Pressures | GTAMotorcycle.com

Pressures

Corsara

Corsara

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Last season on street tires (Dunlops Q2), I ran 31 front / 27 rear pressures (on cold tire), and it worked really well for me. This year I'm starting off on Bridgestone racing slicks with Bickle warmers, and I have no idea what pressures to run. I've already read the Bickle thread, let's assume I get them to 80 C, then what pressures (on hot tire) should I run? Also, where do I measure the temperature (with IR gun)---on the tire or on the rim?
 
http://www.trackaddix.com/bridgestone.asp
If you're on the warmers and they have had sufficient time to heat up then you should set the pressure pretty close to the hot temp pressure they recommend for your tires. It's good to keep checking them throughout your day just to be sure. I'm gonna say check your tire temp on the tire.
 
RobVN said:
http://www.trackaddix.com/bridgestone.asp
If you're on the warmers and they have had sufficient time to heat up then you should set the pressure pretty close to the hot temp pressure they recommend for your tires. It's good to keep checking them throughout your day just to be sure. I'm gonna say check your tire temp on the tire.
Click to expand...

Thanks Rob, found this in the link you posted:

Superbike Slicks
(+/- 2 lbs.)
Cold ----------- Off Warmers -------- Hot Off Track
27F / 24R ------ 29F / 26R ---------- 31F / 28R
Other than not getting what the (+/- 2lbs) means (it's not a unit for pressure), I'll go with these values.
 
Corsara said:
Thanks Rob, found this in the link you posted:

Superbike Slicks
(+/- 2 lbs.)
Cold ----------- Off Warmers -------- Hot Off Track
27F / 24R ------ 29F / 26R ---------- 31F / 28R
Other than not getting what the (+/- 2lbs) means (it's not a unit for pressure), I'll go with these values.
Click to expand...
At all race days and most track days (I think) there are tire representatives that can tell you for that day what temperature you should run, ask them
 
Corsara said:
(+/- 2 lbs.)

Other than not getting what the (+/- 2lbs) means (it's not a unit for pressure)
Click to expand...
lbs = pounds = PSI ;)

-Jamie M.
 
Follow the recommendations of the Bridgestone rep Dave.

Forget about the IR gun, it really doesn't give much valuable info, i know I have tried it several times. the readings are very inconsistent. You would need the type that penetrates the tire. Besides it's just something extra that a newbie doesn't need to think about it when there are so many other more important factors.
 
sounds about right, every manu is bit different, dunlop KR448/449's are 33/21 psi cold, while the pirelli superbike pro's run 31-35 (IIRC)/24-29 cold. So there is quite a range. Go with what the rep recommended
 
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Thanks guys. But since I doubt there will be a Bridgestone rep at TMP trackdays, is it correct to assume that if the ambient temperature is colder, I should go with the lower pressures in the range in order to let tires generate more heat?

For example, off the warmers, Bridgestone values say 29f/26r at 80F (26C) ambient, so if it's 15C, I should go with the -2lbs: 27f/24r ?
 
Corsara said:
Thanks guys. But since I doubt there will be a Bridgestone rep at TMP trackdays, is it correct to assume that if the ambient temperature is colder, I should go with the lower pressures in the range in order to let tires generate more heat?

For example, off the warmers, Bridgestone values say 29f/26r at 80F (26C) ambient, so if it's 15C, I should go with the -2lbs: 27f/24r ?
Click to expand...

Are you going on Thur??
If so than I will be there and I can help you with pressures. I will be doing testing for suspension and pressures my self that day
 
Taking a temperature reading from the rim gives you a good indication of how much the heat has soaked through the tire instead of just the outside surface. If your rims aren't warm, your tires aren't ready.
 
Snipes20 said:
^^Look for the Red #1 Names Phil
Click to expand...

Will see you there, Phil! I'm Orlin.

dricked said:
Taking a temperature reading from the rim gives you a good indication of how much the heat has soaked through the tire instead of just the outside surface. If your rims aren't warm, your tires aren't ready.
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Do you know by any chance how warm is warm (on the rim)? Like 80C with temp gun warm, or warm to the touch, or burning to the touch? I want to be perfect, so when I crash I don't blame the tires ;)
 
It's pretty darn warm, 45min to an hour with your warmers on is usually a good rule of thumb depending on how cold the tires are to begin with. If its a fairly cool day let them sit for 1hr, and keep the wind from blowing through the rim.
 
dricked said:
It's pretty darn warm, 45min to an hour with your warmers on is usually a good rule of thumb depending on how cold the tires are to begin with. If its a fairly cool day let them sit for 1hr, and keep the wind from blowing through the rim.
Click to expand...

My Bickle warmers just cover the tires, not the rims or between them (maybe an older model?!). Any suggestion for keeping the wind away? Also, I assume the warmers won't heat the tires up too much to burn them, right? E.g., If I hypothetically leave them on for 2 hours, is that going to ruin the tires/warmers? Generally, my plan was to put the warmers on after tech inspection, leave them on for 45-1h, do a session, then put the warmers (turned off) for 20 mins, then turn them on for 20 mins, then session, and cycle begins again.
 
Corsara said:
My Bickle warmers just cover the tires, not the rims or between them (maybe an older model?!). Any suggestion for keeping the wind away? Also, I assume the warmers won't heat the tires up too much to burn them, right? E.g., If I hypothetically leave them on for 2 hours, is that going to ruin the tires/warmers? Generally, my plan was to put the warmers on after tech inspection, leave them on for 45-1h, do a session, then put the warmers (turned off) for 20 mins, then turn them on for 20 mins, then session, and cycle begins again.
Click to expand...

bickle sells tire sox for windy days. I've used coats, sweaters, blankets etc draped over the wheels.


put the warmers back on the tires right after your session turned on until your next session. the only time i put the warmers on my tires turned off is at the end of thru day to let them cool slightly slower.

leaving warmers on the tires for two hours, esp on a cool day isn't going to hurt anything.
 
Corsara said:
My Bickle warmers just cover the tires, not the rims or between them (maybe an older model?!). Any suggestion for keeping the wind away? Also, I assume the warmers won't heat the tires up too much to burn them, right? E.g., If I hypothetically leave them on for 2 hours, is that going to ruin the tires/warmers? Generally, my plan was to put the warmers on after tech inspection, leave them on for 45-1h, do a session, then put the warmers (turned off) for 20 mins, then turn them on for 20 mins, then session, and cycle begins again.
Click to expand...
Mine come with these
2012-09-14_14-48-50_108.jpg
 
Bickle doesn't have the tire socks on his website for individual sale... I guess I'll be using some of my personal clothing, hope they allow nude people in the pit areas, hahaha

EDIT: correction, found them on the Bickle site! No nudity.
 
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