BurnOuts!

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Mike Peters · #31 Post by **Mike Peters** » Thu Aug 24, 2006 6:23 am

uptime wrote:What are you doing wrong if the rear of the car drifts ( in my case to the drivers side) when you start your burnout? I have a spool and the car launches straight. I pull into the water, put it in 3rd (th400), push the line-lock button the hit the gas.

Your car may have preload in the suspension which makes it drift during the burnout. However, since the car leaves straight, the preload may be needed to offset the torque during launch or poor distribution of corner weights. I would suggest finding someone with corner scales and weigh the car on level ground. See if there's any glaring differences from side to side or LR/RF and RR/LF ratios. Does the car do this at every track? Some tracks are just not level. What does the car do under heavy braking? Pulling to one side or the other can be a signal the car has preload or poor distribution of weight.

#32 Post by **John_Heard** » Thu Aug 24, 2006 6:45 am

Once the tires get spinning good let off the line lock and roll out with them spinning. Lots of cars will start to get sideways if you just sit there.

Mike Peters · #33 Post by **Mike Peters** » Thu Aug 24, 2006 7:09 am

Beyond wrote:Once the tires get spinning good let off the line lock and roll out with them spinning. Lots of cars will start to get sideways if you just sit there.

Yes, I agree but, don't be too helpful John. Not good to let all secrets out for everyone to see. I prefer my competitors to sit in one spot and roast them. 8) You're too nice. :)

#34 Post by **John_Heard** » Thu Aug 24, 2006 7:28 am

Ah... but if you tell everything nobody will know when you're feeding them a line of BS LOL

79 Camaro · #35 Post by **79 Camaro** » Thu Aug 24, 2006 9:12 am

Beyond wrote:Ah... but if you tell everything nobody will know when you're feeding them a line of BS LOL

Thanks for the Heads-up on that one. I will be sure to watch you and Mike a little closer.

Mike Peters · #36 Post by **Mike Peters** » Thu Aug 24, 2006 9:34 am

Don't watch me. I'm a newbie and am going to be in way over my head with this new car.

I haven't been down the track in years.

79 Camaro · #37 Post by **79 Camaro** » Thu Aug 24, 2006 9:42 am

We will see about that Mike.

In the meantime I am keeping an EYE on you buddy. LOL

JohnDougherty · #38 Post by **JohnDougherty** » Thu Aug 24, 2006 11:16 am

A burnout no - no

http://videos.streetfire.net/video/0A87 ... A746F0.htm

a1elec · #39 Post by **a1elec** » Thu Aug 24, 2006 12:42 pm

i just talked to a trans guy and he said 3rd gear is a no no. he said third gear is the weakest part of the trans.

#40 Post by **John_Heard** » Thu Aug 24, 2006 12:52 pm

For a TH350? Don't know about those, I know for sure all the top trans guys say high gear for glides and TH400's.

DriveWFO · #41 Post by **DriveWFO** » Thu Aug 24, 2006 1:49 pm

a1elec wrote:i just talked to a trans guy and he said 3rd gear is a no no. he said third gear is the weakest part of the trans.

Two guys on another web forum start their burnouts in 3rd gear (manual valve body, TH350). I personally always thought that would be hard on 3rd gear starting out like that???

My plan was to start in 1st, get tires spinning, quickly get into 2nd, then 3rd, release line-lock and roll out. This seems to be the general concensus for TH350 burnouts.

julven · #42 Post by **julven** » Thu Aug 24, 2006 3:14 pm

The weakest part of a th350 is second gear. I have blown that second gear sprag in every 350 I have had even the good hardened ones. So I would do everything I could to stay out of second gear on a th350.My dad is not here to ask but I am pretty sure a 400 and 350 are built the same as far as design . So I would do a third gear burn with a th350. JW now makes a sprag and drum that is the same element as a 400 that goes in a 350 to fix this.Jason

DriveWFO · #43 Post by **DriveWFO** » Thu Aug 24, 2006 4:15 pm

What exactly is a sprag???

hsutton · #44 Post by **hsutton** » Thu Aug 24, 2006 6:10 pm

a1elec wrote:i just talked to a trans guy and he said 3rd gear is a no no. he said third gear is the weakest part of the trans.

A real no no is trying to come out in second and suddenly hooking up. This will almost surely take out the intermediate sprag in either a 400 Turbo or 350 Turbo. Some trans guys say to "only burn out in high" as it eliminates the hit on the sprag.

hsutton · #45 Post by **hsutton** » Thu Aug 24, 2006 6:16 pm

julven wrote:The weakest part of a th350 is second gear. I have blown that second gear sprag in every 350 I have had even the good hardened ones. So I would do everything I could to stay out of second gear on a th350.My dad is not here to ask but I am pretty sure a 400 and 350 are built the same as far as design . So I would do a third gear burn with a th350. JW now makes a sprag and drum that is the same element as a 400 that goes in a 350 to fix this.Jason

The intermediate sprag is the weakest part of any of the three speed transmissions. They are all basically of the same design and date back to 1955 or 56. Turbos, Torqueflites, Ford C4s and C6s are basically the same designs. ATI has a Turbo 350 which they claim can handle 1400 H.P. I frankly have my doubts about that one but my son had one in at about the 900 H.P. level and it held up fine.

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