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Author Topic:   Upper A Arm mounting
jmd98
Dirt Full Roller

Total posts: 52
posted October 18, 2004 04:19 PM  
I am running a metric chassis and am allowed to move the stock upper a-arm mounting bracket to help correct the geometry issues. What is the best method to do this? How far do I move them and in what direction? Also, is there any publications out there for this sort of thing? Thanx in advance.

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted October 18, 2004 10:26 PM  
I know Steve Smith Publications has a few books out. I have his open wheel modified book. It explains this in detail. I would check that out. But I do need to tell you that his books are just starting points and although most of the material is right, I have found a few things way off. But it will give you the basic knowledge of what your trying to do, also check the tool box on this website and download the roll center calculator to help you in this process.

[This message has been edited by FlyNLoIMCA17 (edited October 18, 2004).]

jmd98
Dirt Full Roller

Total posts: 52
posted October 19, 2004 08:22 PM  
Thanks for the info. I'll look into them. Is there any chassis builders here that can give some pointers?

bobaluuu
Dirt Freak

Total posts: 474
posted October 20, 2004 08:54 PM  
find a close reference point directly in line with the inside of the mount (in two places) measure it so that you can ref it later. be very precise. using whatever you wish cut the mount cleanly and evenly off the frame(we used a sawsall and 6" bimetal blade). clean up the frame rail and reposition the mount either 1 inch or 3/4 inch closer using the ref points mentioned above. tack weld it in three places. reinstall control arm and measure alignment
angles. if its correct weld it down, if not move it and remeasure. BEWARE the fuel line runs directly under this area. if your trying to get antisquat and more tecky stuff, then your on your own. It took us 30 minutes and thre blades to cut ours off but redoing it was easy.

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Light it up, Baby!

racer s
Dirt Forum Racer

Total posts: 83
posted October 21, 2004 03:25 PM  
check out circle track when I find it I will post the issue date but it said some things about lowering the mounts setting them to get caster and camber right

jmd98
Dirt Full Roller

Total posts: 52
posted October 23, 2004 11:36 AM  
Thanx for help.

    

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