Corner Scales

[redmt]

I'm thinking about buying a set of corner scales. http://www.summitracing.com/parts/pro-67650 Anybody have any experience with these?

[bobcowan]

Proform is cheap chinese copies of quality American products. I wouldn't buy anything with the Proform name on it. It's cheap for a reason.

[redmt]

I just called them. They are made in Taiwan and carry a 30 day warranty. I'll keep looking.

[bobcowan]

Last I heard, Spruce Aircraft still sells Ruggles Scales. They advertise them in a group of three. But if you call them they'll send them out in a group of 4.

[RedEye]

Make friends with your local airport guys, they will likely rent or let you borrow a set for free.
Most pilots are really cool and love cobras.

[mdross1]

After having our car done and being totally amazed at the difference also considering road racing looked for scales and found them.After a lot of consideration and the times they would get used chose to not buy them.Needed stickier tires the BFG's look nice but have caught me off guard one too many times.

[Bobcat]

FYI .. just got off the phone with Spruce Aircraft Supply and am getting a quote on some scales from them . Their scale guy recommended one scale , with the car leveled while on the scale . Sounds complicated and a pita , but one scale will be about $500 to $600 . Hope he sends specs and more details .

[redmt]

Originally Posted by Bobcat

FYI .. just got off the phone with Spruce Aircraft Supply and am getting a quote on some scales from them . Their scale guy recommended one scale , with the car leveled while on the scale . Sounds complicated and a pita , but one scale will be about $500 to $600 . Hope he sends specs and more details .

I'll give them a call. I couldn't find them on their web site. You don't happen to have a direct link ??

John

[Bobcat]

John ....
You won`t find the scales on their site . They want you to call their scale guy and discuss what you want . Their number is 1 - 800-526-0070 .
Just got the quote and a picture of the scale . $600 ....I`ll try to post the picture this weekend .
Didn`t realize it , but knowing weight and it`s location on a plane is pretty important ..... makes sense , I had just never thought about it .

Bob

[redmt]

Originally Posted by Bobcat

John ....
You won`t find the scales on their site . They want you to call their scale guy and discuss what you want . Their number is 1 - 800-526-0070 .
Just got the quote and a picture of the scale . $600 ....I`ll try to post the picture this weekend .
Didn`t realize it , but knowing weight and it`s location on a plane is pretty important ..... makes sense , I had just never thought about it .

Bob

Thanks for the phone # I'll give them a call next week. It would seem logical that you could weigh one corner at a time if you kept the pad heights the same. I could see where doing it on a lift would have it's advantages. It wouldn't be too much different than dropping a car onto skates and moving it.

[FatBoy]

Originally Posted by Bobcat

FYI .. just got off the phone with Spruce Aircraft Supply and am getting a quote on some scales from them . Their scale guy recommended one scale , with the car leveled while on the scale . Sounds complicated and a pita , but one scale will be about $500 to $600 . Hope he sends specs and more details .

I really doubt that you could do an effective job with only one scale. Your figures will be constantly moving every time you lift a different wheel onto the scale. I went to a local race setup specialist and with my weight in the driver's seat and a half tank of fuel, we were able to get within 1lb cross weight. The difference in car behaviour is remarkable.

Paul

[mdross1]

Originally Posted by FatBoy

I really doubt that you could do an effective job with only one scale. Your figures will be constantly moving every time you lift a different wheel onto the scale. I went to a local race setup specialist and with my weight in the driver's seat and a half tank of fuel, we were able to get within 1lb cross weight. The difference in car behaviour is remarkable.

Paul

Agree,the racer that set our car up did the same thing with me in the seat do not remember how much fuel.All four tires had a scale.

[Bobcat]

Guys ... I was just looking at another , possibly more economical avenue .There is no way it would be cost effective , or accurate , to use one scale at $600 , especially since you can get a new set from Longacre for under $1000 that does all calculations for you and measures all 4 wheels at one time , not to mention the problems that Paul brought up .
My car was set up by a professional SVRA/HSR/ ex IMSA shop on their scales and I only have limited access to them , hence my search .
However , it should also be noted that all anti sway bars must be disconnected before setting wheel weights to avoid any preload and then reconnected with zero preload .
Yes , having your cross weights as equal as you can get them is important , but it is also important to make sure the left side tires have the same front to rear weight distribution as the whole car .... as should the right side tires ....i.e. , the front to rear ratios that need to be identical . For example , if the front has 50% of the total weight , the LF tire should see 50% of the left side weight etc .
There is a theoretical ideal weight distribution for each wheel/tire that can be calculated knowing your front and rear weight percentages and then set by the scales . I went back and looked at my wheel weights and percentages and that is exactly what the shop had done for me .

[redmt]

Where are you looking at the Longacre scales? For a few bucks more they may be a better choice. The others only have a 30 day warranty. Not good enough for that sized an investment.

Found them. Now just need to sort through all the different models.