Can anyone tell me in layman's terms how to determine cross weight? All I have is the four corner weight numbers. Should be all I need , right?

Just like it like it implies Brian just add rr+lf and rl and rf and you got it

Simple enough. Unless there is a big difference in corner weights I guess. I suppose that's what they mean by setup. Thanks man. Brian P. did it correctly. Wasn't questioning his ability, he wasn't sure himself.

Anyone dare to reveal if 45 lbs difference in lf to rf corner weight is too much.

I would rather have that split on the back if you can get it there. Within 10 lbs would be my goal.

Never actually done it before but common sense would tell me that it is going to be difficult because it is heavy on lf and light on rr. Maybe I'm overlooking something obvious though.

Heard I was missing lots of interesting posts so I thought I'd better log on.

You didn't get that book yet, did you Brian? Don't let the title fool you, it will help your SM racing experience.

While you cannot change the amount of weight of any side of your car, you can change how much of it a particular tire is supporting.

By this I mean, unless you physically move stuff around, the total left side (or right), and the front (or rear), will always weigh what it is now. But you can change the percentage of weight that is shared by each tire.

The balancing act is to maintain the current (hopefully correct) ride height. I am sure one of the setup guys will explain the math involved. It's not hard, but the experts here could explain it better than I.

Brian I always concentrate on the front, you want the rear to be close also but the front end takes the initial set of the corner and determines how the back will behave once that initial set has been taken.

Just as a check, have you considered driver weight?

His numbers are with him in the car. We put it on the scales at the track. Just to get his corner weights.

Just an FYI: The scales have to be dead level to read anything meaningful into cross weight measurements... not sure the tech shed set-up would be even close to level, they only care about total weight (which is unaffected by how level or not level the pads are).

Just my 2 cents worth.

Yeah Andy I wondered that myself. The numbers I think lean toward reality as the rf keeps locking up. Hard to say. Might just be me. They seem to be fussy little bitches. I definitely am going to get the book. My guess is there is no way to adjust heavy on lf , light on RR, without moving some weight around? My battery is shot, maybe I should get a bigger one.

RF locking up early? Sounds like a Miata

_________________
Charles

Brian...I know you don't like computers but have a look at this for your phone...

http://carsetup.wpengine.com/

That is a very important fact to consider! The corner weights from the tech shed are useless in most cases. The totals for the front, rear, left, and right will still be correct though.

Cool Kevin but I don't have a phone. Old school remember.

Robert I guess actually no numbers would be correct other than total weight. I got to get that book. Gerald offered me his bathroom edition or maybe he meant his pit edition. Andy offered his as well. Don't like to borrow anything. That fellow have a number I could call and order one?

Young man from Ontario, know how that is accomplished? PM me with your secrets.

Second that Steve P.

Hey Brian, the best setup guide you're going to find is already posted on the ARMS homepage as the 'Spec Miata rules - Appendix D'. Here's the link:

http://www.armsinc.ca/documents/race/ru ... _GUIDE.pdf

Written by one of the founders of the class, and a very successful SM racer.

Good luck!

That's been here the whole bloody time? Sorry guys. Don't stop with suggestions non the less. There is more than one purpose to my posts.

Thanks Andy. You may have just surpassed Brian P.

Sorry Brent, I just assumed that you knew about that guide
While a bit dated that guide will not send you astray.
Here's the web site I was talking about... http://www.advanced-autosports.com/inde ... page&id=18
Says you can call fax, e-mail, or use carrier pigeon

Michael: I think it has to indicate the correct totals per side no matter the degree of error per scale height, up to the point that the center of gravity height and moment center start to get effected ( like a 400mm difference or something)