im concedering having a anti rollbar installed on my 67. the concerns i have is "on the street" the car jumps to the left seriously!!! (like get in the other lane). im not sure the anti rollbar will cure this on the street and would like some input. theres no need to do it if the problem is going to remain. the car allready has a large rear sway bar and air bags, udjustabe uppers and such. also at freeway speeds (55 mph) the car will shift slightly to the left as well. im looking at the wolfe racecraft. is this over kill? would a cheaper c/e do the same thing? thanks Dave

Dave,
are you sure everything is square? Rear housing square to the frame?

My car drives fine on the street with the Wolfe bar. I am assuming your currently running air bags with the passenger side preloaded? If so and you use your track air bag pressures, the car will want to steer itself. The anti-roll bar eliminates this feeling...mine runs smooth as silk on track and off.

The Dick Miller anti-roll mounted in the trunk is a slick setup if you ever wish to run tail pipes. The Wolfe makes it a real challenge to squeeze 3" pipes over the rear between the coil springs and the anti-roll bar.

some off the things you can do is to see if the car is tracking correctly.

sometimes if the rearend has been changed it can be installed alittle crooked.

check this by stringing the rear end to the front.

make sure car is on level ground with the front tires straight ahead.

take a long string and tape it at the 3 0'clock position on the rear tire.(on the tread area) with the string in hand and a tape measure walk up to the front on the car and pull the string tight and bring it(torwards the center line of the front rim) in until the string is just touching the side wall of the rear tire at the 9 o'clock position. find and area on the frame just behind the front tire. and take a measure ment......record this measurement and do the same on the other side of the car. you measurements should be pretty close.

if the rear end is out of wack it will show up pretty good.

if the car is tracking to the left then the measurement on the left side will show a bigger measurement.

this is telling you the rear end wants to go left but the front tires are trying to go straight............

in the past i have found this to be helpful to do because i would have cars leave the starting line wanting to shoot one way or the other only to come and find out the rear end is crooked......

its kinda the poors mans 4 wheel alignment.

You didn't mention a front bar. Without one you'll have serious understeer. Great for the strip but no fun on the street.

yes the car has a front sway bar. also the rear end was changed out for a moser 12 bolt. when i had the body off the frame there was no evidence of a twisted or wrecked frame. everything looked to be factory square. not real sure how to resquare the rear end if it is out of whack. ill try the string idea and see what i come up with.

your better off going from the rear housing mounting points to a fixture hole on the frame towards the front of the car.

the factory has specific fixture points, and they measure to them to make sure everything is lined up correctly.

I know them on the camaro, but not the chevelle.

if i find that the rear is in a little off, how would i fix this, i dont have a clue. would the frame have to be bent or brackets cut off and relocated. also what would out of spec be concedered. 1/4" 1/8"? thanks Dave

Originally posted by sheetmetal:
if i find that the rear is in a little off, how would i fix thisAdjustable lower control arms is the only way I know of.

Tim.

Dave,
find out how much its off before you start worrying about it, it may not even be the problem.

After that i can look up the tolerance in my Chassis book, but i lent it to a friend at the moment.

dave,
I've been doing more thinking on the spindle problem.
think about this, under acceleration weight would be shifting towards the rear and the suspension would be lifting up, the bottom of the left tire would be going in, and the car would inherently start driving left, becuase of this.

i think this may be the problem.

Keep in mind, with weight on the wheels, the bearings are riding on the bottom of the spindle.

I would solve this problem, and while your checking things make sure the rear is square in the car...just to be sure that it isnt the problem.

i agree Brian. this is what the guys at wolfe racecraft had pointed out to me today when i called them. i will address this issue before i go with the anti rollbar. thanks for taking the time to talk to me. Dave

Was the car driven prior to the rear end change or is this the first time on the road?

I would check front end alignment, and make sure the upper adjustable bars are equal length. To much pre load on the wrong upper bar (upper drivers side) will cause your problem too.