Hoosier R60 Spring Rates

[AJWALKER]

I'm preparing to due some number crunching to optimize my Z16 suspension setup. In a effort to reduce fixturing building I would like to see if anyone out there has the spring rates at operating pressures for the Hoosier R60's.

Thanks in advance
AJWalker

[Roux]

Alan,

at what rotational speed were you hoping to get the data? And at what pressure?

I asked some hotshots about this a few years ago thinkng that a MATLAB model with all the springs damping and masses would be the hot ticket to setting up springs and shocks. Then you start asking all the questions about what to put in the model and your life turns out to be too short. Junk in Junk out is the big concern. Measuring the tire spring rate on your cold floor will ignore at temeprature and pressure behavior of a rotating tire

[TimW]

yes, you need to get the data from a tire dynamometer. If you ask Goodyear, they will provide that data about their tires, even our little FF tires. If you've never seen a tire dynamomenter, its a pretty impressive device, especially one capable of supporting loads from a Indy or F1 rear tire.

[Stan Clayton]

In a effort to reduce fixturing building I would like to see if anyone out there has the spring rates at operating pressures for the Hoosier R60's.

About 1200 lbs/in at 20 psi. Rate change per psi is about 35 lbs/in.

Have fun!

Stan

[stephen wilson]

There was a thread earlier this year with tire data from a formula SAE testing program, but I can't seem to find it. I do think the paper was fairly expensive to purchase. It was testing on a rolling "road" at various cambers/pressures/slip angles. Does anyone remember where that thread is?
Steve

[Brian]

http://fsae.com/eve

and search in the open FSAE discussion forum. they had the test done, they can probably hook you up with the results.

I've heard that AVON has similar data available.

Brian

[stephen wilson]

Thanks Brian. From a quick search it doesn't look like they tested the hard compound R60/R600 tires I'd be interested in. I'll search a little further when I have time.