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Author Topic:   Tighten control arm bolts?
tcmod
Dirt Full Roller

Total posts: 56
posted August 28, 2004 09:48 PM  
I have the stock style rubber bushings in my lower control arms and have always used lock nuts and just almost snug them up but don't tighten them, that way the control arm is free to move up or down. I was helping a friend with his b-mod and mentioned this and he said he was going to set ride hieght and scale it and then tighten them up. Which way is it? Thanks.

xhubby
Dirt Freak

Total posts: 376
posted August 29, 2004 10:38 AM  
We also use the stock bushing in our lowers. We use centerlock nuts, & just snug them, so the arms move smoothly.

mod70
unregistered Total posts: 376
posted August 29, 2004 10:48 AM           send a private message to xhubby   Edit/Delete Message   Reply w/QuoteBBBBBB
I've never really concidered this, but I've allways bounced the car before scaling it. I suppose if the arms are too tight it might throw the numbers off a bit. It couldn't hurt to leave the bolts a little loose while measuring it.

sdracer12
Dirt Maniac

Total posts: 180
posted August 29, 2004 11:19 AM  
I have to disagree on this one. The lower mounts aren't that thick, and it is easy for the holes to get sloppy if the bolts are only "snug". If the bolts aren't tight, your front end settings will wander when you load the car hard into the corner, changing the caster and bump.

What we did when we ran stock bushings was to bolt the arm in AT RIDE HEIGHT, and tighten the bolt down very tight. You still will have enough up and down movement if you start centered.

When scaling, it is a good idea to bounce the car several times front and rear, and then allow it to settle for a couple of minutes before you check the weights.

A better fix to the stock lower bushings are a set of white nylon bushings, with a steel pivot bushing in the center. They are reusable, easy to install, and work fantastic. I order mine from Port City Racing, or Lou Fegers Race Cars.

bachshute
Dirt Maniac

Total posts: 118
posted August 29, 2004 05:18 PM  
I agree with sdracer12 , the bolts should be tight , GM knew what they were doing when they made these parts , its not worth letting the holes get sloppy and let the settings wander , i have always run mine tight with no problems , jmo

mod70
unregistered Total posts: 118
posted August 29, 2004 05:43 PM           send a private message to bachshute   Edit/Delete Message   Reply w/QuoteBBBBBB
I agree that they should be tight when you are racing, but I think the question was refering just to when the car is being scaled. Would it be a good idea to leave them loose and allow the arms to move freely when scaling, then tighten them up before racing?

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted August 29, 2004 05:48 PM  
if you have hardened steel washers you aren't going to egg them out...

tcmod
Dirt Full Roller

Total posts: 56
posted August 29, 2004 05:52 PM  
Thanks for all the replies, I am thinking of replacing the bushings this winter with the solid ones that pivot. Have only ran this mod a few times and it is going to be aligned and scaled scaled this week. Hope to run it a couple times over labor day weekend, tcmod.

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