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Re: Scale for Chassis Set-up [Re: tabletop390] #2472770
03/27/18 02:35 PM
03/27/18 02:35 PM
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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CMcAllister Offline
Mr. Helpful
CMcAllister  Offline
Mr. Helpful
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Joined: Dec 2005
Posts: 11,408
Fulton County, PA
It's really not magic. It's a tool to help you see what your eyes can't, like data logging or video. Scales will help with diagnosing a problem if one should creep up. Dead springs, jammed up shocks, bound up suspension, bent or broken parts, all will show up, especially if you know where you started. They really allow you to put the weight where you think it should be, based on a lot of the variables in your particular situation. On new construction or after large changes, moving ballast or whatever, a baseline set-up can be established that will hopefully be close to what the car wants.

Taking it to the track and observing will be needed to do any fine tuning. I'm not disappointed if it needs a touch up once it gets to the track. It's not unusual. Knowing the baseline and the potential effects of any changes, typically you can make a tweak or two at the track and correct it without having to put it back on the scales. Knowing what you started with and where you need to go is helpful. The effects of ballast in different locations can also be noted. Getting the car to go down the track, straight and square, is the benefit. It really has little to do with ICs or shock adjustments.


Moving 5 or 10 pounds a few feet can make a surprising difference in how a car works. On some cars, it's the difference between blowing the tires off and putting it on the bumper. Knowing what a half a flat does, one way or the other, is also good information to have. Once the car is dialed in, it's easy to put it right back where it was if something needs to be worked on. Once you've used scales to keep track of the balance and it's effects, you know what the car likes, and it's easier to put right back on point, rather than having to fool with it every time something has to be taken apart or changed. If something does goes south, you can check to see if something has moved. It shouldn't.


If the results don't match the theory, change the theory.
Re: Scale for Chassis Set-up [Re: tabletop390] #2472811
03/27/18 03:29 PM
03/27/18 03:29 PM
Joined: Oct 2004
Posts: 2,799
Connecticut
FurryStump Offline
master
FurryStump  Offline
master

Joined: Oct 2004
Posts: 2,799
Connecticut
Longacre, used couldn’t say no to the deal.


best of 11.39 at 117 mph 1.60 60’. 68 340 S Barracuda Fastback F.A.S.T [IMG]http://i67.tinypic.com/2mnnnnt.jpg[/IMG]
Re: Scale for Chassis Set-up [Re: Cab_Burge] #2472868
03/27/18 05:41 PM
03/27/18 05:41 PM
Joined: Jan 2004
Posts: 4,539
Motor City
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6PKRTSE Offline
master
6PKRTSE  Offline
master
6

Joined: Jan 2004
Posts: 4,539
Motor City
Originally Posted By Cab_Burge
Originally Posted By 6PKRTSE
Every single car we have scaled for the first time makes it best pass first time out on it's next pass.

Do you mind sharing what you do to get these results, PLEASE bow grin work


Pretty much what CMcAllister said. It helps adjusting the suspension, setting preload, moving weight around as needed. etc.


1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: Scale for Chassis Set-up [Re: tabletop390] #2472886
03/27/18 06:05 PM
03/27/18 06:05 PM
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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CMcAllister Offline
Mr. Helpful
CMcAllister  Offline
Mr. Helpful
C

Joined: Dec 2005
Posts: 11,408
Fulton County, PA
These big power, radial tire, no wheelie bar guys are the ones concerned with where every pound is in the car. Classes with a minimum weight know what they have to work with and it's a matter of getting it where it's most beneficial.


If the results don't match the theory, change the theory.
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