GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

Beastmode long bars

Thread Tools
 
Search this Thread
 
Old Aug 22, 2007 | 10:20 AM
  #61  
tiffo60's Avatar
TECH Fanatic
iTrader: (2)
 
Joined: Aug 2006
Posts: 1,183
Likes: 1
From: Fort Worth
Default

Originally Posted by TXsilverado
so what are the cheances of making 3 passes without the bars and 3 passes with them? they dont look like they would be hard to remove for street use and throw back on for the track. my ride is already stiff enough without any kind of bars lol..
I have them on my Lightning and they dont make the ride any rougher at all, and it makes the rear end feel alot more stable so I would think they should have the same affect on yall's trucks
Reply
Old Aug 22, 2007 | 10:29 AM
  #62  
TXsilverado's Avatar
Moderator
20 Year Member
Loved
Liked
Community Favorite
iTrader: (19)
 
Joined: Jan 2005
Posts: 18,367
Likes: 297
From: Humble Texas
Default

Originally Posted by beastmode
ya i should be able to get a good bit of runs in next wed... theres only gonna be 50ppl cause were renting the track for 4 hrs. hopefully Quik will be able to come wit me and well log my runs and get some slips wit and w/o the bars
sweet. that will give the real hard data were looking for

Originally Posted by tiffo60
I have them on my Lightning and they dont make the ride any rougher at all, and it makes the rear end feel alot more stable so I would think they should have the same affect on yall's trucks
sounds good. i cant wait to see how all this works out
Reply
Old Aug 22, 2007 | 01:19 PM
  #63  
regency's Avatar
TECH Fanatic
iTrader: (15)
 
Joined: Nov 2005
Posts: 1,961
Likes: 3
From: Alexandria, LA
Default

ive been thinking of this for a while now. but you got to it first good luck with em
Reply
Old Aug 22, 2007 | 02:06 PM
  #64  
vanillagorilla's Avatar
TECH Veteran
iTrader: (1)
 
Joined: Apr 2004
Posts: 4,038
Likes: 1
From: Arizona Bay
Default

So it appears they work off a different principle than caltracs. I snooped around the L forums a bit and got some more info.

Caltracs work by first, preloading the leaf spring and allowing you to move the pinion angle more negative. When tq is applied to the rear end, the link and new found instant center helps lift the rear of the car. This in turn forces the rear tires into the pavement.

The long bars allow you to preload the leaf spring and to dial in pinion angle like a caltrac, but they allow the truck to squat. Looking at pics of L's with these and launching, the truck is squating significantly while pulling the front wheels.

With caltrac cars its still possible to pull the wheels for some weight transfer, but it will never squat. I think the L guys have such good luck with them, because a truck needs maximum weight transfer throughout the 1/4. Caltracs can't really provide that for a truck and that's why some truck guys experience a quick hop at launch with caltracs. I've experienced this some with what limited practice launches I've done.

I want a set.
Reply
Old Aug 22, 2007 | 06:35 PM
  #65  
03sierraslt's Avatar
Admin
20 Year Member
Loved
Liked
iTrader: (22)
 
Joined: Jul 2004
Posts: 19,007
Likes: 221
From: Western PA
Default

Originally Posted by beastmode
ya i should be able to get a good bit of runs in next wed... theres only gonna be 50ppl cause were renting the track for 4 hrs. hopefully Quik will be able to come wit me and well log my runs and get some slips wit and w/o the bars
Which track PRP?
Reply
Old Aug 22, 2007 | 07:52 PM
  #66  
UBLUZIN03's Avatar
TECH Resident
iTrader: (1)
 
Joined: Aug 2006
Posts: 791
Likes: 0
From: PA
Default

Damn those look awsome...the welds look awsome....cant wait till i need them .....
Reply
Old Aug 23, 2007 | 05:40 AM
  #67  
beastmode's Avatar
Import Moderator
iTrader: (52)
 
Joined: Jul 2006
Posts: 7,041
Likes: 0
From: Pittsburgh, PA
Default

Originally Posted by 03sierraslt
Which track PRP?
That would be the one bud, The boys from Pittspeed are renting it next wednesday from 12-4, buy in is like $50 and theres only gonna be 50 ppl if your interested
Reply
Old Aug 23, 2007 | 08:59 AM
  #68  
WJ MARK's Avatar
12 Second Truck Club
iTrader: (7)
 
Joined: Jun 2006
Posts: 2,093
Likes: 0
From: colorado above 6000 ft.
Default

My buddy built a set of those for his Duramax. They seem to work great!
Reply
Old Aug 23, 2007 | 09:32 AM
  #69  
Quik's Avatar
Thread Starter
5 year bitches!
iTrader: (7)
 
Joined: Oct 2003
Posts: 4,890
Likes: 2
From: Pittsburgh!!!!!!!! Pa
Default

Originally Posted by vanillagorilla
So it appears they work off a different principle than caltracs. I snooped around the L forums a bit and got some more info.

Caltracs work by first, preloading the leaf spring and allowing you to move the pinion angle more negative. When tq is applied to the rear end, the link and new found instant center helps lift the rear of the car. This in turn forces the rear tires into the pavement.

The long bars allow you to preload the leaf spring and to dial in pinion angle like a caltrac, but they allow the truck to squat. Looking at pics of L's with these and launching, the truck is squating significantly while pulling the front wheels.

With caltrac cars its still possible to pull the wheels for some weight transfer, but it will never squat. I think the L guys have such good luck with them, because a truck needs maximum weight transfer throughout the 1/4. Caltracs can't really provide that for a truck and that's why some truck guys experience a quick hop at launch with caltracs. I've experienced this some with what limited practice launches I've done.

I want a set.
good to hear that you did some researching as well
Reply
Old Aug 23, 2007 | 01:26 PM
  #70  
moregrip's Avatar
what a rush!
20 Year Member
Loved
Liked
Community Favorite
iTrader: (8)
 
Joined: Feb 2004
Posts: 17,629
Likes: 33
From: Wyoming
Default

one thing I'm interested in is if they are noisy at all?
Reply



All times are GMT -5. The time now is 07:00 PM.