smlporsche

I had them at one time but can't seem to find them.

Getting stiffer springs installed...

Thanks, I want to make sure my shop gets it right.

LVDell

Come on Eddie, if your shop can't get it right, they shouldn't have your business!

BTW, my car was just CB'd and my guy (Greg Jones) got my cross at 50.2%!!! The 3 weighed in at 3020 w/o me. I really need to get some pounds off that pig

Larry Herman

This could be an interesting topic. Conventional wisdom is to make sure that the diagonals (LF-RR & RF-LR) are equal. This will prevent the car from see-sawing across the diagonal, like a chair with one leg too short. This generally keeps the balance of the car the same in left and right hand turns.

What it may do as well is to put uneven weight across the front and the back. In that case, you need to make a decision as to how much "out of balance" you will accept in order to have more even braking. Everything is a compromise.

LVDell

Short of just adjusting the ride height at each corner to CB the weight as best as possible, you can look into "shifting" weight by physically "relocating".

Lemming

You are going to like the 600lb springs all around. After installing mine I managed to get within 0.2% all around - don't you just love the balance of a front engine P-car

http://www.nsxprime.com/FAQ/Performa...nerbalance.htm

http://www.elephantracing.com/techto...nerbalance.htm

http://vintagebus.com/cgi-bin/balance.cgi

http://www.356racing.com/balance.html

Larry Herman

Not when I'm braking from 150 to 45 for a hairpin.

DAR951

Here's the best single source I know, from GRM: http://www.grmotorsports.com/news/01...er-weights.php

trackjunky

+1

A good corner balance also involves driver feedback. This is the same as a good alignment. The compromise talked about by Larry also depends on your driving style, whether the track has more left or right turns, which turns are high speed "loading" turns vs turns that don't really load the suspension.

Good "diagonals" ensures proper ride height across corners, but it does not ensure proper weight distribution per corner. A shop can get good diagonal numbers but really screw up the corner weighting/balance of a car.

Veloce Raptor

The one big advantage of ensuring proper ride height across corners when loaded is to minimize any changes in camber. IMO, having 50.0% crossweights is more critical in front engined cars. Having less difference between LF/RF and between LR/RR weights is more critical in 911-style cars.

smlporsche

See I don't have that problem at all Larry..... If I ever reached 140 I'd probably have a code brown moment !!

But w/ 245's in front and Turbo S calipers I can break with the best of them

RedlineRay

The first book I read on corner balancing and set up was "How To Make
Your Car Handle" by Fed Puhn and is sold by HP Books. I believe it will give
you the concept on balancing your suspension.


Steve

Noel

The best analogy I heard was comparing corner balancing to that of balancing a wobbly four leg stool. If you place a scale under each leg of the stool, then the cross weights will not match since the stool wobbles. You simply lengthen and shorten the legs to get the cross weights close enough so the stool doesn't wobble. How much you adjust the length of each leg depends on your starting point and how long/short you want to the stool to be when you are finished.

smlporsche

The links posted didn't really give me the directions I was looking for. This is what I rember of the process. Feel free to correct / add.

1. Set tires to hot pressure
2. Disconnect sway bars
3. Have fuel level where desired (for me that's just under 1/2 tank)
4. Put driver balast in seat and move seat to driving position

The goal would be to get the diagonal weights within 5 to 10 lbs of eachother once base ride height is set.

Comments? Please be gentle

Cris Brady

Eddie, here's a thread about that very subject a few months ago:

https://rennlist.com/forums/racing-and-drivers-education-forum/387502-corner-balance-scales.html

kurt M

Unlike the stool the car has stuff in it and not all in the center.

some things to keep in mind there are plenty more. Be sure to check and even out tire pressure, unhook sway bars, and load your body weight in the driver seat before doing anything. Bags of sand inside plastic bags work well. Roll the car back and forth and bounce it some after each tweek.

IIRC Smart Racing had a good online guide at one point.