geterdone

How long of a burnout is needed to heat these tires on unprepared concrete on a night with temps in the 50 to 60's. As off now I am having a terrible time trying to hook up when these tires seem to be unassumingly cold even after a 3-5 second burnout.

LoganExplosion

at least 7 minutes

Kenny94945

Seems a Tire Pyrometer tool would answer your question.

Too many variables...including the road surface condition, even if the tires are at proper operating temp.

Or go with 7 minutes as that seem reasonable...haha.

jaden61

I lake that answer, but can you calculate that in feet for me please?

Kaged

Sport Cup2 tires take a long time to warm up at those ambient temperatures. As in 2 laps on a track like Laguna Seca.
I switched from the Cup2 to the MPSS for AUtoX for that reason. And those tire still typically take a 2 - 3 runs to get to max grip.
So either switch tires or keep upping the burnout time. I assume you are checking the tire temperature with a pyrometer.

geterdone

LOL Correct

Bill Dearborn

Even then two laps only gets them up to about 200 degrees which is their approximate operating temp for max grip. A burn out on a drag strip can easily heat the tread above that point causing the tire to lose grip. You don't see cars running on a road course with their tires smoking so if you are getting smoke off Cup2 tires on a burn out you are probably overheating them.

Bill

geterdone

Since I'm not getting an answer on the street, how about at the track? How long?

Bill Dearborn

They aren't drag racing tires so you don't want to heat them over 200 degrees. Like most road racing tires their max grip will be in the 160-200 degree range. Here is what Michelin says about operating temperature:

Temperature Targets for Track Use
Porsche National Tech Tactics East 2016 – Tire Technology
160 - grip starts to come in
180 - optimal temp for max grip
200 - grip begins to fall off
use a probe thermocouple – non-contact will read inaccurately

I picked this info up at the following site:
http://pcachs.org/pca-wordpress/wp-c...erMichelin.pdf I think it is on Page 34 out of 65.

How long does it take to get the tires to 180 degrees by doing a burn out? Only doing some tests with a pyrometer will tell. Might want to take them to 190 and by the time you launch they may have cooled down to 180. If you do a smoky burn out like drag racers do at the strip when using tires designed for drag racing you will over heat them.

Bill

geterdone

Any recommendations on a probe thermocouple,

454z06

.........

RichieRichZ06

Those tires are not meant for drag strip or street launches so you will always be disappointed if you're expecting them to launch well. Stiff sidewall run flat tires, concrete and cool ambient temps are 0 for 3 for expecting a road course tire to launch.

Pacembellum

Zero, Trebec. the burnout on time on cup 2 should be zero because you shouldn't use them for that.

Thomasmoto

If you are really concerned about getting a decent launch you really need to switch to drag radials. Don't mean to be a smart -ss, but those tires aren't mean for drag racing.