Re: Burnouts,exploding trannys and lauch proceedure
[Re: maximum entropy]
#987209
05/07/11 06:08 PM
05/07/11 06:08 PM
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Joined: Jan 2003
Posts: 26,538 Rio Linda, CA
John_Kunkel
Too Many Posts
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Joined: Jan 2003
Posts: 26,538
Rio Linda, CA
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Quote:
i'm with remcharger on this. anything you can do to protect the sprag should be implemented. manual low may seem redundant if it jumps right into second, but weird things happen. a lot of stuff blows up in the burnout box.
Yep, and it's not always the first incorrect burnout or the second or....but it's the accumulated abuse of the sprag that can eventually lead to failure.
Simply stated, spinning the tires in water doesn't fully load the sprag, if the sprag doesn't see a load at the rear wheels the rollers won't fully seat and partially seated rollers can skid and get flat spots worn on them leading to failure.
The INTERNET, the MISinformation superhighway
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: fishy340]
#987211
05/07/11 09:03 PM
05/07/11 09:03 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
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So, curious.... exactly what WILL it hurt by starting the tires turning in 1st before going to second? Is it the gear change unloaded? (Explain this to me like I'm the village idiot)
My car is a low 12-second street car with a TF-2 kit. I pretty much shift it manually all the time though. The way I understand it, by engaging 1st gear manually, I am applying the low gear band. It seems that this would only make things stronger... (????). Why is this not true?
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: Twostick]
#987213
05/07/11 10:30 PM
05/07/11 10:30 PM
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Joined: Nov 2004
Posts: 4,330 Lynchburg, VA
Leon441
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Doc Fiberglass I don't know that your drilled drum is any more dangerous than a stock one. Here is my theory... The surface of the drum is lighter and therefore may not have as much force trying to throw it apart upon a sprag failure.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: Leon441]
#987214
05/07/11 10:37 PM
05/07/11 10:37 PM
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Joined: Nov 2004
Posts: 4,330 Lynchburg, VA
Leon441
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As far as I know the only Valve Bodies that do not apply the band in low gear are aftermarket race versions that deleted this function.
If I were running a "Shift Kit Valve body" I would probably start in 2nd as Pbody suggested. The reason right or wrong is your trans is still going to start off in 1st no matter what you do. So at least it will cause the sprag to seat the rollers where if you are in low, you are applying the band and not seating the sprag. A manual rear band apply valve body would be a better route. A few hundred for a front drum that will not blow, even better. I would say a low power combo may not be threatened by a sprag failure, BUT.... I have seen a 4WD pickup out playing in the mud blow a tranny up. So it can happen. A blanket can be used but you will still bend up the floor board.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: moparacer]
#987217
05/08/11 01:30 AM
05/08/11 01:30 AM
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Joined: Nov 2010
Posts: 914 tn
robnbird
super stock
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super stock
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tn
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Quote:
On the burnout, start in second and shift to high, come out of the water and don't let the tires grab hard...
Pretty much it...
this is correct. your trans will live by it.
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: robnbird]
#987218
05/08/11 04:36 AM
05/08/11 04:36 AM
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Joined: Aug 2004
Posts: 214 Hamburg / Germany
Den300
enthusiast
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enthusiast
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Hamburg / Germany
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I use the Cope Pro Street Automatic valve Body with Low Band Apply and asked Cope in what ear to burn. His answer: First. Maybe it depends on the valve body?
Hamburg/Germany
69 Chrysler 300 446cui Dual Quad 12.64 @ 110.7
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: FurryStump]
#987220
05/08/11 09:55 PM
05/08/11 09:55 PM
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Joined: Mar 2005
Posts: 230
DragtimeDodge
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I published an article on The Dragtime News about the 'burnouts' part of this question. You can find "Burnouts 101: Heat Your Tires Without Beating Your Parts" halfway down on the Home page.
Last edited by DragtimeDodge; 05/08/11 09:58 PM.
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: DragtimeDodge]
#987221
05/08/11 11:49 PM
05/08/11 11:49 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
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Quote:
I published an article on The Dragtime News about the 'burnouts' part of this question. You can find "Burnouts 101: Heat Your Tires Without Beating Your Parts" halfway down on the Home page.
" Every vehicle is unique. Once you learn what the vehicle requires, operate on the minimal side". Some good points in the article. We over do the burn-outs ( agree )- Of course we all aren't running MT tires ether, and all tracks arent prepped the same. My 1,2,3 and roll out of the water works real good for me and my set up. My car shifts automaticaly ( in drive) from first to 3rd within around 2 seconds ( still in the water ). I'm usually off the line lock in about 4 seconds and I'm usually done around 6 seconds or less. Never have to go full throttle and I'm off the pedal and in neutral just before the car comes to a stop. Since my car shifts automatically in drive, it's just one less thing I have to do ( shift )during a burn out, and it makes them just that much more repeatable. As I said in a previous post in this thread, this is just how I do it. I'm comfortable with it and I think my drive train is too.
Fastest 300
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: Den300]
#987222
05/09/11 12:18 AM
05/09/11 12:18 AM
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Joined: Nov 2010
Posts: 914 tn
robnbird
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: StealthWedge67]
#987223
05/09/11 01:52 AM
05/09/11 01:52 AM
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Joined: May 2007
Posts: 446 oregon
savoyracer
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mopar
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oregon
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Quote:
So, curious.... exactly what WILL it hurt by starting the tires turning in 1st before going to second? .......YOUR FEET !!
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Re: Burnouts,exploding trannys and lauch proceedure
[Re: Mopar-Al]
#987227
05/10/11 09:44 PM
05/10/11 09:44 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
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Quote:
Seems everyone says to do your heat up in the water box. I don't think anyone goes 1st 2nd and 3rd in the water. You pull in , spin the tires over once, pull out of the water box, then proceed to heat the tires up. If you do your burn out in the water box, then your wheel tubs can drip water down on the track and your tires, causing havok. I believe most everyone that made a post in your thread does this, but are not making it clear for you. It also does not take long to heat a tire up. Only 5 or 6 seconds usually gets them sticky and soft.
I have yet to run accross a starter that stops you in the water to do a burn out. He doesn't care about your wheel wells dripping water, but he sure doesn't want any water outside the box on his track. That being said, I always double check where he stops me to do a burnout with a reference point along the track ( sign on the fence, etc ). First thing I do when racing at a new track - besides watching how the starter is lining up cars. As I have said, my burnout takes about 6 seconds - and there is a video somewhere in this thread that proves it
Fastest 300
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