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Old Nov 30, 2005 | 01:37 PM
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Default Drag race-launch question

hi all,
question:
fbody guys remove the front sway bar for racing. why? what is the purpose?

will this help a c5?

i cant seem to hit 6's in the 1/8. to date my best pulls are 7.10 at 97-98mph w/1.6x short times.

rodney a4, maggy, mt et radials (17in), 2800 tc, 3.42's. 03 ls6 btm end, 04 ls1heads, headers, vararam, tune 466h/455tq.

thanks in advance
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Old Nov 30, 2005 | 01:50 PM
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Originally Posted by usd2sing
hi all,
question:
fbody guys remove the front sway bar for racing. why? what is the purpose?

will this help a c5?

i cant seem to hit 6's in the 1/8. to date my best pulls are 7.10 at 97-98mph w/1.6x short times.

rodney a4, maggy, mt et radials (17in), 2800 tc, 3.42's. 03 ls6 btm end, 04 ls1heads, headers, vararam, tune 466h/455tq.

thanks in advance
I don't think you have to remove it. Just unbolt one end. It allows for more weight transfer.
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Old Nov 30, 2005 | 02:42 PM
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If you're not spinning on your launch or going down the track, then I don't think that's necessary.
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Old Nov 30, 2005 | 03:16 PM
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Dan you mph and rwhp/tq indicate you should be able to get there. It appears to me you are not getting the 60' need to make 6's in the eigth.

I have less than you do and run 5000 stall and 3.90 rear.

I recently scored some 1.5s and ran a 6 in the eighth.

I find my car 60's better leaving off idle and hitting it. When I brake stall it is 1.6x

With the current equipment you have, try different launches. Try taking weight out, maybe borrow some skinnies, try differnt pressures in the rear. You are so close that any little change might be the one to get you there.
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Old Nov 30, 2005 | 04:54 PM
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Originally Posted by REDGAR
Dan you mph and rwhp/tq indicate you should be able to get there. It appears to me you are not getting the 60' need to make 6's in the eigth.

I have less than you do and run 5000 stall and 3.90 rear.

I recently scored some 1.5s and ran a 6 in the eighth.

I find my car 60's better leaving off idle and hitting it. When I brake stall it is 1.6x

With the current equipment you have, try different launches. Try taking weight out, maybe borrow some skinnies, try differnt pressures in the rear. You are so close that any little change might be the one to get you there.
we just did a rear swap to 3.42's. was running the 3.15. best pulls with 3.15's was a 7.16. actually thought the gear change was gonna do the trick.
maybe its time for the better driver mod.
i'll try the off idle launch tomorrow night. was b. stalling up to 18-1900 before with min spin. tires usually at 17lbs.

thanks for the advice gang.
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Old Nov 30, 2005 | 04:58 PM
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Originally Posted by Special K
I don't think you have to remove it. Just unbolt one end. It allows for more weight transfer.
which end??? pass or dr side...
willing to try just about anything at this point.
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Old Nov 30, 2005 | 06:19 PM
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Originally Posted by usd2sing
which end??? pass or dr side...
willing to try just about anything at this point.
Doesn't matter Dan. With either end disconnected it won't work. Do you know if you have a traction problem?

I do disagree with some comments in this thread. You want to pick up .15 consistently. That's quite a bit. If you're not losing much traction I don't think this will do it. I would also go with a hard launch

This is a good place to start, simple and cheap. You can also remove your fan belt. Better have a cold engine to start with or an electric water pump. Try and get a 100# out of the car. Lot of things you can do and it won't cost you a ton of money. Good luck.

Last edited by Special K; Nov 30, 2005 at 06:22 PM.
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Old Dec 1, 2005 | 08:54 AM
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Did you run last night and if so how did you do?
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Old Dec 1, 2005 | 08:56 AM
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running tonight. hopefully, the wind is blowin pretty hard at the moment.
keepin my fingers crossed.
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Old Dec 1, 2005 | 10:29 AM
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One last suggestion. You can save weight by keeping the gas tank at a minimum and bring extra gas in a can.
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Old Dec 1, 2005 | 11:14 AM
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Originally Posted by Special K
Doesn't matter Dan. With either end disconnected it won't work.
Yes, it won't work as designed, but to no gain at the drag strip. Think about what it does, how it works. The sway bar is a torsion bar. It doesn't perform it's designed function until the car is in a corner, and starting to develop body roll. Disconnecting one end will render it usless during cornering, but will have zero effect at the drag strip. If the purpose of disconnecting it is to prevent the drag of the bar turning in the bushings from inhibiting weight transfer, the connected end will still force the bar to turn in the bushings. Nothing gained. If the bar isn't to rotate, both ends must be disconnected. Now, you are halfway there to removing it. You might as well finish the job. The weight transfer will be enhanced for two reasons and provide a plus, that many people don't consider. The friction of the bar turning in the bushings will be gone. One advantage to weight transfer. The weight of the bar will be off of the front wheels. A second advanage to weight transfer. The factor that some never consider, is that the bar is in FRONT if the front wheels. Just parked at the curb, removal of weight from in front of the front wheels, puts weight onto the rear wheels. Add some additional weight transfer, and...

As you can see, disconnecting only one end of the bar produces nothing. Completely removing the bar CAN make a difference that can seen.

RACE ON!!!
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Old Dec 1, 2005 | 11:15 AM
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Originally Posted by Special K
One last suggestion. You can save weight by keeping the gas tank at a minimum and bring extra gas in a can.
Bob, don't give away ALL of your secrets...
Ron
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Old Dec 1, 2005 | 11:19 AM
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Originally Posted by CFI-EFI
Yes, it won't work as designed, but to no gain at the drag strip. Think about what it does, how it works. The sway bar is a torsion bar. It doesn't perform it's designed function until the car is in a corner, and starting to develop body roll. Disconnecting one end will render it usless during cornering, but will have zero effect at the drag strip. If the purpose of disconnecting it is to prevent the drag of the bar turning in the bushings from inhibiting weight transfer, the connected end will still force the bar to turn in the bushings. Nothing gained. If the bar isn't to rotate, both ends must be disconnected. Now, you are halfway there to removing it. You might as well finish the job. The weight transfer will be enhanced for two reasons and provide a plus, that many people don't consider. The friction of the bar turning in the bushings will be gone. One advantage to weight transfer. The weight of the bar will be off of the front wheels. A second advanage to weight transfer. The factor that some never consider, is that the bar is in FRONT if the front wheels. Just parked at the curb, removal of weight from in front of the front wheels, puts weight onto the rear wheels. Add some additional weight transfer, and...

As you can see, disconnecting only one end of the bar produces nothing. Completely removing the bar CAN make a difference that can seen.

RACE ON!!!

Once again..you are the man. Thanks for the the detailed answer. Mind if I copy it and paste it onto our Corvette Challenge web pages?
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Old Dec 1, 2005 | 11:33 AM
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Thank you.

Feel free to use it to it's best advantage. I wrote that to benefit any and all. After all, with just a little reflection, it is nothing more than a common sense analysis of the subject. It's easier to make things work better, if you know what makes them work in the first place.

RACE ON!!!
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Old Dec 1, 2005 | 11:54 AM
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Originally Posted by CFI-EFI
Yes, it won't work as designed, but to no gain at the drag strip. Think about what it does, how it works. The sway bar is a torsion bar. It doesn't perform it's designed function until the car is in a corner, and starting to develop body roll. Disconnecting one end will render it usless during cornering, but will have zero effect at the drag strip. If the purpose of disconnecting it is to prevent the drag of the bar turning in the bushings from inhibiting weight transfer, the connected end will still force the bar to turn in the bushings. Nothing gained. If the bar isn't to rotate, both ends must be disconnected. Now, you are halfway there to removing it. You might as well finish the job. The weight transfer will be enhanced for two reasons and provide a plus, that many people don't consider. The friction of the bar turning in the bushings will be gone. One advantage to weight transfer. The weight of the bar will be off of the front wheels. A second advanage to weight transfer. The factor that some never consider, is that the bar is in FRONT if the front wheels. Just parked at the curb, removal of weight from in front of the front wheels, puts weight onto the rear wheels. Add some additional weight transfer, and...

As you can see, disconnecting only one end of the bar produces nothing. Completely removing the bar CAN make a difference that can seen.

RACE ON!!!
I agree and disagree. The bar ties the left and right suspension together so when one wheel either lifts or drops quickly the bar transfers some of the developed energy to the opposite side. Because the bar doesn't function it will allow some weight transfer. You can also unbolt both ends for more improvement. And removing it completely will save some weight.

I am curious as to whether he can get his improvement tonight and I hope he posts his results.

Last edited by Special K; Dec 1, 2005 at 12:11 PM.
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Old Dec 1, 2005 | 12:01 PM
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Originally Posted by Dr.Ron
Bob, don't give away ALL of your secrets...
Ron
Wanna know the biggest secret? Get my slug (that's what Edgar called my car) to run the numbers each and every time. I'm almost there.

Then I'll take my "slug" and make some cash next year and laugh at these guys that spend half their time in the shop trying to figure out why the tranny is so hot they can't run it. But they can brag that it'll run 11 sec. Go figure.
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Old Dec 1, 2005 | 12:53 PM
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awesome info gang...thanks. i've drained the tank down to 1/4. just pulled the front bar off completely.

now just hopin the wind dies down. they'll shut the place down if the cross wind gets over 15-20mpg.

just lookin for that last .1....for now anyway...
before it was 7.4...got it
then 7.3..got it..
then beat 7.2 got it.
now lookin for 6.99. with a backup run.

thanks so much everbody.
i luv this place!
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Old Dec 1, 2005 | 01:08 PM
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Originally Posted by usd2sing
awesome info gang...thanks. i've drained the tank down to 1/4. just pulled the front bar off completely.

now just hopin the wind dies down. they'll shut the place down if the cross wind gets over 15-20mpg.

just lookin for that last .1....for now anyway...
before it was 7.4...got it
then 7.3..got it..
then beat 7.2 got it.
now lookin for 6.99. with a backup run.

thanks so much everbody.
i luv this place!
6.95 Dan. Get that gas down to 1/8.
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Old Dec 1, 2005 | 01:25 PM
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Originally Posted by Special K
Wanna know the biggest secret? Get my slug (that's what Edgar called my car) to run the numbers each and every time. I'm almost there.

Then I'll take my "slug" and make some cash next year and laugh at these guys that spend half their time in the shop trying to figure out why the tranny is so hot they can't run it. But they can brag that it'll run 11 sec. Go figure.
Yet another poke. Just wondering sicne you don't like me this week, does that mean next week you will like me? I just want to plan accordingly

"You are the best best Jerry....the best!"
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Old Dec 1, 2005 | 01:38 PM
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Originally Posted by REDGAR
Yet another poke. Just wondering sicne you don't like me this week, does that mean next week you will like me? I just want to plan accordingly

"You are the best best Jerry....the best!"
You hear about the guy that quit going to football games? Every time they got in a huddle he thought they were talking about him.

I quoted what you said about my car. As far as the rest of the story goes, if the shoe fits wear it.

You want to be civil, I'll be civil. You want a pissing contest, you've come to the right guy. You've made several false accusations about me and others. What's to like?

As I suggested, best way to get along is to ignore each other. It can only go downhill from here.

Edit:

Sorry Dan. Your post.

Last edited by Special K; Dec 2, 2005 at 06:39 AM.
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