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Author Topic:   Monte Carlo Frame
tothefloor20
Dirt Newbie

Total posts: 1
posted December 18, 2005 08:16 AM  
I bought a used 81 monte carlo off a guy this fall. I got the measurements from this website and found that some of the measurements werent quite right. A couple were off about 3/8" and some were as much as 3/4" off. I have talked to some people and some say it is junk and others say its okay. I want to be competitive, so I thought I would ask you all about it. Thanks

sideways
Dirt Forum Champ
Total posts: 745
posted December 18, 2005 08:54 AM  
Be a little more specific with which measurments were off.If it is in between the spring mounts and all the a frame mounts and such then it sounds bent.but have it checked with a person who has done this for years to see how bent or if its bent at all.It is very specific where on the holes you measure from.Follow the measurments to the T. hope this helps

john56h
Dirt Full Roller

Total posts: 55
posted December 18, 2005 09:07 AM  
Try to find a reference point that's the same on both sides of the frame rails, then measure to the rear axle. Make sure that the rear axle is square (same measurement both sides within 1/4" +/-). Be sure that the rear axle housing isn't bent if you get bad measurements. to determine if it is bent measure the toe out on the rear axle. If the housing is not bent you will find that the measurement across in front of the tires is about equal to the measurement across behind the tires (plu or minus 1/8"). If that checks out, then check the front lower control arm mounts. With the lower a-frame removed, all four of the bolt holes on one side should line up (the two bolt holes for the front bushing and the two bolt holes for the rear bushing). The best way to check is to insert a long piece of rod that's the same diameter as the bolts. If the frame is twisted, these holes probably won't line up, thus putting a bind in the suspension. If it's just off a little, you could repair by enlarging some of the holes slightly to allow the rod to pass through straight, then weld washers on (using the rod to locate them) to restore the original bolt hole size. Other than that, the only other things to worry about is whether the front frame horns are way out of wack. With the front wheels steered straight, measure across the front of the steering diagonally from center of pitman arm to center of right inner tierod, then measure from center of pivot at idler arm to center of left inner tierod. These two measurements should be close to equal (plus or minus 1/2"). If they ar not, check for bent centerlink, pitman arm, idler arm. If all the bolt on parts are straight the frame horns could be tweaked out of shape. This can sometimes be compensated for by placing shims between the idler arm and the frame. If they are way off, you could replace just the horn or horns if you know somebody who is a decent fabricator or body shop man. Good Luck!

marp
Dirt Roller

Total posts: 16
posted December 18, 2005 05:05 PM  
just get the thing ready and run it.the measurements you said were off can be compensated for like the above posts said.

only 4 months to go DANNY ya better get crackin and beat me done like you did last winter.

racer17j
Dirt Forum Champ
Total posts: 5502
posted December 18, 2005 06:01 PM  
just run it and see what happens i ran a bent car for 2 years just took some time to find out what kinda changes the old girl liked was never out of the top 10 in the 20 races i ran with it bent

  

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