Chevelle front suspension help

[Loyaltyisking]

So I was trying to find some info about the space between the lower control arm bump stop and the frame.

I have a 66 Chevelle with CPP upper and lower control arms, and QA1 coil overs. I was wondering if any one had some thing I can reference as to what the space between the lower bump stop and the frame should be at ride height? Or any help with this? Im a newb in suspension related stuff. To give a little background- when I installed the coil overs i bottomed em out, so when I lowered the car to check the look I noticed the frames on the bump stop. I love how the car sits as is.. so what ever I can do to retain the height I want to try first. Again I am new to suspension. So dont get all crazy with the lingo..

[andrewb70]

So I was trying to find some info about the space between the lower control arm bump stop and the frame.

I have a 66 Chevelle with CPP upper and lower control arms, and QA1 coil overs. I was wondering if any one had some thing I can reference as to what the space between the lower bump stop and the frame should be at ride height? Or any help with this? Im a newb in suspension related stuff. To give a little background- when I installed the coil overs i bottomed em out, so when I lowered the car to check the look I noticed the frames on the bump stop. I love how the car sits as is.. so what ever I can do to retain the height I want to try first. Again I am new to suspension. So dont get all crazy with the lingo..

The position of the bump stop is not really relevant because different control arms put the bump stop in different places and the bump stops can vary in height. On A-bodies, you don't want the suspension so low that the lower ball joints are above the lower control arm pivot point on the frame.

Andrew

[exwestracer]

^X2^. Leveling the lower arms at ride height is the best starting point for the suspension.

[Loyaltyisking]

Well right now the ball joints are pretty much at the same level as the pivot point on the frame.. I should raise em right? Also if I raise em to where the ball joint is clearly under, would it be an issue if I trimmed the bump stop? (to get more suspension travel?) I know drag peeps do it. Would it hurt or help me? I want a pro touring car in the end

[Loyaltyisking]

^X2^. Leveling the lower arms at ride height is the best starting point for the suspension.

Leveling em to where their parallel to the ground?

[UMI Tech]

We put the pivot of the ball joint roughly an inch below the suspension pivots. This is a somewhat loose measurement as there are angles involved in the lower a-arm pickup pointa As the suspension travels in bump, the lower a-arm tends to stay flat or slightly past flat. This flatness, like Ray eluded to, minimizes track width change and just plain keeps things working properly.

[UMI Tech]

Oh, and don't forget due to motion ratio, roughly one inch of bump stop clearance yields two at the wheel.