Virginia Motor Sport Club Discussion Forums

General => Technical Help => Topic started by: mikedamageinc on January 21, 2015, 02:48:29 PM



Title: Car scales and corner weight?
Post by: mikedamageinc on January 21, 2015, 02:48:29 PM
Just wondering if anyone has 4 corner scales or know where some are available to use cheap. I called PAS and they do a full race balance and alignment for about a grand. I'm sure they do a great job but a little more than I need, just looking for a decent shade tree balance.


Title: Re: Car scales and corner weight?
Post by: whiteryder on January 21, 2015, 07:27:52 PM

I know someone in the club has them.  If there are enough interested people
maybe we should put together a corner weighting party.


Title: Re: Car scales and corner weight?
Post by: wahoo5 on January 22, 2015, 07:28:43 AM
Several of us use Courtney Cormier. He is a National Champion autocrosser, autocross set-up guru, and head mechanic at Richmond MINI. He does a great job at a reasonable price. I sent you a PM with his email address.

David


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on January 22, 2015, 08:10:08 AM
Thanks David, I'll contact him and see. That also might be more than I need. I like the idea of a corner balance party though, it would be cool to hang and learn while others are doing their cars. Many hands would make light work for something like that too. It seems like it could be time consuming though, not sure how many cars can get done in a day.


Title: Re: Car scales and corner weight?
Post by: 2forSolo on January 22, 2015, 07:13:59 PM
The corner weight "party" is a great idea.  If it comes together I have a M3 that needs help.


Title: Re: Car scales and corner weight?
Post by: jloehlein on January 22, 2015, 08:31:31 PM
I have scales, but basically zero time in the near future.  I'm happy to donate the scales if someone I know takes responsibility for them.  They're not cheap and they're far from bulletproof - I dropped one and it cost me $250 to replace the sensor.

Alternatively, if we do this in the Spring (April?), I should have some time and the space to host.


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on January 23, 2015, 05:07:07 PM
I'm in no hurry, need to sort a few things so whenever you get to it, I'm in! Too cold to be hanging around outside now anyway.


Title: Re: Car scales and corner weight?
Post by: jloehlein on January 24, 2015, 03:51:12 PM
Yeah, I'm down to host something in the spring.  I'd guess we could do up to 3 cars pretty easily.  If I get a lift in by then, it'll go oven faster.


Title: Re: Car scales and corner weight?
Post by: 90efcivic on January 26, 2015, 04:32:35 AM
I would be interested in this also.


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on March 04, 2015, 06:43:07 PM
Seems like it would go faster if we just had ramps. Drive your car on, get the weights, get off and go make your adjustments and come back while others are getting their weights. Unless someone has the ability to adjust as it sits, too much time would be spent tweaking and going up and down.


Title: Re: Car scales and corner weight?
Post by: whiteryder on March 04, 2015, 06:53:15 PM

I thought the going up and down part was half the fun.   ;D


Title: Re: Car scales and corner weight?
Post by: jloehlein on March 04, 2015, 09:12:43 PM
Seems like it would go faster if we just had ramps. Drive your car on, get the weights, get off and go make your adjustments and come back while others are getting their weights. Unless someone has the ability to adjust as it sits, too much time would be spent tweaking and going up and down.

This is a good point.  Maybe someone will build me some ramps :)  Hopefully it dries out and warms up soon so I can get the garage wrapped up.


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on March 04, 2015, 10:12:41 PM
Seems like it would go faster if we just had ramps. Drive your car on, get the weights, get off and go make your adjustments and come back while others are getting their weights. Unless someone has the ability to adjust as it sits, too much time would be spent tweaking and going up and down.

This is a good point.  Maybe someone will build me some ramps :)  Hopefully it dries out and warms up soon so I can get the garage wrapped up.

give me the dimensions of your scales and I'll figure something out.


Title: Re: Car scales and corner weight?
Post by: jloehlein on March 05, 2015, 07:41:11 PM
The scale pads are ~2 5/8" tall with a 15"x15" footprint.  I have a set of wood roll-offs for it, but you still need to get the car in place, jack it up, put the roll-offs under the wheels, and position the scales before you can use it.  I like the idea of ramps a lot.  I guess if it was possible to drive over the rear set of ramps and onto the front set, we could crank out a bunch of cars pretty quickly.


Title: Re: Car scales and corner weight?
Post by: Marc on March 06, 2015, 07:27:05 AM
just a thought - here is a set of scale stands on ebay for $216...
http://www.ebay.com/itm/181528909266?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT



Title: Re: Car scales and corner weight?
Post by: sjfehr on May 31, 2015, 04:04:18 PM
Tidewater Sports Car Club had a couple corner weighting sessions at Tidewater Community College's auto center a few years ago that were really cool.  Wasn't so much about corner-weighting everyone's cars as teaching us how to do it properly.  Started with a 90 minute classroom session covering race car dynamics and why corner balancing is important, and then we corner-balanced two cars for a demo using the club scales.  Maybe y'all could do something similar?  (Shoot, maybe we should do it again at TSCC, it's been a few years, lol)  We did it at TCC because two of the profs were active in our club at the time and did it for us for free, but it could really be done anywhere.


Title: Re: Car scales and corner weight?
Post by: rvamaxima on April 01, 2016, 01:27:34 PM
I realize this thread is almost a year old, but I didn't want to start a duplicate posting regarding car scales.

Any chance of getting something set up at an autocross or test and tune for anyone that wants to know their weigh balance this season. I for one would be interested and if a modest fee was charged for time and "wear and tear" I don't think anyone would mind too much.


Title: Re: Car scales and corner weight?
Post by: gunny on April 01, 2016, 07:21:09 PM
Yea, I'd be in for that! I've never had my car on a scale.

Gunny


Title: Re: Car scales and corner weight?
Post by: Shane Irving on April 02, 2016, 01:11:46 AM
I'm interested as well in getting mine up on the scales as well. Maybe early before registration opens one autocross? (Hopefully May since I'll miss this month's event Nascar! Haha )


Title: Re: Car scales and corner weight?
Post by: jloehlein on April 02, 2016, 04:04:27 AM
I could bring the scales to the Practice Autocross in May.  It would give you total weight and rough balance.  Highly dependent on how flat and level an area there is to set them up.


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on April 02, 2016, 06:19:05 AM
Wow its been a year already, where'd the time go!? I'm still willing to build some ramps for this. Should be easy just stacked and staggered plywood about 20" long overall and as wide as the scale,  1/2" sheets staggered every 4" going up to the scale.

If we set up a station to pull cars up to, the rear scales and ramps can be slid out, pull car up to front scales and align them, slid in rear scales and ramps, weigh car, roll off, slide out rear scales, move car, rinse, repeat. Of course like you said, finding a flat level surface is the hard part.


Title: Re: Car scales and corner weight?
Post by: gunny on April 02, 2016, 07:46:08 AM
I was talking with Marc last year and what he did to get a level playing surface was to get some floor tiles and stack them till he had each corner level with each other. Floor tiles are about 1/8" thick so getting something pretty close to level wont be to difficult.

Gunny


Title: Re: Car scales and corner weight?
Post by: bernard on April 02, 2016, 08:34:34 AM
SCCA uses two 10" aluminum channels between the front and rear scales on each side. The channels slide inside each other and are marked so you can set the scales to match the wheelbase of the car. If when had 4 ramps and the channels you can run a lot of cars across the scales. Like Justin said we need to find level ground but it should be good enough to an idea of where you are at.


Title: Re: Car scales and corner weight?
Post by: rvamaxima on April 02, 2016, 09:55:45 AM
SCCA uses two 10" aluminum channels between the front and rear scales on each side. The channels slide inside each other and are marked so you can set the scales to match the wheelbase of the car. If when had 4 ramps and the channels you can run a lot of cars across the scales. Like Justin said we need to find level ground but it should be good enough to an idea of where you are at.

A laser level and a ruler and I think we got it all sorted out. I can get the floor tiles and give them who ever has the scales next autocross.


Title: Re: Car scales and corner weight?
Post by: jamescarriv on April 02, 2016, 12:22:00 PM
I would like to use this. Then I would need to figure out how to corner balance a stock car....


Let me know if I can help out

:)


Title: Re: Car scales and corner weight?
Post by: gunny on April 02, 2016, 01:33:32 PM
ok so it looks like we have a lot of interest and it looks like we have some nice folks willing to donate time and equipment. I'd like to do this! if everyone is good with this and the OD, board members are good we should do this at the May practice, I'd volunteer to be OD for may but I'm OD for the April race.

Gunny


Title: Re: Car scales and corner weight?
Post by: bernard on April 02, 2016, 06:14:11 PM
How tall are the scale pads? I think I could brake the aluminum channels out of a 4'x8' sheet of 1/8" aluminum at my work.


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on April 03, 2016, 05:10:22 AM
The scale pads are ~2 5/8" tall with a 15"x15" footprint.


Title: Re: Car scales and corner weight?
Post by: jloehlein on May 03, 2016, 07:18:39 PM
So, my plan is still to bring the scales out on Saturday, unless it's raining.  If it rains, I'll bring them Sunday if it is dry out then.


Title: Re: Car scales and corner weight?
Post by: bernard on May 04, 2016, 06:43:36 AM
Sorry, I made no progress on the ramp system.


Title: Re: Car scales and corner weight?
Post by: rvamaxima on May 09, 2016, 07:22:46 PM
Thanks for bringing out your scales Justin

1990 240sx coupe OEM curb weight on Edmonds is 2684, weighing currently at 2403 and dropping.
I'm curious to see how far I can get the curb weight down now.


Title: Re: Car scales and corner weight?
Post by: mikedamageinc on May 10, 2016, 04:32:26 AM
I was unable to make it down Saturday, any chance of another weigh in day?


Title: Re: Car scales and corner weight?
Post by: jloehlein on May 10, 2016, 11:15:31 AM
I'll try to find some time - the scales don't fit in my Miata, so it needs to be some time I'm driving someone else's car or towing my junk there.  I'd really like to have my Dad's Cobra running for the practice day in July, which might work out well for me to bring the scales.