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Author Topic:   A-arm Hole Alignment
killermiller
Dirt Full Roller

Total posts: 34
posted March 05, 2005 06:56 PM  
I have seen several chassis builders charge for this and was wondering what was involved in aligning the holes. I am in the process of building a new chassis and am looking for any new ideas that will help me out...Hope someone can answer this question for me.

snowman
Dirt Freak

Total posts: 241
posted March 05, 2005 07:31 PM  
The holes on the chassis are not perfectly in alignment with each other.......they are close enough for stock rubber bushings to work.......but not perfect.......

To "fix" them, they usually drill out one set of holes too big, hold some washers over the hole, slide a straight rod all the way through all the holes and weld the washers........so that all the holes are in alignment........

Removes any bind.......

Good Luck,
snowman

blanep
Dirt Maniac

Total posts: 105
posted March 06, 2005 08:13 AM  
If they charge very much at all to do this then consider doing it yourself. Reason being is that I've yet to build a metric chassis where I've had to correct the alignment. I have a 2 foot straight piece of 1/2" round stock that I use for nothing but checking hole alignment. Maybe I've just been lucky in the frames that I have gotten, dunno.

backwoodsracer
Dirt Forum Racer

Total posts: 88
posted March 06, 2005 08:41 AM  
I have used a 1/2inch rod to realign the lower holes after a wreck.used portapower and pushed it back untill the rod went through.You can also use it to check lower a-frames for twist and also to align solid bushings correctly.

killermiller
Dirt Full Roller

Total posts: 34
posted March 06, 2005 05:40 PM  
Thanks for the help. I am assuming that you are aligning the holes side to side, meaning rear right hole with rear left hole? BTW the charge for this was $100 by Terminater and another one I can't think of.

It does sound simple enough, Thanks

killermiller
Dirt Full Roller

Total posts: 34
posted March 06, 2005 05:42 PM  
Ok after I read your reply again I understand that your talking about the lower a-arm holes!!! I thought there was some way they were aligning the upper mounts

snowman
Dirt Freak

Total posts: 241
posted March 06, 2005 06:04 PM  
Naw.....most are just aligning the holes on the lower mounts and charging 100 bucks......as if it were some big "speed secret".......lol

Check it......as BlaneP has already mentioned, it may not need any "correction".......but that wouldn't stop some from charging the 100 bucks tho.......lol

Good Luck,
snowman

killermiller
Dirt Full Roller

Total posts: 34
posted March 06, 2005 08:43 PM  
Thanks Snowman...never hurts to ask though...lol its the only way to learn

southernfire
Dirt Roller

Total posts: 9
posted March 06, 2005 11:21 PM  
but you can move the holes in a certain direction to change the front end geometry slightly to gain a adavtage over stock but shh dont tell any one

[This message has been edited by southernfire (edited March 06, 2005).]

blanep
Dirt Maniac

Total posts: 105
posted March 07, 2005 05:09 PM  
Southernfire, I don't see how a person could alter the holes more than say 1/8" to change the geometry in a way which would be beneficial without creating a heckuva bind between the lower a-arm pockets and lower a-arm itself. UNLESS you're talking about moving both points in or out in the same direction which in my mind would only change camber and only could be done in a relatively small amount plus it seems there are several simpler ways to change camber than doing that. If you care to elaborate further then I'm always interested in hearing and learning.

340duster
Dirt Maniac

Total posts: 195
posted March 09, 2005 02:07 PM  
the other items you can change besides camber curve are: roll center location, and ride height

    

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