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Author Topic:   ride height/a-arm angle?
KK17
Dirt Freak

Total posts: 229
posted May 12, 2005 08:21 PM  
I run a full size metric frame with stock lowers and spindles with big chrysler s----in ball joints and small s---- in uppers...my question is when setting the ride heights recommended by manufacturer(5 3/4" from bottom of underslung to floor on rf and 5 1/4 lf) the lower a-frame outer pivot(ball joint) is 3" higher than inner pivot point...I tried mapping out my rollcenter and by my unscientific results, it ends up being on the ground and about 8" to right of center line..I searched topics and found a few on the subject of ride heights...thought about running A-arms level? any ideas appreciated..thanks Erik

dirtslinger66
Dirt Maniac

Total posts: 200
posted May 12, 2005 08:46 PM  
If I remember correctly of the top of my head my right is 21degrees up toward the spindle and the left is like 18*

rpm20
Dirt Freak

Total posts: 338
posted May 13, 2005 04:35 AM  
I HAVE ALWAYS BEEN TOLD AND ITS SUPPORTED BY MANY MANUFACTURERES THAT THE LOWERS SHOULD BE CLOSE TO LEVEL WITH THE DRIVERS SIDE INNER PIVOT POINT ABOUT 1/4" LOWER THAN THE BALL JOINT AND THE PASS SIDE ABOUT 1/8" LOWER THAN THE BALL JOINT OR CLOSE TO LEVEL.
THIS WILL PLACE YOUR ROLL CENTER AT ABOUT 3" ABOVE GROUND .


quote:
Originally posted by KK17:
I run a full size metric frame with stock lowers and spindles with big chrysler s----in ball joints and small s---- in uppers...my question is when setting the ride heights recommended by manufacturer(5 3/4" from bottom of underslung to floor on rf and 5 1/4 lf) the lower a-frame outer pivot(ball joint) is 3" higher than inner pivot point...I tried mapping out my rollcenter and by my unscientific results, it ends up being on the ground and about 8" to right of center line..I searched topics and found a few on the subject of ride heights...thought about running A-arms level? any ideas appreciated..thanks Erik


wfoondirt
Dirt Forum Champ
Total posts: 505
posted May 13, 2005 07:31 AM  
Are you running different tires than the builders setup sheet? Measuring from the ground to the frame will change dependant upon the rollout of the tires. I typically weld a tab to the frame and measure from the a-arm to the tab to measure ride height instead of the ground. It's more consistant that way. In general you want the lower a-arm close to level unless the builder has some wacky geometry going on. Double check that you have the correct spindles/ball joints etc.

dirtslinger66
Dirt Maniac

Total posts: 200
posted May 13, 2005 04:46 PM  
Ignore my previous post I was thinking of the upper a frames. Yes the lowers should be level or very close to it.

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