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Believe
 Originally Posted by CBR929RE
never heard them giving a temp, just the hot pressures. I'll tell ya 1.5-2lbs is a huge difference in them though. my last track day I didn't have enough time before I got there to get them on the warmers for awhile before the first session so I didn't bother. That first session they felt like absolute crap, took it easy cause it was also cold out and came in and checked. yup both tires off 1.5-2pounds. Added a little and threw the warmers on, checked just before going out next time and they were good again.
You do realize that adding air (or N2 or whatever) makes the tire run cooler right? If the tires weren't coming in, I would guess they were over inflated unless you were seeing cold shear. With O2, you want to see a 20% pressure growth between stone cold and 3 lap hot on most contemporary track tires.
Now in stereo 
Visionaries say "Yes, we can."
Engineers say "Not so fast."
and Seamus is awesome
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posing for the camera
Originally Posted by abtech
You do realize that adding air (or N2 or whatever) makes the tire run cooler right? If the tires weren't coming in, I would guess they were over inflated unless you were seeing cold shear. With O2, you want to see a 20% pressure growth between stone cold and 3 lap hot on most contemporary track tires.
I actually didn't even think of it like that. but adding air worked. Pirelli gives the hot pressure so once I added the air I threw the warmers on and checked again before going out. I forget if I got them spot on right away or if I had to make a minor adjustment but when I went out again they felt nice. Came back in and checked and were still right where they suggest they be.
"If everything seems under control, you're just not going fast enough" - Mario Andretti
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No Hammer this year :(
Originally Posted by CBR929RE
I actually didn't even think of it like that. but adding air worked. Pirelli gives the hot pressure so once I added the air I threw the warmers on and checked again before going out. I forget if I got them spot on right away or if I had to make a minor adjustment but when I went out again they felt nice. Came back in and checked and were still right where they suggest they be.
Think of it this way.. less air is a like a flat(flatter) tire. A flatter tire creates more friction. The extra friction causes heat. Extra heat causes expansion in the air, adding pressure. No one told me this... but I think I'm correct here, right?
Do sober what you said what you'd do drunk. That will teach you to keep your mouth shut. - Ernest Hemingway
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posing for the camera
Originally Posted by 08silvercbr
Think of it this way.. less air is a like a flat(flatter) tire. A flatter tire creates more friction. The extra friction causes heat. Extra heat causes expansion in the air, adding pressure. No one told me this... but I think I'm correct here, right?
yes I believe you are correct. I was just saying I didn't think of it at the time when I was at the track. At the time I figured that when I got off the track there wasn't enough pressure, therefore I thought not enough air in there. adding a little worked. its weird cause I remember them being around 23-24psi and 28psi before I hit the track, right when I got off they were only around 27-30 I think it was. should be at 28/32 hot.
"If everything seems under control, you're just not going fast enough" - Mario Andretti
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"Able was I ere I saw Elba..."
Originally Posted by 08silvercbr
Sent from PC using "smackatalk"
"Ten times more charming than that Arnold on Green Acres..."
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Blending
Originally Posted by CBR929RE
yes I believe you are correct. I was just saying I didn't think of it at the time when I was at the track. At the time I figured that when I got off the track there wasn't enough pressure, therefore I thought not enough air in there. adding a little worked. its weird cause I remember them being around 23-24psi and 28psi before I hit the track, right when I got off they were only around 27-30 I think it was. should be at 28/32 hot.
To low a pressure might have been tire flex that you were feeling, not getting up to temperature is due to a fly riding hippie slow....
If everything tastes like chicken..... what does chicken taste like 
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It's Who You Know That Counts
Originally Posted by 08silvercbr
Think of it this way.. less air is a like a flat(flatter) tire. A flatter tire creates more friction. The extra friction causes heat. Extra heat causes expansion in the air, adding pressure. No one told me this... but I think I'm correct here, right?
No.
"It's not debt per se that overwhelms an individual, corporation, or country. Rather, it is the continuous increase in debt in relation to income that causes trouble." --Warren Buffett
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posing for the camera
Originally Posted by SheepOfBlue
To low a pressure might have been tire flex that you were feeling, not getting up to temperature is due to a fly riding hippie slow....
well I don't know what it was exactly but it felt like the bike wanted to just come right out from under me every time I tipped it into a corner. got the pressure right and it was good. and I was riding probably midpack in the advanced group that day  and I'm UP to 124lbs according to my trip the doctor a couple weeks ago
"If everything seems under control, you're just not going fast enough" - Mario Andretti
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Do too.
Originally Posted by 08silvercbr
Think of it this way.. less air is a like a flat(flatter) tire. A flatter tire creates more friction. The extra friction causes heat. Extra heat causes expansion in the air, adding pressure. No one told me this... but I think I'm correct here, right?
I believe it's the flexing of the tire carcass that creates the heat.
Ducit Amor Patriae
Richard Herald, The Gentle Giant
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
---Leonardo Da Vinci
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It's Who You Know That Counts
Gold star for the big man.
"It's not debt per se that overwhelms an individual, corporation, or country. Rather, it is the continuous increase in debt in relation to income that causes trouble." --Warren Buffett
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DIRTDOG
Just a little info my dad used to help a guy that raced sprint cars (SOD champ a few times) they used to use N2 in the tires to help keep them at a constant pressure. But now most teams use normal air and a special valve stem that bleeds off the extra pressure as the tire heats up. You just set it for the presure you want and it bleeds off the extra. The only problem with the new system is you need to put some air in after each run or they are soft until they heat up. Some guys don't do this but the start of the race is very important(easier to pass people that are bunched up) so it was worth the time. Also the damage you can do to the soft tire in the first few laps can be enough to cost you the race at the end.
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No Hammer this year :(
Why did they quit using N2?
Do sober what you said what you'd do drunk. That will teach you to keep your mouth shut. - Ernest Hemingway
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Believe
Now in stereo
Visionaries say "Yes, we can."
Engineers say "Not so fast."
and Seamus is awesome
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DIRTDOG
Why did they quit using N2?
Some did some did not. Like he said its a pita to bring along a bottle of N2 just to fill the tires plus they still grow a bit because you can't get all N2.
Lots of team have the N2 bottles to run air tools and they still use the N2 with the new valve stems. Well old valve stems with center mounted bleed system makes it near fool proof.
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Jumping in b/c I have N2 in my VF700 tires. A local place filled them up for free about 2-1/2 yrs ago, just before the old girl quit running. So, I don't know about street/track, heating/cooling, stability, etc. results ... but ... the bike has now sat unused for 2-1/2 yrs and the tire pressures have only dropped a few lbs., and there's no evidence of sidewall crackling :^). N2 maybe good for storing tires ??
Guns don't kill people, drivers with Cellphones do; unknown
1st - '67 650 BSA T-bolt
2nd - '75 850 Norton Istate
3rd - '76 750 Benelli 6
4th - '76 850 Moto Guzzi T3
5th - '84 VF700F, NR
6th - '07 VFR, all-round
7th - '02 Aprilia RSV1000, hooligan
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granted the gas wont expand much if any, but wouldnt the rubber/tire expand from the heat? in turn lowering the pressure? since with the tire expanding there'd be more volume of space to fill? i have no clue what i just said hahahahahha...  
"CHICKENSTRIPS ARE FOR CRUISERS AND STRAIGHTLINERS"
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I think Michael Jackson's sleep chamber could be rigged to facilitate this...
Originally Posted by seamus
Or you could install a second valve stem...
Or you could change your tires in a nitrogen filled chamber...
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Do too.
Originally Posted by BW_Fuel_Company
I think Michael Jackson's sleep chamber could be rigged to facilitate this...
He's not using it anymore.
Too soon?
Ducit Amor Patriae
Richard Herald, The Gentle Giant
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
---Leonardo Da Vinci
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Believe
Originally Posted by seamus
He's not using it anymore.
Too soon?
Actually he is. They just moved it to his present location . . .
Now in stereo
Visionaries say "Yes, we can."
Engineers say "Not so fast."
and Seamus is awesome
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Blending
If everything tastes like chicken..... what does chicken taste like
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Do too.
Originally Posted by SheepOfBlue
Arrgon
Is it Talk Like A Pirate Day already?
Ducit Amor Patriae
Richard Herald, The Gentle Giant
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
---Leonardo Da Vinci
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"Able was I ere I saw Elba..."
Originally Posted by SheepOfBlue
Arrgon
Surveys show 4 out of 5 Pirates prefer this over Nitrogen...
"Ten times more charming than that Arnold on Green Acres..."
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111
  This place cracks me up...
"If you're going to be on top, you better be prepared for the inevitable criticism.
Goes for everything from sports to politics to sex."
Seamus.
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