steve porter

Hi guys, I thought you might be interested in this. I managed to borrow a set of scales to check C.W. today . I have recently installed Bilstein H.D + H&R progressive Springs in mine & my mate has fully kitted his 3.2 out with elephant racings spring plates & bushes new shocks etc . Mine first and all within spec with an ideal 50% Cross. don`t laugh but it was a bit of a letdown as I was all geared up to fix things . leave it alone and hope Dave`s is out.
3.2 was out at 46%, Ripper, out with the spanners (there`s no point going to all this trouble and not fixing anything) 40 kg diff R to L rear and 12 kg diff front even though everything measured spot on. surprisingly little adjustment is required to even everything up 2mm here and 4 mm there . about an hour later and we had it at 49.8% Cross. pretty close without stuffing up the ride height too much. I can highly recomend doing this as if its OK at least you know and if not, pretty simple to fix.

Steve Weiner-Rennsport Systems

Well done!!!

Assuming that your swaybar droplinks were disconnected (if you have adjustable ones), those are truly excellent figures.

steve porter

Hi Steve ,I have the std sway bar and the bilstein droplinks however I Installed 2 extra locking rings on the rear so that i could set the droplink position independently of the spring perch pos. as it did not look right to me with what bilstein supplied. as it is I have the droplinks lining up with the shocks when loaded
Do I need to check again with sway bar disconnected ? its no big deal as i can easily borrow the scales again .

Thanks steve

CalvinC4S

We used to,

disconnect sway bars.

rock each corner up/down to settle the springs back down after jacking it up on the scale. Best to drive it on to the scale if you have ramps.

Put the driver in and adjust.

Dubai944

Hope you allowed for the weight of the control box sitting on the right fender

steve porter

not at first but lifted it and it was .5 kg diff

DanQ

If you scale it again, you might want to try and center the tires on the scale. Some scales can read inaccurately if weight is on the edge of the scale...

trophy

+1

For accuracy:

1: Disconnect sway bars
2: Center wheels on pads
3: If you have to jack and lower car onto pads - rock to settle suspension
4: Put driver in car (or equilivant weight)

As you have seen a couple of mm can make a big difference in the corner and cross weights.

steve porter

Thanks everyone for the info I will borrow the scales again and have another go.
It will be interesting to see what differences there will be.
Steve

DanQ

Also, forgot to mention, to remember to level the scale platform. The pads all need to be level with each other or the corner weights will be off. I've used asphalt floor tiles under scales when using my garage floor (if the scales didn't have adjustable feet). The floor itself isn't level enough. You will need a long straight edge that will hold a level and is long enough to reach from pad to pad

trophy

Good point, I assumed they were level.....

Gasser

Leveling stands are not that expensive and really help getting a perfectly level surface for doing a "good" job.

Get a really long level or a very straight piece of aluminum to lay your level on and check every direction so your surface is perfectly flat.

Good luck.

Mike J

Did you do a pass, go for testdrift and then remeasure?

Also, how much fuel was in the tank?

Nice job though...want to get a set of scales for the shop!

Cheers,

Mike

NC TRACKRAT

Preaching to the choir here but, if you have adjustable droplinks, remember that swaybar arms should be close to horizontal and droplinks on both sides should have no pre-load on them. This should be done with driver's weight and and at least 1/2 tank of fuel. I save old brake rotors to load my weight in the car by placing them on the floorboard and, with a thick blanket, on the seat bottom...or you could use barbell weights. It really makes a difference with regard to handling.

race911

C'mon, no one keeps a dead body in a freezer to properly cornerweight?

I just picked up a set of leveling pads from a racer friend. Wondering why I waited so long to get some.