thoughts on preloading oem rear sway bar for drag racing
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
thoughts on preloading oem rear sway bar for drag racing
Been contemplating shortening the spacer between the sway bar bushings on driversside to help straighten up the launch.
I have own z28 rear sway bar with poly link bushings and Umi location spacer jobies for my 9" rear.
I know a anti roll bar would be ideal. But have any of you experimented with doing this.
How much should I shorten the spacer on the drivers side sway bar link as a starting point?
Thanks
I have own z28 rear sway bar with poly link bushings and Umi location spacer jobies for my 9" rear.
I know a anti roll bar would be ideal. But have any of you experimented with doing this.
How much should I shorten the spacer on the drivers side sway bar link as a starting point?
Thanks
#6
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Re: thoughts on preloading oem rear sway bar for drag racing
its still a wet noodle mounted under the rear axle. i would run the thickest one i could get. (if you don't want to buy an aftermarket one)
an airbag and whatever else may help a little bit, but it won't be anything like a drag bar.
an airbag and whatever else may help a little bit, but it won't be anything like a drag bar.
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
Thanks for the input guys. I might try it just for the hell of it can't see how it would hurt. Money is tight now especially with this wedding in a month. Lol
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Car: 84 Transm
Engine: 350 sbc
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Axle/Gears: ford 9", 3.90
Re: thoughts on preloading oem rear sway bar for drag racing
I run my stock bar with a 1 1/2" shortened left link and a bag in the right rear at 15 lbs. Helps a lot in keeping it launching flat. No doubt a drag bar would work better. But mine still sees a lot of street time as well as some autocross and road course time were a drag bar wouldnt work at all.
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Re: thoughts on preloading oem rear sway bar for drag racing
It helped on my GTA back in the day, but is only a slight/fine tuning aid for an otherwise reasonably well dialed/working car. - A real anti-roll is where it's at for drag racing.
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
http://s691.photobucket.com/albums/v...VID00655-1.mp4
Video from last yr when I was running 11.50's. Had shifter issues it popped into neutral onlaunch. Lots of twist
Video from last yr when I was running 11.50's. Had shifter issues it popped into neutral onlaunch. Lots of twist
Last edited by 91_B4C_RS; 04-18-2012 at 07:33 PM.
#13
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Re: thoughts on preloading oem rear sway bar for drag racing
An airbag is a good temporary solution that doesn't cost much. I'm actually still using air bags, I haven't coughed up the money for an anti roll bar yet. Its not the ideal solution but does help a lot. I went to the test and tune tonight, I was hoping to see you run.
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
out of a 99 blazer front sway bar. 1.3" diameter with 1/2 rod ends
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
1999 4wd blazer front sway bar. $40.00
1/2 rod ends/ jam nuts. $23.00
Misc steel. $30.00
Used existing sphon sway bar u bolts etc
$93.00!!!!
1/2 all thread . free!!!
Bar diameter is 1.310" roughly 33.5 mm
before
after
1/2 rod ends/ jam nuts. $23.00
Misc steel. $30.00
Used existing sphon sway bar u bolts etc
$93.00!!!!
1/2 all thread . free!!!
Bar diameter is 1.310" roughly 33.5 mm
before
after
Last edited by 91_B4C_RS; 04-21-2012 at 07:47 PM.
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
Cut about 3" off end of sway bar on each side . Welded 1/2
all thread.
Im very happy with it
all thread.
Im very happy with it
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
i still need to set it up.
shopn say jack the front end up evenly till front end is barely off ground. then adjust links with someone in the car so the the passenger side ride height is 1/16th inch higher. sound bout right?
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Re: thoughts on preloading oem rear sway bar for drag racing
Looks great man. - The only thing I might add would be a section of tubing that will fit over the bar, with a washer welded on one end. Slip it over the all-thread & bar, then weld in place. - Lots of load placed directly on the weld holding that all-thread in place, that would be a reasonably simple way to help span some of it out.
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
Looks great man. - The only thing I might add would be a section of tubing that will fit over the bar, with a washer welded on one end. Slip it over the all-thread & bar, then weld in place. - Lots of load placed directly on the weld holding that all-thread in place, that would be a reasonably simple way to help span some of it out.
I added small poly bushings behind each rod end to help keep noise to a minimum and to space it off the welded area.
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Re: thoughts on preloading oem rear sway bar for drag racing
thanks man. between the IC change and drag bar im hoping to drop anything off the 60' would make me happy.
i still need to set it up.
shopn say jack the front end up evenly till front end is barely off ground. then adjust links with someone in the car so the the passenger side ride height is 1/16th inch higher. sound bout right?
i still need to set it up.
shopn say jack the front end up evenly till front end is barely off ground. then adjust links with someone in the car so the the passenger side ride height is 1/16th inch higher. sound bout right?
I may try something like that if my other thoughts don't work, but I have another idea first, since I want to go from street/handling to drag quickly I'm thinking of taking the biggest 'normal' bar I can find (probably a 24mm stocker is the biggest I own) and modifying attachment points. Looks like the drag bars get you roughly 3x the rate of a stock type bar. By shortening the attachment points on the arms on the bar by 2" you get a little more than 2/3 the rate of a dedicated drag bar, which I'm betting will be close enough to preload enough to make it work, so if there's room without hitting the shock mounts I'm going to try cutting off the ends of a stock bar and making them adjustable over a 2" or so range.
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Car: 1991 B4C Camaro RS
Engine: 370 lsx ls3 heads victor jr w/carb
Transmission: TH400 w/brake coan 8"4500-4800 stal
Axle/Gears: Moser 9" locker w/ 4.11's
Re: thoughts on preloading oem rear sway bar for drag racing
Where do you jack by?
I may try something like that if my other thoughts don't work, but I have another idea first, since I want to go from street/handling to drag quickly I'm thinking of taking the biggest 'normal' bar I can find (probably a 24mm stocker is the biggest I own) and modifying attachment points. Looks like the drag bars get you roughly 3x the rate of a stock type bar. By shortening the attachment points on the arms on the bar by 2" you get a little more than 2/3 the rate of a dedicated drag bar, which I'm betting will be close enough to preload enough to make it work, so if there's room without hitting the shock mounts I'm going to try cutting off the ends of a stock bar and making them adjustable over a 2" or so range.
I may try something like that if my other thoughts don't work, but I have another idea first, since I want to go from street/handling to drag quickly I'm thinking of taking the biggest 'normal' bar I can find (probably a 24mm stocker is the biggest I own) and modifying attachment points. Looks like the drag bars get you roughly 3x the rate of a stock type bar. By shortening the attachment points on the arms on the bar by 2" you get a little more than 2/3 the rate of a dedicated drag bar, which I'm betting will be close enough to preload enough to make it work, so if there's room without hitting the shock mounts I'm going to try cutting off the ends of a stock bar and making them adjustable over a 2" or so range.
everything you say seems to make sense in my book. good luck with the build
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