IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Torque Braking for Launch - Damage to vehicle?

Thread Tools
 
Search this Thread
 
Old 05-26-09, 11:11 AM
  #1  
mdgrwl
Lexus Champion
Thread Starter
iTrader: (7)
 
mdgrwl's Avatar
 
Join Date: Feb 2009
Location: NJ
Posts: 1,871
Likes: 0
Received 1 Like on 1 Post
Default Torque Braking for Launch - Damage to vehicle?

Any damage being done to the car by torque braking for launches? Or possibly just speeding up the wear of wear parts?

Or is it absolutley fine and I'm an idiot for posting this stupid question?

Also... what have you found the best RPM to take your foot off the brake at?
I'm still trying to find my sweet spot because it seems anything 2K or higher I'm spinning my wheels and going nowhere at the jump.
Old 05-26-09, 12:59 PM
  #2  
caymandive
11 Second Club

iTrader: (2)
 
caymandive's Avatar
 
Join Date: Dec 2005
Location: N.Va
Posts: 4,066
Received 72 Likes on 35 Posts
Default

1100-1300 rpm seemed to be the sweet spot at the drag strip. You just have to play around with it, but I can assure you higher is not better in this car with stock components.
Old 05-26-09, 01:18 PM
  #3  
mdgrwl
Lexus Champion
Thread Starter
iTrader: (7)
 
mdgrwl's Avatar
 
Join Date: Feb 2009
Location: NJ
Posts: 1,871
Likes: 0
Received 1 Like on 1 Post
Default

^^ Thanks.... any damage to the car though?
Old 05-26-09, 01:42 PM
  #4  
caymandive
11 Second Club

iTrader: (2)
 
caymandive's Avatar
 
Join Date: Dec 2005
Location: N.Va
Posts: 4,066
Received 72 Likes on 35 Posts
Default

None that I've every noticed when I had the car. With some experimentation I once tried to get the brake torque as high as possible and the car did something odd, which I can't explain. Needless to say it was my worst 60' time ever. Keep the revs low and just mash the pedal.
Old 05-26-09, 02:01 PM
  #5  
HKS350
Lexus Champion
iTrader: (4)
 
HKS350's Avatar
 
Join Date: Apr 2006
Location: North Carolina
Posts: 1,704
Likes: 0
Received 10 Likes on 10 Posts
Default

Should be fine with little issues below 1500 rpm's. If you go higher than that then the frist copoant to fail will be your tq converter. Even higher then you'll start to break mount points on the tranny. These could also lead to cracks in the casing.
These are the failures I seen in my old IS300 Turbo. Of course it had alot higher HP but all the failure came while tq braking.

If your doing it daily then you will destroy you tq converter pretty quick. But what does that really matter just replace it with a better on when it fails
Old 05-26-09, 05:09 PM
  #6  
McDonough
Rookie
 
McDonough's Avatar
 
Join Date: Jan 2003
Location: GA
Posts: 78
Likes: 0
Received 0 Likes on 0 Posts
Default

IF someone doesn't think this would cause more damage to the car than easy starts, well, I have ocean front property in Arizona for sale.
Old 05-26-09, 05:44 PM
  #7  
Kurtz
Lexus Fanatic
iTrader: (1)
 
Kurtz's Avatar
 
Join Date: Aug 2007
Location: NC
Posts: 7,810
Likes: 0
Received 14 Likes on 11 Posts
Default

At the power levels and rpms you're discussing you're not doing much harm to the torque converter.

I wouldn't do it daily, but once in a while won't hurt it... certainly far less than a clutch dump on a manual would.

If you really want higher rpm launches though the proper method would be a higher stall torque converter (or just have em bend the fins on the stock one to raise the stall a bit since I doubt anybody offers an aftermarket part for this transmission)
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
IRomprey
LS - 1st and 2nd Gen (1990-2000)
25
12-28-18 05:54 AM
Dispin
SC- 1st Gen (1992-2000)
25
08-01-09 10:21 PM
np20412
Car Chat
11
04-26-06 03:17 AM
RacingAristo
GS - 2nd Gen (1998-2005)
6
04-28-01 09:56 PM



Quick Reply: Torque Braking for Launch - Damage to vehicle?



All times are GMT -7. The time now is 02:02 PM.