2006 at 08:43 PM.
Senior User
Joined: Nov 2002
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From: chicago
I busted a u joint on a ford with a 351 brake torquing it. I agree, about 1500-1800rpm is ok, but 3k rpm is too much,
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From: Ohio
Could it be........ http://videos.streetfire.net/video/446CB177-29DE-4B5A-97DD-CD20F3C8564D.htm
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From: Ohio
Originally Posted by BigDog83
I didn't even know about the video, someone else must have been recording. It is cool though to see your own truck on the internet.
Beware of what you do and keep it on the track.
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From: Lake Mary, FL
Originally Posted by DeesO
Holding your torque converter with your brakes above the lockup RPM (1800 RPM??) is just asking to remove parts the 3 second way. These TS tranys are tough, but not that tough. At just below 1800 RMP, you have the turbo already spooling up (it goes from 10 psi to max quickly), and greatly reduce the risk of jacking your trany. Of course, no auto trany likes to be held at any higher RMP without movement for any amount of time, slipping the torque converter builds a lot of heat very quickly.
There are a handful of trucks I have direct experience with that have done this very thing at least a few hundred times.
The occasional 4WD launch is fun =o)
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From: Lake Mary, FL
Originally Posted by DeesO
If you don’t mind, I’m curious how long it takes to get to 30 psi of boost (compared to getting to just 10 psi)? I’m not brave enough to hold my past the TC lockup RPM.
DeesO
DeesO
It's easier at the track, where you kow how long you'll have to do it, but timing it in the street races is a little trickier. Every second you pray a little harder it stays together, lol.