I used corner weighing scales on my 91ss

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ciper
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I used corner weighing scales on my 91ss

Post by ciper »

I put my 91 5mt sport sedan on the corner balance scales. The only changes from stock are:
Both sunvisors are not installed (mounts are still in place)
Plastic engine cover removed
2002 WRX 16x6.5 wheels with 205/55r16 Bridgestone RE960AS Pole Position
No spare tire (still have jack and factory tools)
Glove box full of paperwork, umbrella and bottle of oil in trunk
Full oil, coolant, 1/3 wiper fluid, 1/3 gas

Image
I left my spare tire at home so I weighed the car a second time with a 32 pound 175/70r13 wheel and tire.
Image


My feeling is that relocating the battery against the seat back and next to the right rear strut tower would really help the balance of the car (and move weight closer to the pivot point of he car)

Edit: The numbers between the weights are percentages comparing the opposite side (front to back, left to right etc)
SILINC3R
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Re: I used corner weighing scales on my 91ss

Post by SILINC3R »

Have you factored in you weight though?
Tony
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91 SS rio red R.I.P
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92ss satinsvoice wrote:LOL! that block was like F*** THIS! IM OUT!
mike-tracy wrote:Word. I'd love to get my hands on one of those trannies, but I just can't stomach the cost
ciper
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Re: I used corner weighing scales on my 91ss

Post by ciper »

I did factor in my weight when deciding on the optimal battery location.
If I get some free time Ill try to disconnect the battery and put it in that spot and weigh the car while sitting in the drivers seat.
MConte05
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Re: I used corner weighing scales on my 91ss

Post by MConte05 »

Interesting numbers. I have a picture of my rally car weight with a full cage in it on each corner too. I'll try to upload the picture when I get home since I am at work right now, but the numbers are as followed:

LF: 843 ......... RF: 800
LR: 618 ........ RR: 630
.........Total: 2891........

That is with a full roll cage, racing seats, stripped interior, battery relocated behind the driver seat, rear crash beam removed, front crash beam stripped of unnecessary weight, coilovers, 15" rally tires/wheels, and front door cards still in there. I was not sitting in the car, but the balance shouldn't change terrible except maybe front to back since I always have a co-driver who is of similar weight (I am up about 15lbs on him).

Looking to drop another 200lbs by stripping the doors, lexan windows, cutting out the rear deck, cutting out the support structure for the hood and the trunk, as well as removing any excess wiring when I redo the whole harness.
Last edited by MConte05 on Wed Apr 11, 2012 7:28 pm, edited 1 time in total.
SILINC3R
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Re: I used corner weighing scales on my 91ss

Post by SILINC3R »

Is this your own scale? I think these are a good investment.
Tony
90 LS Spec rio red sold
91 SS rio red R.I.P
90 Mazda Miata
2005 GT SWP
92ss satinsvoice wrote:LOL! that block was like F*** THIS! IM OUT!
mike-tracy wrote:Word. I'd love to get my hands on one of those trannies, but I just can't stomach the cost
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Re: I used corner weighing scales on my 91ss

Post by Legacy777 »

Does the weight shown on the scales include you sitting in the driver's seat?

Now that I think about it....since these cars are likely originaly designed for RHD markets, whose to say that the weight distribution is not also optimized for RHD markets. I think it would be interesting to see what the numbers do with only somone in the passenger seat. I know that doesn't take into account the dash and other changes, but it'd be interesting to see. It may not make a big difference since you've got dash, steering wheel, etc to move to the right side as well.
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ciper
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Re: I used corner weighing scales on my 91ss

Post by ciper »

SILINC3R wrote:Is this your own scale? I think these are a good investment.
From the shop. They are cool but often cost $1-2k. Even though they are aluminum it is difficult to carry more than two at a time since they are so heavy. If you go for wired units it is cheaper but the wireless ones I used are about 1600 http://tinyurl.com/7jj4ajc
MConte05 wrote: LF: 843 ......... RF: 800
LR: 618 ........ RR: 630
.........Total: 2891........
Nice weight! Seems like you need to lengthen the RF spring slightly.
Legacy777 wrote:Does the weight shown on the scales include you sitting in the driver's seat?
No I was not in the car for these pictures.
Last edited by ciper on Thu Apr 12, 2012 5:28 am, edited 1 time in total.
ciper
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Re: I used corner weighing scales on my 91ss

Post by ciper »

New weights while I'm sitting in drivers seat in text format (easier to compare). These scales seem to have +-1 pound margin of error which can be shifted around by shaking the car.

With battery in standard location
LF 916 .... F 57.9 .... RF 960
LS 48.4 .. W 49.8 .. RS 51.6
LR 618 .... R 42.1 .... RR 630
.........Total: 3242 ........

With battery in next to right rear strut tower against back seat
LF 902 .... F 56.5 .... RF 926
LS 49 .. W 49.8 .. RS 51.0
LR 685 .... R 43.5 .... RR 724
.........Total: 3237 ........

With battery in next to right rear strut tower against back seat and 32 pound wheel/tire from before
LF 899 .... F 55.8 .... RF 924
LS 49 .. W 49.8 .. RS 51.0
LR 703 .... R 44.3 .... RR 744
.........Total: 3270 ........

Realize this is on old suspension (rubber between springs and perch) that isn't adjustable. Coilovers could tame some of the weird weight shifting. Now that I look at all the numbers it seems the best location for the battery might be on the LEFT rear strut tower.
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Re: I used corner weighing scales on my 91ss

Post by jamal »

light battery > relocated battery.

About the same weight as my 2nd gen. Think it was 3070 or something.
SubaRally54
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Re: I used corner weighing scales on my 91ss

Post by SubaRally54 »

This is truly awesome info... how much should I be looking to spend on a weigh in? and are we talking brake and front end shops?
MConte05
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Re: I used corner weighing scales on my 91ss

Post by MConte05 »

If you just want a weight, any truck scale on the side of the highway will do that for you. If you are wanting corner weights, usually only race shops have that kind of equipment.

This thread reminded me that I need to get my car corner balanced soon. :)
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