Z06Fix

How do they do guys? I will be running mine at Road Atlanta in Aug. I've been running them for autox thus far this season. They seem to be "ok" once they get some heat in them. Untill the do though wow... they are like ice almost. I figure I shouldn't have any trouble getting heat in them on track. Do they get greasy during say a 20min session?

I'm used to running track events on V710's. Now that was in my 03 Cobra so this is going to be a whole new experience. I can't wait to get the Z on track

I will be installing the DRM ducts with LG spindle ducts, along with Carbotech 10/8 combo pads. So the brakes should be in good shape. (already running stoptech SS lines and Motul RBF600 fluid)

Just a little worried about how the tires will hold up.

Thanks,

Eric

ryan0

They are the best street tire in the performance vs cost category.

They are NOT a DOT-R tire like the 710. They are a full tread, 200 treadwear street tire.

c4cruiser

The MX's on my 87 (275/40-17's) take a couple laps to get hot to where they stick but once that happens, they are very predictable. They don't squeal once hot but you can feel the point when they are going to let go.

My tires are 5 years old and although there is still 40-50% tread left, I think that the compounds that help to make them stick are about gone. At my last track day, they heated up with no problems, but after 5-6 laps (Portland) they did start to feel a little more greasy than prior events.

Watch tire pressures as they will build up around 6-8psi after a session. I start at 32psi cold all around .

MungoZ06

Post # 16 here ... lot's of track time on the MX's ...
http://forums.corvetteforum.com/show...ht=kumho+ecsta

Hardcorvette

The MX's are very predictable out on the track, they will gradually slide out vs. breaking loose. The only drawback is they will get "greasy" once you get a certain amount of heat in them.

Z06Fix

Thanks for the input guys.

johninar

I ran MXs for three years in autox and HPDE. Like was said above. Lots of input from the tires. No surprises, lots of feedback. I could put the car in a 4 wheel drift with confidence. They will get greasy with your setup and 20 min. track sessions. You've got more brake than tire, so expect to give up a bit there.

I think it's a great dual purpose tire for the money.

SHOCheapRacing

I ran these tires at Watkins Glen with two 70 degree days. I was very happy with the grip and predictability. I have run VictoRacers and Avon Tech R's on another car. The MX's came on a set of rims I picked up and figured they would be a great learning tire with the first time at the track with the Z. I have over 50 track days total with the other car.

I was also running the Carbotech 10/8 setup.

I will be running them again in 7 weeks at the Glen and then the new NJ track in August. They seem to be wearing well and I have left them on for street driving.

If I was not heading toward race tires I would get another set of MXs

Tom

Z06Fix

Great feedback.

Thanks guys.

StArrow68

The only difference I've noticed from above is about squeal. I can get
them to sing a lot if I enter smooth and hold them at the edge, if they
squeal it is usually from a sharp steering input which I try to avoid.
They can be noisy but I find that part of the feedback. I'm on PFC-x
pads so no where near the braking available on your pad but good
match for a street tire. I think the lesser available braking lets them
last longer, if not as fast on lap times.
Randy

mathia

My experiences agree with the feed back above. Driving style will play a big part in how much heat you put in them and therefore how well they will hold up in a 20 minute session before they start to get greasy.

I've gone through two sets of Kumho MXs, 1 in the stock C5 sizes and 1 in the stock C5 Z06 sizes. I found that as I got more experienced on the track, I got smoother and slid the car less, so they would actually hold up better even though I was going faster.

With both sets I noticed the heat cycling really hardens the rubber. I ditched each set after about 5 or 6 days of HPDE and a some thing like 10,000 miles on the street cause they'd lost so much grip. They still had a good amount of tread left, but they we noticeably harder to the touch at room temp and would not stick at all on the street.