Wow, that is crazy - I didn't know they were that far off.

 

Yeah that number is wrong for the 245 Toyo.

My car with 8500rpm redline tops out at 63-64mph I think, no desire to have it any higher.

 

I just looked on Toyo's web page - it looks like Tire Rack has some typos. According to Toyo:

245/35/17: 23.8"
245/40/17: 24.7"
255/40/17: 25.2"

That looks much more reasonable.

 

So to change the subject, does anyone know about how much spring travel you're getting with the typical setup of 700-900 lb springs and a big stiff sway up front and small/no rear sway? If so what springs and sways are you using and how much travel do you have?

Or anyone have a reasonable estimate of CG height so I can calculate it?

 

TireRack does not carry Toyos. I got the wrong value for the 245/35/17 from the Toyo page. I grabbed the line above. Thanks for catching that.

 

Not sure if you guys have seen this

https://www.s2ki.com/forums/index.php?showt...&#entry20077151

 

Except that his Motion Ratio's are wrong. And that he's ignored dynamic alignment changes, which will have more of an effect on the balance of the car than anything else. You can't look entirely at spring rates and roll bars and think that will determine the overall balance of the car. You also have to consider camber gain, toe change, caster change, ride height, and scrub radius. Spring rates and shock settings will just change the amount, and speed of alignment change.

But of course he is doing it for the street - so performance be damned I guess.


Other than that - all that information is all over the internet, nice summary if it isn't in a ludicrously hard format to read.

 

Interesting

 

I think his motion ratios are right. I was going to measure them myself to double check, but right now I'm working under the assumption that this thread is right - https://www.s2ki.com/forums/index.ph...c=380006&st=0& . That lists the same motion ratios as he had and is where he got them I'm assuming.

 

So... I got some RS3's, After about 1500 miles the tires were barely worn (could still see the flames)... then me and my wife went to a local Autox on a concrete lot... small even we got 15 runs in cumulatively (7 each, she got a rerun) afterwards however the fronts still have a TON of tread left but the rears are nearly to the wear bars... I cant figure out how I lost so much tire so quick. The only thing I can think of is my wife spun a lot (like only had 2 runs where she didnt) due to a combination of cold, and her not having even touched the car in about 4 months. she also got very sideways at times. But I cant imagine it wear through this much of the tires... the tire wear is perfectly even.

anyone else have this issue?