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Author Topic:   Very technical front end question.
Bigdog
Member
posted March 14, 2000 08:50 PM
I would say that they definitely need to be level. Otherwise, your caster settings will change throughout the motion that the suspension travels. That's not something I would want to have to deal with. If they are level, this means the a-arms go straight up and down, which tells me the settings will not change throughout the motion.


Bigdog
Member
posted March 15, 2000 05:06 PM
It wont matter too much on the length. They make different lengths of a-arms to accomodate any setup. I would leave them in the stock location. Just correct them. Are you building this for IMCA or what?

[This message has been edited by jammin (edited 03-15-2000).]

Bigdog
Member
posted March 15, 2000 06:22 PM
The reason I was asking, IMCA requires unaltered oem front ends, so the perch needs to be fabricated well, or you might have some problems passing it.

[This message has been edited by jammin (edited 03-15-2000).]

race8k
Member
posted March 19, 2000 08:58 AM
Jammin doesn't IMCA allow you to move the upper a-arm? Bigdog we cut off the stock mounts and run the new ones at the same angle as the lowers.You then run an offset upper arm . The mount location will be determined by your front end settings. Be sure to give yourself enough room.


roostertail
Member
posted March 19, 2000 09:36 AM
Just a question. If the factory raises the front 1 inch to keep the car from dropping under braking, and raising under throttle. would it not make sense to leave the left side level and raise the right side? Just a thought.



jammin
Administrator
posted March 19, 2000 09:37 AM
I guess so, because most mods I have seen were set up that way. But doesnt it have to be the stock perch?


roostertail
Member
posted March 19, 2000 11:07 AM
I don't think the stock perch is used by most builders, but I think it has to remain in the stock location. which to me implies general area. I know Dirt Works uses stock perch but only so they could use a stock a-arm in a pinch.



jammin
Administrator
posted March 19, 2000 12:44 PM
I think in some cases though, you can redo the stock perch and locate it where you would like it.


BIG B 46
Member
posted March 19, 2000 10:50 PM
Somebody forgot to add shorter upper "A" arms give more camber gain


Brave
Member
posted March 28, 2000 09:40 PM
I realize everything you are saying about upper control arm mounting points, but you must keep in mind ALL chassis builders are going to do the least amount to mass produce these cars as fast as possible. I replace the mount, level and parallel the shaft with the centerline of the chassis. set the front end by measuring the ball joints fwd 1/4 to 3/8 On the left front upper and backk on the rt front 1/2 to 3/4 and weld the brackets into place brace as you feel necessary. 1/4 out at the top of the tire LF and 1/2 to 3/4 in at the top of the tire RF. use a 4 ft level as a reference point.


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