Ordered a set of Hankook RS2 Z212 yesterday for MY02.

Hopefuly they will pay for them selfs this weekend.

What Cold Air Pressure should I run for autocross type racing, I will be running on cold tires and need a great launch and corner speed. ?

My top speed at this race will be around 90+ mph at the end of the run and 70 in the corners.

Thanks: Fred

 

90 mph autocross!?!?! Where the hell do you race? I gotta get over there.

I just ordered a set last week... having them installed on Friday.

I'll probably start out with 36-psi, chalk them, and tune from there.

 

[QUOTE=Racing_Chris,Jun 28 2006, 03:53 PM] 90 mph autocross!?!?!

 

They are far from overkill. I use that much traction on the streets every day. That much traction is not just for cornering. These tires are outstanding in the rain and allow much better stopping distances than plain "high performance" all season tires. Shorter braking distances and better traction come in handy in rush hour traffic on the way to and from work every day. All of my daily drivers have been on Azenis in the warmer months and snow tires during the winter for the last 2 years. I demand the best tire for the occasion. Its all about being safe.

If you want to drive around on some hard as a rock all season tire, thats fine. Just remember that the stock Bridgestones that come on the S2000 have a treadwear rating of 140. I have not had the stock tires last near as long as any of my Azenis and my Azenis are FAR BETTER in the rain.

Now, stick to what you know. Don't try to talk someone out of getting a BETTER TIRE for their car.

 

Fred,

When I autocrossed my S2000 on the Azenis, I ran about 32psi f/r. The Kooks have a softer sidewall than the Azenis so you may want to try a few extra lbs of pressure. Just keep in mind that you are asking this tire to do two different things that require different tire pressures. You will need a lower pressure to launch and a higher pressure for cornering so you will need to find that happy spot. Also, you may want to get an alignment. Max out your front camber. Also, try about -2.0deg of rear camber if you can get that much. The camber may hurt you a bit on braking and launching but I don't think you can get enough camber on a stock suspension to affect it that bad.

Your brand new Kooks will also have quite a bit of tread squirm. You may want to scrub them in VERY WELL before you compete. You will need to get the mold compound off and also try to take some of the rubber off the tread blocks. The kooks are a bit mushy when new, much more than the Azenis.

Good luck.

 

Thanks for the info

Don't like the idea of a softer sidewall, but only the HanKook RS2's come in size 245/45/16

Last time I droped my air pressure down to 30psi and had great launches but felt too soft in the corners on my SO2s. Running on cold tires didn't help also.

My New Tires are getting installed today and I Hope a couple hundred hard miles will scrub in the new tires.

Since the last race I have added a TP and I might add some spring spacers (Rubber wedge) to the Front Right and Rear Left springs to help me stay planted while turning Left.

Of the 16 cars total in our race, most are Built V8 Monsters, except one Crazy Fellow with a Little Four Banger and a big .

 

Stick to what I know? How about you learn how to read.

I'm not trying to talk him out of getting them. I encourage people to get what they need and will use. I don't care how you think you use the tires, but there is no way anyone can benefit more from these than any other high performance tire on the street. You never get to the point of needing that much traction... and if you do, you must be driving like a maniac. Acceleration demands: you could make a case for, but for braking and cornering, you don't even come close.

But whatever... I have no problem telling people that a tire is overkill or underkill for what they will be using them for. It's just my opinion. Tires are like shoes... one kind doesn't fit all situations. If you only play basketball for fun once a weekend, you don't need $400 Nikes that are good for only 2 games.

Not everyone NEEDS the best tire for their car. We'd all be rolling on R-compounds if that was the case. The RS-2's and Azenis are meant to be the dominant tire in Street Tire autocrossing classes. If you don't autorcross or otherwise race, you probably don't NEED this tire. Get a high performance tire that will last longer, and you'll never tell the difference on the street.

 

[QUOTE=Racing_Chris,Jun 29 2006, 12:02 PM]
Not everyone NEEDS the best tire for their car.

 

My Hankook's were installed yesterday, but they ordered the Wrong size for the front of MY02.

225/50/16 front 245/45/16 rear

Discount tire said to go ahead and run the 225's till my 205/55/16 size comes in next week.

Started at 35psi all around and felt that pressure was way to low. Felt like I was driving on Ballons compared to my old SO2's. Bumped the pressure upto 37psi and they felt a little better. At 125+ my SO2's stick and hold the road like glue, the Hankooks did not. The new tires only have 250 Hard miles on them so far and shoud get better once they are worn a little more, I Hope.

Pretty good tire running cold or warm, but when they get Hot they do tend to Squirm a little more. Hope this set (225 fr/245rr) works out for this weekends circle drag racing.

Will the Larger tires on the front tend to make the S a little more Tail Happy ?

 

Fred, you may want to stick with the 225 front tires. The car may be a little loose but with the 225, you can run a much bigger front sway bar. This will give you a big advantage on the autocross course. The bigger sway bar will also tame some of the looseness. Yea, it is more money spent but it is also better performance.

Those tires will be a little squishy for a while until you wear them down a bit. The tread blocks are not that big so they will squirm a bit. Also, the first 200 miles or so just get the mold compound worn off(unless you REALLY run the hell out of them right away). Be careful with the higher pressures. They are fine for the autocross but remember to lower them for street driving.