Need Help on Breaking in Track/Slick Tires

Joined
5 June 2002
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307
Location
San Diego, Ca
I just got a set of new Dunlap slicks on used stock 16/17 rims. I only got them because they were $1k for everything. I'm going to a track event (my second one) and am not sure on how to proceed on the proper wear-in process. I just read the FAQ section on performance/track tires, but would like some of your thoughts on this.

Thanks in advance your your help.
 
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If they are NOT heat cycled from the retailer, you can do it your self. The best way would be to find a curvy road or some looped on/off ramps from a highway. Try to find equal amounts of left loops and right loops. (I have 2 awesome ones right by my house 10 mile apart) I would drive them for about 15-20 minutes, and then park your car and let them cool for a day. You could repeat this again a day or so later.

When low treadwear rubber is heated up a bit and then cooled before the first track use, the molecules become tighter, thus longer wear life.

I believe the Tire Rack has some instructions on how to heat cycle your self on their website. Other wise take them to a big tire shop in your area and see if they have the heat cycle machine.

Then go to the track and have fun. Remember these tires will be like driving on ice for the first couple laps!!!! Take it easy until heat is built up in them. Then you will stick like glue compared to the street tires that you are used to.

This is from Tire Rack;

New competition tires will be slippery for their first laps, and will begin to feel better as they get scuffed in and build up heat. We recommend that drivers heat cycle their tires before using them in competition. Heat cycling helps you get the most consistent performance and tread life out of your tires. It is the process of gently bringing the tires up to temperature for a short duration and letting them cool. Ideally, you should break in your tires, remove them from your vehicle and set them aside for more than 24 hours before your track sessions and races. Often this requires running a practice session on new tires to prepare them for a future race, while you use tires prepared previously for the current race. The Tire Rack offers an automated heat cycling service that can complete this process before your tires are delivered to you.
 
T Bell: You really advise to heat cycle race slicks on public roads?? I wouldn't do that - at least because of legal and insurance problems when something happens (police control, accident caused by another driver etc.)

I would do such things strictly on the race track - maybe with two sets of rims.
 
I was assuming that they were DOT R-compounds which are street legal. If they are true slicks, I would be surprised, he has only done 1 school.

I agree that scrubbing them in on a track is the best, but school goers do not have easy acces to tracks just for scrubbing tires in.
 
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They are true slicks, as I was looking at these as well, but just did not have the dime to drop on them (da*#it!!) They are Dunlop competition true flat faced no groove racing slicks. Great purchase emvanderpol, but I would not use them unless you have already run on DOT-R compounds before. Huge difference in handling from street tires, even from "typical" R compounds.


The only problem I foresee with street cycling slicks is they hate rough pavement, and you take a chance of ruining a tire. Best bet is to take them on a parade lap or just run 3-4 laps during a school at 70%, then pulling them off the car and back into the trailer for a later date (at least 24hrs, 48hrs+ is better).
 
emvanderpol:
Do yourself a favor. Can the slicks.
You have only one track day under your belt, you have sooooo much to learn about high performance driving and slicks will only retard the learning cycle.
Get an instructor, spend the day with him or her. Get many more track days under your belt, then go to track rubber. Too soon for slicks, way too soon. Please don't take offense.
 
Thanks for all the replies. They are Dunlap SP Sport "For Racing Only." I agree my experience is lacking, but it was a great deal (the rims alone are worth it). I just figure I'd try them out, even if it is just at the stadium parking lot. I'll bring em to the track and see what the instructors say. I believe "Gingerman" will be there at Buttonwillow Feb 8th.
 
emvanderpol said:
I'll bring em to the track and see what the instructors say.
I know what I would say: “please give me a different student!” I race on DOT R Hoosiers, but have seen many racers spin after just making the switch from DOT R tires to race slicks (I have one good spin on video right in front of me). These racers have a lot of experience and serve as instructors. I can not imagine a second time student going from street tires to slicks. I’m with Peter, no disrespect, but leave the slicks in the garage for a while.

Bob
 
Here is the (thus far unstated) reason why many track-experienced folks (I assume including those above) recommend against novice students using even R compound tires, let alone full slicks like you have.

When street tires are at the limits of their adhesion and start to lose grip, they give advance warning - audibly (squeal) as well as in handling feel (loss of feel). This gives you the ability to know when to back off and how far to push them.

R compound tires - and, even more so, full slicks - give little or no warning before losing traction. By the time you realize that you are losing grip, you have no grip and you may very well lose all control of your car.

I recommend waiting until you have at least a dozen track events under your belt before using R compound tires or slicks.
 
Wait a minute! I just don't quite understand. I've played Gran-Tourismo, I even have my full Gran Tourismo racing license. I have one FULL DAY of generic track experience.... I should be ready for GP racing....right???;)

Thanks again for all knowledge. I'll have to let them be for a while.
 
I think GT is biased against the NSX!!!! I can drive almost every car on that game faster than the NSX. They made the car real tail happy in the game, and make it plow like a snowplow around corners!!! My CTR kicks butt though!

I am glad that you agree to get a few more schools under your belt before upgrading tires. They really do act diff than high perf. street tires.
 
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