Drag Racing Technique Improve your track times

how much weight to make a difference

Thread Tools
 
Search this Thread
 
Old Feb 7, 2006 | 06:49 PM
  #1  
SpeedDemon02SS's Avatar
Thread Starter
Registered User
 
Joined: May 2004
Posts: 1,059
From: NJ
how much weight to make a difference

would 100lbs make a noticable difference at the track? if so, how much? if not, how much weight would it take to make a difference?
Old Feb 7, 2006 | 07:31 PM
  #2  
Guido67SS's Avatar
Registered User
 
Joined: Aug 1999
Posts: 108
From: Norwalk, Ohio
Re: how much weight to make a difference

100 lbs equals 1/10 off your ET.
Old Feb 7, 2006 | 07:41 PM
  #3  
SpeedDemon02SS's Avatar
Thread Starter
Registered User
 
Joined: May 2004
Posts: 1,059
From: NJ
Re: how much weight to make a difference

nice...

how much weight do you think i could pick up by taking out the spare, jack, draining the washer fluid, and back seats.

anything else i can ditch easily?
Old Feb 7, 2006 | 08:04 PM
  #4  
Guido67SS's Avatar
Registered User
 
Joined: Aug 1999
Posts: 108
From: Norwalk, Ohio
Re: how much weight to make a difference

U might pick up a 10th, but with the 6 speed I would be more concerned with launch and traction issues? Are you racing to run a number or to win races by running consistent ET?
Old Feb 7, 2006 | 08:08 PM
  #5  
SpeedDemon02SS's Avatar
Thread Starter
Registered User
 
Joined: May 2004
Posts: 1,059
From: NJ
Re: how much weight to make a difference

no. im just racing for myself...but im about a 10th away from the 12's.

though...i really do need a new clutch.
Old Feb 7, 2006 | 08:13 PM
  #6  
Guido67SS's Avatar
Registered User
 
Joined: Aug 1999
Posts: 108
From: Norwalk, Ohio
Re: how much weight to make a difference

Been there. I loved racing with the clutch, I just couldn't afford the parts. Got a TH400 with a reverse manual VB for about 800.00. Went through two 4 spds and a few rear ends with the stick.
Old Feb 7, 2006 | 08:19 PM
  #7  
SpeedDemon02SS's Avatar
Thread Starter
Registered User
 
Joined: May 2004
Posts: 1,059
From: NJ
Re: how much weight to make a difference

i hear ya. i could never part with the 6spd though. id rather replace the clutch every 10k miles.
Old Feb 8, 2006 | 04:18 PM
  #8  
Injuneer's Avatar
Administrator
 
Joined: Nov 1998
Posts: 71,110
From: Hell was full so they sent me to NJ
Re: how much weight to make a difference

Weight reduction thread - good for some ideas on what you can remove, and how much weight you will save:

http://www.ls1tech.com/forums/archiv...p/t-17319.html

If you use the popular calculators for "HP from ET" you can see that a 100# saving on a 3,600# race weight car running 13's would reduce your ET by about 0.112 seconds. The "rule of thumb" for 1/10th for 100# is pretty accurate. You should also pick up a shade under 1 mph.
Old Feb 8, 2006 | 09:19 PM
  #9  
SpeedDemon02SS's Avatar
Thread Starter
Registered User
 
Joined: May 2004
Posts: 1,059
From: NJ
Re: how much weight to make a difference

thanks...that helps. im not gonna go drastic...but i can easisly cut out 100lbs. just in terms of jack, tire, rear and passagner seats, washer fluid resivoir...i could lose 30 myself
Old Feb 10, 2006 | 02:24 AM
  #10  
damien8618's Avatar
Registered User
 
Joined: Feb 2006
Posts: 167
Re: how much weight to make a difference

if i was u i would leave the spare, jack, and rear seats. move your battery to the hatcback, get rid of everything in the engine compartment that isnt needed in cluding power steering pump and box, air conditioning, washer fluid reservoir, front swaybar, air conditioning condenser, vacuum canister, ect. And I would actually add weight to the hatchback. keep adding weight till ur et peaks. this procedure is called weight transfer and works good on cars with stock suspension. you should also buy adjustable struts and shocks to dial in ur suspension. when you leave the finish line you want the front of the car to lift off the ground, the rear tires to plant hard and get traction and the body in the rear to raise pushing the axle down. All of this should happen at one time.
Old Feb 10, 2006 | 08:13 AM
  #11  
SpeedDemon02SS's Avatar
Thread Starter
Registered User
 
Joined: May 2004
Posts: 1,059
From: NJ
Re: how much weight to make a difference

that is all good. but this car is more of a street car than a track car. i just want to take out 100lbs 5minutes before i leave for the track. so i dont want to ditch power steering or AC. same thing with the suspension, i am gonna replace it, but go for a more streetable setup.

thanks though
Old Feb 12, 2006 | 03:07 PM
  #12  
damien8618's Avatar
Registered User
 
Joined: Feb 2006
Posts: 167
Re: how much weight to make a difference

ok, then I would drain the washer reservoir and remove anything you can from the front thats easy to remove and then replace after you race. I would take the passenger and back seats out. and I would add about 50 pounds to the hatchback. on a stock car with little mods adding weight to the rear will make your car faster.
Old Feb 12, 2006 | 03:09 PM
  #13  
damien8618's Avatar
Registered User
 
Joined: Feb 2006
Posts: 167
Re: how much weight to make a difference

the main thing is you dont want to remove weight from the rear of the car. so leave the spare and the jack.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dbusch22
Forced Induction
6
Oct 31, 2016 11:09 AM
Cam's maro
LT1 Based Engine Tech
1
Jan 30, 2015 09:21 PM
InfernalVortex
LT1 Based Engine Tech
3
Jan 17, 2015 09:35 AM
Rich_z28
Car Audio and Electronics
9
Sep 8, 2002 12:00 AM
$hawn
Car Audio and Electronics
5
Aug 28, 2002 09:09 AM




All times are GMT -5. The time now is 05:33 AM.