Corner weight figures?
Turbo Mini Forums

Hey folks,

I'm knocking up a corner weight gauge (ala Alan Staniforth) at the moment from some leftover bits at work, as I only have a 400 psi gauge I need to scale the piston to suit, meaning I need to roughly know the (front) corner weights for a std weight mini.

Can you guys point me in the right direction please.

Cheers, Joe.

im very interested in this, sorry cant be much help, where did u get the info/design for this?

I've seen the future and tbh its Pie

I've got a 600psi one, I don't entirely believe the figures it gives, but we tend to just over-range it on the front (620-640psi) and get around 400 on the rear.

If you add that up you get around 2000psi, now I'm not entirely sure how to get that to kgs, but dividing by 2.2 gives you900kgs total weight, and I know its 300kgs lighter than that!! (I've had it on some propper scales in the past)

Wil

Edited by wil_h on 7th Jun, 2006.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I'm actually thinking of making an electronic corner weight gauge. After looking at the prices of them in deamontweeks I thought how hard can it be to make some. A couple of bathroom scales, a pic controller and bob's your knob. Still at the fag packet stage though.

sorry a bit OT

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

arrrrse looks like the 400 psi gauge is going to be too small!!!

Ive plumped for a 1000 psi gauge from ebay

http://cgi.ebay.co.uk/HYDRAULIC-PRESSURE-G...1QQcmdZViewItem

brings the total cost for the corner weight gauge up to £15!!

Regarding the plans for it, yes it was from alan staniforths book, on keith calvers website theres a suspicously similar looking sketch!

http://www.gr8website2.com/calverst/CC110F.htm

basicly I've made a cantelever with a mini clutch slave cylinder on the end connected to a gauge,

The area of the clutch slave piston is about 0.6 sq " meaning that a measurement of 100lb will be getting on for double that value in psi, hence the need for the bigger gauge.

The weight descrepency make sense to me, if your weighing one corner at a time by lifting it then to some degree you must be weighing the other corners too, so there will be somm overlap of what is being weighed. This is only for my road car really so acuracy isn't totally critical.

The home made pads sound interesting,though I reeeely hate paying out for stuff I can make myself!

When using mine I have a piece of paper to gauge whether the wheel is off the ground or not, that way there should be little overlap and you can get consistent readings.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

surely pumpin gthe tyres up hard as nales will also help here?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Yes, but ideally you want to have the tyre pressures as you run them when setting up the suspension.

I'd probably make bugger all differance , but I like to be consistant.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Pro set up equipment uses solid dummy wheels that either sit on the scales or contain them.

For home use or if you have just one race car, say a formula ford, i'd go for the cantilever type gauge. They are not quite as accurate as a set of pads, but a million times better than none. they are much cheaper. the only drawback is that you have to go around and check your weights everytime you make an adjustment, where the electronics you just have to look at the screen each time (much quicker).

When corner weighting you MUST have the car on a flat level surface. Be this a really level pieice of concrete or a dedicated setup patch.

As for where you set your corners, i.e., what weight where there are a couple of lines of thought. Its very unlikey you will find a car you can get the same weights on the front wheels and the same across the back 2.

We've just done ours with the cantilever type as I said above. For comparisons wheel-to-wheel it's great (if slow, and you need lots of space either side of the car). But it dosen't give an actual weight.

So today I 'callibrated' our gauge. turns out 80psi is around 56lbs. this gets our car to around 560kgs, which is believable.

We have also tried to get the weight across the front much more even at the sacrifice of the weight across the back being less even.

Wil

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

gonna have a play at this this weekend, will did out the source book, but realistically, how close should i expect to get the fronts and rears on the min?

cheers

joe

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

We get the fronts within 1 kg on the miglias

Team Racing

ah, would you know what that equates to in psi's?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"