Drag Racing Tech
Sponsored by:
Sponsored by:

new wheel hop

Thread Tools
 
Search this Thread
 
Old 03-15-2006, 03:56 PM
  #1  
TECH Addict
Thread Starter
iTrader: (3)
 
slayer_taunu's Avatar
 
Join Date: Apr 2005
Location: Dallas, TX / Boston, MA
Posts: 2,169
Likes: 0
Received 1 Like on 1 Post

Default new wheel hop

i've finally got to go to a real track after installing my torque arm, and i'm getting bad wheel hop off the line, as well as the 1-2 shift. i didn't have any issues with wheel hop before the torque arm, i only used to spin like a ****.

i would think that with all the suspension/chassis mods that i have (all in my sig), this would not be an issue. as this car is a street car, the pinion angle is set to -1 degrees.

stock LS6 clutch, rear end and BFG KDW tires, inflated to street pressure (36psi). front swaybar is still connected. i launch around 1300 rpms and slip out the clutch as i gas it... only pulling a 2.2 60'.
Old 03-15-2006, 05:45 PM
  #2  
TECH Addict
iTrader: (8)
 
GIZMO's Avatar
 
Join Date: Jan 2004
Location: Shelby, NC
Posts: 2,780
Received 3 Likes on 3 Posts

Default

Put an air bag in the passenger side rear spring. Try 15-20 psi.

Daren
Old 03-15-2006, 06:00 PM
  #3  
11 Second Club
iTrader: (2)
 
RaNsOm's Avatar
 
Join Date: Dec 2001
Location: Upper Marlboro, MD
Posts: 1,297
Likes: 0
Received 0 Likes on 0 Posts

Default

whats your TA pinion angle? dont go any farther than -2*. Also maybe try some LCA relocation brackets? they fixed my problem instantly
Old 03-16-2006, 11:31 AM
  #4  
TECH Addict
Thread Starter
iTrader: (3)
 
slayer_taunu's Avatar
 
Join Date: Apr 2005
Location: Dallas, TX / Boston, MA
Posts: 2,169
Likes: 0
Received 1 Like on 1 Post

Default

Originally Posted by RaNsOm
whats your TA pinion angle? dont go any farther than -2*. Also maybe try some LCA relocation brackets? they fixed my problem instantly
pinion angle is -1. i was told any more than that on a street car, and i'd have serious issues with the seal where the DS meets the rear
Old 03-16-2006, 11:42 AM
  #5  
TECH Addict
Thread Starter
iTrader: (3)
 
slayer_taunu's Avatar
 
Join Date: Apr 2005
Location: Dallas, TX / Boston, MA
Posts: 2,169
Likes: 0
Received 1 Like on 1 Post

Default

Originally Posted by GIZMO
Put an air bag in the passenger side rear spring. Try 15-20 psi.

Daren
ok, this sounds like a newbie question, but what exactly is one of these 'airbags' and where do i get one.
Old 03-16-2006, 12:12 PM
  #6  
TECH Fanatic
iTrader: (1)
 
bigdsz's Avatar
 
Join Date: Jun 2003
Location: Mount Dora, Fla
Posts: 1,876
Likes: 0
Received 0 Likes on 0 Posts
Default

Relocation brackets immediately solved my severe wheel hop. Launching at 3,500-4,000 rpm I thought the car was going to shake apart. I welded in the RB's and zero hop.
Old 03-16-2006, 02:56 PM
  #7  
TECH Addict
iTrader: (8)
 
GIZMO's Avatar
 
Join Date: Jan 2004
Location: Shelby, NC
Posts: 2,780
Received 3 Likes on 3 Posts

Default

Originally Posted by slayer_taunu
ok, this sounds like a newbie question, but what exactly is one of these 'airbags' and where do i get one.
An air bag is like a balloon that goes inside the coil spring. The inflated pressure will limit the rate at which the spring compresses. They are available from both Jegs and Summit.
Relocation brackets are recommened for lowerred cars to correct lower control arm angle.

Daren
Old 03-16-2006, 03:13 PM
  #8  
Race your car!
iTrader: (50)
 
JL ws-6's Avatar
 
Join Date: Mar 2004
Posts: 15,420
Likes: 0
Received 18 Likes on 18 Posts

Default

the relo. brackets will probably fix the problem, you most likly won't need the lca'sin the lower hole, just one down from stock. I had them put on when I did my 12 bolt, and the lca's were put in teh center hole. I tried moving them up to the stock hole, and got alot of hop on the street, I then tried them in the lowest hole, didn't really seem any different then in the middle, so back the the middle hole they went.
Old 03-30-2006, 07:38 PM
  #9  
TECH Addict
Thread Starter
iTrader: (3)
 
slayer_taunu's Avatar
 
Join Date: Apr 2005
Location: Dallas, TX / Boston, MA
Posts: 2,169
Likes: 0
Received 1 Like on 1 Post

Default

now here's the kicker... it didn't do it when i first put the torque arm on, it has just done it recently, after i moved. i've checked to make sure the rear suspension bolts are tight, so is it possible that my suspension setup was good for my old track (New england dragway), and my setup just doesnt like the tracks that i've been going to?

Last edited by slayer_taunu; 03-31-2006 at 01:05 AM.
Old 03-30-2006, 07:59 PM
  #10  
TECH Regular
iTrader: (75)
 
slolt1's Avatar
 
Join Date: Dec 2005
Posts: 497
Likes: 0
Received 0 Likes on 0 Posts

Default

relocatoin brackets and umi sells a nice set if you have a 9 inch rear
Old 03-31-2006, 08:18 PM
  #11  
NXZ
On The Tree
 
NXZ's Avatar
 
Join Date: Aug 2005
Location: Muncie, IN
Posts: 110
Likes: 0
Received 0 Likes on 0 Posts
Default

The wheel hoop that I received was due to a loose rear control arm. On my Mosier 12 bolt, a stock control arm bushing and the mounting bracket on the rear are not the same size. I had to over tighten the control arm bolt and this brought the bracket in until it was seated correctly. Just a little fix that I found.
Old 04-01-2006, 05:17 AM
  #12  
TECH Addict
iTrader: (70)
 
chpmnsws6's Avatar
 
Join Date: Sep 2003
Location: Springfield IL
Posts: 2,525
Received 2 Likes on 2 Posts

Default

Originally Posted by GIZMO
Put an air bag in the passenger side rear spring. Try 15-20 psi.

Daren
He might be able to luanch straight then but every other gear will still be slightly off, and if he had to hit the brakes for some reason (other car getting squirly) it is going to put him into the wall much easier.

Airbags are a redneck bandaid
Old 04-01-2006, 09:51 AM
  #13  
9 Second Club
iTrader: (1)
 
LS1Queen's Avatar
 
Join Date: Oct 2005
Location: Vidalia, Ga.
Posts: 505
Likes: 0
Received 0 Likes on 0 Posts
Default

Maybe I'm wrong but i always thought a stick car needed more pinion angle than an auto -1 will hit the tires preety hard I would move the pinion angle to -3 and put some good shocks on it, I have and auto with -3 pinion angle and i can put the car on the bumper anytime i feel like it with drag radials.
Old 04-01-2006, 01:18 PM
  #14  
8 second mod
iTrader: (37)
 
Noyzee's Avatar
 
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes on 0 Posts

Default

matt, check all your bolts, make sure the top ones on the tq arm are good!! be sure none backed off. when i did the install i used loc tight so it should be fine.
other then that, it is the track. ned you would spin because its a **** track!! your local track now must be pretty good!
the relocation brackets should fix it. dont change pinion angle! i run mine at -1, and if i just cant hook i bump it to -2, but -1 on your car is good!

bmr makes a set, they should be welded on. they are simple todo tho, any speed shop around you should be able to help
Old 04-02-2006, 10:36 AM
  #15  
11 Second Club
iTrader: (8)
 
AFTICA's Avatar
 
Join Date: Jan 2002
Location: W.P.B. Florida
Posts: 562
Likes: 0
Received 1 Like on 1 Post

Default

The relocation brackets cured ALL my wheel hop issues. I'm at stock ride height and used the lowest hole on the BMR bolt-in brackets.
Old 04-02-2006, 02:06 PM
  #16  
TECH Addict
iTrader: (8)
 
GIZMO's Avatar
 
Join Date: Jan 2004
Location: Shelby, NC
Posts: 2,780
Received 3 Likes on 3 Posts

Default

Originally Posted by chpmnsws6
He might be able to luanch straight then but every other gear will still be slightly off, and if he had to hit the brakes for some reason (other car getting squirly) it is going to put him into the wall much easier.

Airbags are a redneck bandaid
Well, you obviously don't know a whole lot about this subject.
Old 04-02-2006, 07:33 PM
  #17  
8 second mod
iTrader: (37)
 
Noyzee's Avatar
 
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by GIZMO
Well, you obviously don't know a whole lot about this subject.
i do have to agree a little with him. with the right suspention setup you car should go straight without an air bag. air bag is a cheep fix for a real issue.
it wont fix wheelhop tho
Old 04-02-2006, 07:38 PM
  #18  
TECH Addict
iTrader: (70)
 
chpmnsws6's Avatar
 
Join Date: Sep 2003
Location: Springfield IL
Posts: 2,525
Received 2 Likes on 2 Posts

Default

Originally Posted by GIZMO
Well, you obviously don't know a whole lot about this subject.

Let me guess, your also the person who runs a 350 pound spring infront and a 150 pounder in the rear. you also think you need more weight on the drivers side since it lifts up more then the passenger side


preloading the spring is dangerous
Old 04-02-2006, 07:44 PM
  #19  
8 second mod
iTrader: (37)
 
Noyzee's Avatar
 
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by chpmnsws6
Let me guess, your also the person who runs a 350 pound spring infront and a 150 pounder in the rear. you also think you need more weight on the drivers side since it lifts up more then the passenger side


preloading the spring is dangerous
sway bars, sway bars. no air bags!!
Old 04-02-2006, 09:42 PM
  #20  
TECH Addict
iTrader: (8)
 
GIZMO's Avatar
 
Join Date: Jan 2004
Location: Shelby, NC
Posts: 2,780
Received 3 Likes on 3 Posts

Default

Originally Posted by chpmnsws6
Let me guess, your also the person who runs a 350 pound spring infront and a 150 pounder in the rear. you also think you need more weight on the drivers side since it lifts up more then the passenger side


preloading the spring is dangerous
No. I am the guy that built the current IHRA B/FIA National Record Holder.

http://prophotoproductions.exposurem...iv9/_g2l004942

This car does the sixty in 1.35. It is extremely stable at any speed. The air bag is a pretty good tuning tool when you are not allowed an aftermarket weld in sway bar. I also use different spring rates.


Daren



All times are GMT -5. The time now is 08:00 PM.