2004 - 2008 F-150
Sponsored by:
Sponsored by: Real Truck

Hitting up the Track this Wed... Tips?

Thread Tools
 
Search this Thread
 
Old Nov 5, 2005 | 09:19 PM
  #16  
jpdadeo's Avatar
Senior Member
Joined: May 2004
Posts: 5,409
Likes: 1
From: Sunny FL
here's TP's post on power braking

Originally posted by Superchips_Distributor (snip)

You're absolutely right, "stalling up" or "brake torquing" like that against the brakes will only slow you down in these (any most other non-race cars) vehicles. What happens is the tranny heats up (yes, just in that very short time) so it doesn't pull quite as hard in 2nd & 3rd from the PCM adding fuel & pulling timing in response to that load before you ever even leave the line, so it slows down a bit - for me, it's anywhere from 1-3 tenths, depending on how hard I stall it. Then of course the converter doesn't flash as high, so you don't leave *quite* as hard, and the combined effect is typically about a tenth, just like you found.

For your vehicle and most other street-driven automatics, even with slicks you get the hardest launch by letting the converter "flash" - sit there and idle & then just nail the throttle. It'll leave harder & give you a quicker ET. For the most part, only race cars with transmission brakes should stall it up.
 
Reply
Old Nov 7, 2005 | 12:29 PM
  #17  
Inline6's Avatar
Senior Member
Joined: Dec 2004
Posts: 291
Likes: 0
From: Boise, ID
If you are going for best et and not worried about going rounds flash the converter. If you want to be consistent put a light load on the converter every time. It is amazing the kind of reaction times you can get with a FX4, especially after a three or four races to practice.
 
Reply
Old Nov 8, 2005 | 12:24 AM
  #18  
Intel486's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2001
Posts: 2,130
Likes: 1
From: Nawlins
Originally Posted by jpdadeo
here's TP's post on power braking
Yup, that's the post I've seen before. Was wondering what everyone elses experience is with it. Seems my truck doesn't kick off the line as hard if I don't stall it up a little.

Wonder if it's okay to do it to take the slack out of the driveline before you go.
 
Reply
Old Nov 8, 2005 | 09:18 AM
  #19  
jpdadeo's Avatar
Senior Member
Joined: May 2004
Posts: 5,409
Likes: 1
From: Sunny FL
Intel486, since you’re going to be at the track try a few different launch techniques and see which one works best.

Taking the slack out of the driveline and power braking are two different things altogether. Slightly raising the rpm’s to take the slack out isn’t going to heat up the tranny and it’s also not considered power braking. I get my strongest launches when I hold the brake with my left foot and raise my rpm’s up between 900 & 1,000. No excessive tire spin and a good solid flash
 
Reply
Old Nov 8, 2005 | 10:55 PM
  #20  
Intel486's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2001
Posts: 2,130
Likes: 1
From: Nawlins
Originally Posted by jpdadeo
Intel486, since you’re going to be at the track try a few different launch techniques and see which one works best.

Taking the slack out of the driveline and power braking are two different things altogether. Slightly raising the rpm’s to take the slack out isn’t going to heat up the tranny and it’s also not considered power braking. I get my strongest launches when I hold the brake with my left foot and raise my rpm’s up between 900 & 1,000. No excessive tire spin and a good solid flash
Will do and report back on the times... Hopefully it gives me motivation to put money into my truck now We're planning on hitting it up tomorrow. I'm heading out there with a couple friends. One has a WRX and another a VW. I'm pretty sure I'll take the VW... lol
 
Reply
Old Nov 9, 2005 | 05:32 PM
  #21  
Intel486's Avatar
Thread Starter
|
Senior Member
Joined: Oct 2001
Posts: 2,130
Likes: 1
From: Nawlins
Last check in b4 I'm hitting the track.

So far I've taken the spare off and taken everything out of the bed I had (couple tool boxes, golf clubs, bunch of my detailing supplies, etc.) and taken the spare tire off. Prbably won't be taking the tailgate off for a run but I will see when I get to the track. I also got enough gas to arrive at the rack with around a 1/2 tank where I like it.

It's about 92 degrees here today... hopefully it cools off some. Last week it was liek 50 degrees and it has warmed up :-(
 
Reply
Old Nov 9, 2005 | 06:38 PM
  #22  
KC8FLB's Avatar
Senior Member
Joined: Oct 2004
Posts: 240
Likes: 2
From: Wyandotte, Mi
If you have stock treaded street tires, please stay out of the water/bleach box. All you will do is get slippery water to the starting line which will affect others launches. The proper way to "clean" your treaded street tires is just to brake torque and gentry spin them a few revolutions to clean off road grime/stones..
If you can't spin them, dont worry about "cleaning" them...

I learned all about drag racing and worked on my reaction times in a 1996 contour!!!! 17 sec 1/4 mile, but was very consistent.
Got down in top 3 a few times because of consistency and R/T. Lost 1st place to a 10 sec corvette.

Good luck and have fun!!!!!
 

Last edited by KC8FLB; Nov 9, 2005 at 06:41 PM.
Reply
Old Nov 9, 2005 | 07:45 PM
  #23  
Josiah's Avatar
Senior Member
Truck of the Month
Joined: Jan 2005
Posts: 6,494
Likes: 1
From: Northern CA
Originally Posted by KC8FLB
I learned all about drag racing and worked on my reaction times in a 1996 contour!!!! 17 sec 1/4 mile, but was very consistent.
Got down in top 3 a few times because of consistency and R/T. Lost 1st place to a 10 sec corvette.

Good luck and have fun!!!!!
I call bs. The gap in your et's (7 seconds)...what in the h-e-double hockeysticks is that.
 
Reply
Old Nov 9, 2005 | 07:49 PM
  #24  
jpdadeo's Avatar
Senior Member
Joined: May 2004
Posts: 5,409
Likes: 1
From: Sunny FL
The tree handicaps different classes
 
Reply
Old Nov 9, 2005 | 08:35 PM
  #25  
KC8FLB's Avatar
Senior Member
Joined: Oct 2004
Posts: 240
Likes: 2
From: Wyandotte, Mi
The tree handicaps different classes

Yep, this is how it works:

You do a few test and tune runs and you determine what you think your lowest time is (best) that you can run and you turn that time in to the tower. They then handicap you by the difference in everybodies time. So lets say I think my most consistent time is 17.0 secs and the corvette says his best consistent time is 10.0 secs, we would both line up at the same tree, but my tree drops 7 seconds quicker than his does. Yep, that means I get a 7 second head start. The winner is still the first one who crosses the line first. But you cannot beat your time that you gave the tower or you get disqualified. This way it boils down to reaction time and consistency.

Drag racing is alot of fun and you can do it with pretty much any vehicle as long as your vehicle is not faster that the track is insured/certified for or if your vehicle leaks fluis on the track. Go check out your local drag strip "test 'n tune" night. Usually costs under $40 to run as many times as you want. You will see everything from full blown long dragsters to 1970's conversion vans running down the track at a blistering 23 sec in the quarter.
 
Reply
Old Nov 10, 2005 | 02:41 AM
  #26  
Josiah's Avatar
Senior Member
Truck of the Month
Joined: Jan 2005
Posts: 6,494
Likes: 1
From: Northern CA
You learn something new everyday, thanks for the clarification and no offense on doubting you.
 
Reply




All times are GMT -4. The time now is 09:24 PM.