Chalky

I put my z06 a set of scales today. Didn't have time to complete the job but got some initial corner weight numbers.

Car had been lowered so the base numbers are meaningless. Hoping someone may have done a 4 corner balance and has before/after numbers.

With 3/8 of a tank car weight was 3150, front to back was 52/48%. Corner weighting was way off but I don't know if GM is driven by this in factory setup or more to equalizing ride height front & back.

Intersted in any feedback from other experiences.

RAFTRACER

make sure those scales are level or the #'s mean nothing. 3/8 of a tank will make the left rear heavy as all of the fuel is in the left tank... GM doesn't give a crap about corner wieghts...........Dont forget to put the drivers wieght in the car.

Chalky

What, does the gas tank empty right and then left? I thought with a tank close to half I would be fairly nuetraL fluid wise.

Scales were level. Guy who owns the shop where we did it races and build cars, midgets, etc.

Car was also cross jacked quite a bit. I did manage to balance that out. Just like to compare some numbers and see what a stock setup is like if possible or a corner weight after a balance.

VetteDrmr

There are two tanks in a C5. The left feeds the engine; the right feeds the left tank.

Have a good one,
Mike

UstaB-GS549

Should tanks be full for corner weighting?

RAFTRACER

When I scale they are either empty or full...........the drivers wieght is in the vehicle and at least one sway bar end link from the front and the rear are missing........

gonzalezfj

Danny is on the ball, as always. You will need adjustable sway bar links so they can be adjusted to neutral after the corner weighing is finished. Make sure one of them is disconnected while corner weighing and you have the equivalent driver's weight on the seat. We use old rotors as weights.

Frank Gonzalez

Chalky

Live and learn. Sounds like no use adjusting without adjustable endlinks for swaybar.

Makes me wonder how many shops corner balance stock suspension C5's without the adjustable links!!

RAFTRACER

You can corner wieght without endlinks.......you will just end up with large amounts of preload in your sway bars.

WNeal

I dont know chit about the numbers you guys are talking about but after Dan lowered, balanced and aligned my car, I took 6 seconds off my lap time at Putnam this past weekend.

mlongo99

Won't that end up changing the ride height?

Chalky

He make house calls or Wisconsin calls? I am right on teh way to Road America from Ohio!!

Cape Cod Bob

I went the easy route and had Phoenix Racing do my car. Had to get adjustable end links for the job to be done. The C5 adj. end links work just fine on the C6 Z06.
They also know how to account for the gasoline tanks and driver weight. Very impressive bunch!!

Hey Danny, did ya ever get my PM???

Bob

Bob 33

Cape Cod Bob,
Your name, yellow Z06 and address look familiar. I think that we were at Phoenix/Palm the same day having the same work (corner-weighting and allignment) done. I'm the guy with the Silver 03 Z06. I followed the advice of those in the know and went where they did--the Pros at Phoenix. My ride is now much more predictable and precise. Aside from the work I had done there, I also got great, low cost "private lessons" in things Corvette.

Bob 33

RAFTRACER

I dont believe I can take all of the credit for your time reduction......a little extra experience, and the lead -follow you had going on with Sam probably had more to do with it..........I am absolutely sure that the car was significantly better though, but not 6 sec. Congratulations

RAFTRACER

Well yeah, unless you are adding wieght , adjusting ride hieght moves wieght.

Chalky

RaftRacer:

Do you shoot for pretty much equal weight on each wheel?. I am showing 52/48 front/back with a 3/8 tank of gas.

I would like to know what a stock Z06 looks like on the scales.

Supercar

Corner weighing only moves the weight from one diagonal to the other. You want those about equal for a track with an equal number of right and left turns (if those exist). Some also try to set the front wheels equal for better braking. Corner weighing will not change the front/rear weight distribution by more than a few lbs, and that will be mostly due to the suspension fore/aft movement.

Ride heights are set separately from corner weighing based on the desired ground clearance, suspension kinematics and aerodynamics.

RAFTRACER

Equal wieght not likely to happen on that car unless you are ballasting vehicle . Diagnal totals = 50% of total vehicle wieght is what you will be after. Set vehicle desired vehicle trim height first and then obtain 50.0% cross and you will be in buisness.

gonzalezfj

Yeah, I'm lazy too and let Phoenix do my cars. Either Phoenixville (Mark) or Palm (Kurt) can do a first-class job.

Frank Gonzalez