That's a good idea. Thanks for the compliment.

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Thanks for the kind words. :cheers:

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Ron, another general question.

When taking the measurements to perform all of these calculations, what amount of "error" can you tolerate? There are so many variables here, and the easy answer would be none. But in the real world, that's just not possible. Even down to the clearances for bolts through holes, 'slop' in the various components or the suspension components, play in the steering rack, etc will add up to easing hundreths of an inch in some cases...

So I'm curious, with all of this great information and technical analysis, at the end of the day, how do you deal with those variables, and how much tolerance do you build in to your systems?

I can't say we approach the measuring project with any tolerance in mind. When we're doing the process on an existing car, literally on the floor, we use tape measures, plumb bobs, levels, digital inclimeters & even lasers. We measure to the 1/32" where we can.

On our chassis jig, which has a surface within .003" ... and it's easy to get right at things, we use these really long 18" digital calipers, so we're measuring in the thousandths.

It's funny, you can be off on some measurements 1/4" ... and the roll center doesn't change. And on other measurements 1/16" makes a noticeable difference.

I always advise guys to be as accurate as you can, which requires patience more than anything. If you can get your measurements within a 1/16", you're doing good.

Also, When we're measuring a car we're running ... we want the real numbers ... warts & all ... because we have to deal with whatever is "out" or "off" about the geometry.

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So Rob, I'm wondering after all of this potent suspension intel are you still going to be runing 285's up front? :lostmarbles: :lol:

Yep

The largest wheel I can fit up front is an 18x10.5". The best fit in tires for that is a diminutive 285 35 18.:lmao:

I will suffer the consequences of the miniscule amount of grip that tiny tire will provide up front.

I am making a couple of small changes at the rear of my car based on all the intel.

And none of them include leaf springs.:action-smiley-027:

:cheers:

I found your solution!

http://www.speedhunters.com/wp-conte...ed1_0tAh_3.jpg

WTF!!!??:superhack: :buttkick:

LOL.......Touche.

Just to be fair I'll start to post up a couple of changes I'll hopefully get done before my August 11th track day later in the week. I'm sure you'll find something to jab me about(other than leaf springs....that cards been played) :cheers:

Well for the near future your lap times are guaranteed to be way faster than mine no matter what you do.

It may be possible to beat you with a 195 45 15 :lol:

http://i291.photobucket.com/albums/l...psd0ede11f.jpg

:cheers: