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Corner weight system £40
Banana - 5/3/17 at 10:41 PM

In the true spirit of this site - how have people got on with individual scales to set corner weight?

Was thinking of getting four of these.
200 KG LCD Digital Electronic Personal Scale Glass Bathroom Weighing Body Scales

40inches - 5/3/17 at 10:51 PM

I found that digital scales time out I used mechanical Doctor Scales from Argos, about £20 each

loggyboy - 5/3/17 at 10:57 PM

Heavy Duty Industrial Digital Postal Scales Max Weight 200KG 440lb LCD Backlight

I suspect these would be safer.
Also if doing it really cheap buy 1 and do each corner at a time.

Nickp - 6/3/17 at 05:42 AM

quote:
Originally posted by Banana
In the true spirit of this site - how have people got on with individual scales to set corner weight?

Was thinking of getting four of these.
200 KG LCD Digital Electronic Personal Scale Glass Bathroom Weighing Body Scales


I don't think that one will be any good as it seems to have a raised area for between your feet. You want a nice flat surface. I got this one for the pricely sum of £14.99 and it works a treat - Used Ozeri Rev Digital Bath Scale with Electro-Mechanical Dial up to 200kg, Gr8
I've only used it to weigh the car a corner at a time and not made adjustments as yet but it seems just fine.

matt5964 - 6/3/17 at 07:10 AM

quote:
Originally posted by loggyboy
Heavy Duty Industrial Digital Postal Scales Max Weight 200KG 440lb LCD Backlight

I suspect these would be safer.
Also if doing it really cheap buy 1 and do each corner at a time.


I might be wrong but surely if you are weighing one corner at a time you will be transfusing weight to the other wheels as you will have raised one corner up shifting the weight giving an in accurate reading
(Unless you raise each of the other wheels up to exactly the same height, in which case you may as well get 3 additional scales)

Nickp - 6/3/17 at 07:19 AM

quote:
Originally posted by matt5964
quote:
Originally posted by loggyboy
Heavy Duty Industrial Digital Postal Scales Max Weight 200KG 440lb LCD Backlight

I suspect these would be safer.
Also if doing it really cheap buy 1 and do each corner at a time.


I might be wrong but surely if you are weighing one corner at a time you will be transfusing weight to the other wheels as you will have raised one corner up shifting the weight giving an in accurate reading
(Unless you raise each of the other wheels up to exactly the same height, in which case you may as well get 3 additional scales)


Just use 3 blocks of the same height as the scales and do one wheel at a time

loggyboy - 6/3/17 at 08:09 AM

quote:
Originally posted by Nickp
quote:
Originally posted by matt5964
I might be wrong but surely if you are weighing one corner at a time you will be transfusing weight to the other wheels as you will have raised one corner up shifting the weight giving an in accurate reading
(Unless you raise each of the other wheels up to exactly the same height, in which case you may as well get 3 additional scales)


Just use 3 blocks of the same height as the scales and do one wheel at a time

Exactly this. Yes you could buy 4 but thats hardly Locost!

[Edited on 6-3-17 by loggyboy]

907 - 6/3/17 at 08:30 AM

And 1 scale and 3 blocks will be dead accurate

where as 4 scales could give 4 different readings.






(Did mine with the One Scale Method)

v8kid - 6/3/17 at 12:59 PM

quote:
Originally posted by 907
And 1 scale and 3 blocks will be dead accurate

where as 4 scales could give 4 different readings.

(Did mine with the One Scale Method)


Only as dead accurate as the leveling process - if you are 1mm off level with 500lbin wheel rate you will be 20lb out! ( circa 10-20%) Admittedly that's a very stiff setup but you get the drift.

Cheers!

SJ - 6/3/17 at 05:11 PM

I bought two sets of really cheap mechanical scales - £4 each I think, and used one under each wheel. They went right off the scale but I marked them with pen and checked on one side and they read about the same, so then just a question of adjusting the shocks until the reading were the same on each corner.

Probably not very accurate but close enough for my purposes.

Oddified - 6/3/17 at 07:16 PM

quote:
Originally posted by loggyboy
Heavy Duty Industrial Digital Postal Scales Max Weight 200KG 440lb LCD Backlight

I suspect these would be safer.
Also if doing it really cheap buy 1 and do each corner at a time.


I bought the 300kg version a couple of months ago (otherwise identical), and with 3 blocks of wood, works very well. A bit of a faff moving them round several times but give repeatable results and with a bit of playing with excel i've got all the % differences, side to side, front to back, overall weight and even did unsprung weights to do some spring rate calculations. Cheap as chips to get some reasonable numbers to work with.

Ian

Banana - 7/3/17 at 09:11 PM

When adjusting each corner, don't you need coilovers with an adjustable perch at both ends of the springs?
As far as i can tell, Protech only have a lower one. Won't this just mess the ride height up when balancing the weight?

Bluemoon - 7/3/17 at 09:24 PM

quote:
Originally posted by Banana
When adjusting each corner, don't you need coilovers with an adjustable perch at both ends of the springs?
As far as i can tell, Protech only have a lower one. Won't this just mess the ride height up when balancing the weight?


No only need one "perch" adjustable. The process is iterative, there is an order that helps, something like add a turn to one coil over and remove a turn form the opposite coil over.

The iterative nature of this means having 4 scales would be quicker in principle to adjust but at x4 the price...

Dan

[Edited on 8/3/17 by Bluemoon]

loggyboy - 8/3/17 at 09:09 AM

quote:
Originally posted by Banana
Won't this just mess the ride height up when balancing the weight?

The two are directly related - its the height of the springs that force more weight on to that corner, and its about balancing that weight not moving it, thats not physically possible.

v8kid - 8/3/17 at 09:22 AM

quote:
Originally posted by Bluemoon
quote:
Originally posted by Banana
When adjusting each corner, don't you need coilovers with an adjustable perch at both ends of the springs?
As far as i can tell, Protech only have a lower one. Won't this just mess the ride height up when balancing the weight?


No only need one "perch" adjustable. The process is iterative, there is an order that helps, something like add a turn to one coil over and remove a turn form the opposite coil over.

The iterative nature of this means having 4 scales would be quicker in principle to adjust but at x4 the price...

Dan

[Edited on 8/3/17 by Bluemoon]


You can use packers above the spring if you find the ride heights are too compromised but as above it is an iterative process and generally if you need packers you have something else far wrong

Camber Dave - 8/3/17 at 01:41 PM

Quote
"When adjusting each corner, don't you need coilovers with an adjustable perch at both ends of the springs?
As far as i can tell, Protech only have a lower one. Won't this just mess the ride height up when balancing the weight?"

It is possible, and indeed the target to get the front ride heights within 1 mm, AND the corner weights to within 1% of each other
This ensures that the car reacts to the steering and weight transfer the same whether turning left or right.

The fine tuning adjustments are carried out at the rear.
As mentioned above the weight moves diagonally across the car BUT less 'fiercely' than adjustments at the front.
With an an offset driver, this usually means that the Right Rear wheel caries extra weight, and unladen, has a slightly higher ride height.