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Old 02-25-2013, 09:50 AM   #21
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Quote:
Originally Posted by Bevo View Post
Those pressure from Dunlop are for race tires.
Except for the part in the faq on that page that says
If you are riding on the race track, a good starting point is 32 front and 32 rear.

Those are for the Q2's
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Old 02-25-2013, 12:52 PM   #22
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I will certainly ask john at msrh. This kinda of stuff interest me i guess. Im more interested in why 4-6psi growth is ideal. What would be the goods and bads of slightly more or less growth? Im thinking psi directly relates to tire surface temps but are you trying to get the tire to run at an optimal temp or tryin to get an optimal contact patch or a combo of two.
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Old 02-25-2013, 12:57 PM   #23
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Quote:
Originally Posted by plummer View Post
I will certainly ask john at msrh. This kinda of stuff interest me i guess. Im more interested in why 4-6psi growth is ideal. What would be the goods and bads of slightly more or less growth? Im thinking psi directly relates to tire surface temps but are you trying to get the tire to run at an optimal temp or tryin to get an optimal contact patch or a combo of two.
IMO tire temp is probably more important than contact patch. I wonder how much contact patch you actually gain by dropping the PSI by 4-5 lbs cold.
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Old 02-25-2013, 05:16 PM   #24
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Quote:
Originally Posted by Bevo View Post
IMO tire temp is probably more important than contact patch. I wonder how much contact patch you actually gain by dropping the PSI by 4-5 lbs cold.
I bet there would be almost no benefit by doing this. It would likely deform the tire under heavy braking, and acceleration. That tire would overheat in no time. This is just my opinion, I dont claim to be an expert or even close. Talking to the tire reps would be your best option if you want good valid info. Even then unless they are out at the track on that given day they will only be able to give you a good base line of starting pressures. You would have to adjust accordingly.

@mr337.......oh ok I didnt know that. I knew that unless you keep those constantly going through water they would over heat and shred. I guess when the track is wet your not going to go out there and run your hardest on rains. Im guessing with all the sipes on those tires and the extremely soft compound that they would come up to temp really fast.
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Old 02-25-2013, 05:16 PM   #25
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Quote:
Originally Posted by Bevo View Post
IMO tire temp is probably more important than contact patch. I wonder how much contact patch you actually gain by dropping the PSI by 4-5 lbs cold.
good point. i doubt contact changes much.
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Old 02-25-2013, 05:29 PM   #26
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Quote:
Originally Posted by QUICKGIXX View Post
I bet there would be almost no benefit by doing this. It would likely deform the tire under heavy braking, and acceleration. That tire would overheat in no time. This is just my opinion, I dont claim to be an expert or even close. Talking to the tire reps would be your best option if you want good valid info. Even then unless they are out at the track on that given day they will only be able to give you a good base line of starting pressures. You would have to adjust accordingly.

@mr337.......oh ok I didnt know that. I knew that unless you keep those constantly going through water they would over heat and shred. I guess when the track is wet your not going to go out there and run your hardest on rains. Im guessing with all the sipes on those tires and the extremely soft compound that they would come up to temp really fast.
There is a benefit when you start dropping pressures but it depends on a couple other things. There has been plenty of times we have dropped my rear 2-3 pounds more then what we normally run and it works great.

As for the rains. You will be very surprised how hard you can ride/push in the rain. Especially on the rain tires. Just have to be smooth with your inputs and get most of your braking done while you are up and down. Don't trail in the corners how you do when it's dry. As for your comment on the Warmers. Don't do that like mr337 said you don't want that tire to heat up an start shredding.


Quote:
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good point. i doubt contact changes much.
Actually it does.
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Old 02-25-2013, 05:33 PM   #27
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[QUOTE=392;3499586]There is a benefit when you start dropping pressures but it depends on a couple other things. There has been plenty of times we have dropped my rear 2-3 pounds more then what we normally run and it works great.

As for the rains. You will be very surprised how hard you can ride/push in the rain. Especially on the rain tires. Just have to be smooth with your inputs and get most of your braking done while you are up and down. Don't trail in the corners how you do when it's dry. As for your comment on the Warmers. Don't do that like mr337 said you don't want that tire to heat up an start shredding.


I can see 2-3, but 4-5??? Im not trying to say your wrong....just curiious. Im still learning just like most people here.

Ya im well aware that they can push pretty hard when its wet, but I was just saying they arent gonna push just as hard as when its dry.....I dont think i would ever have the baaaawwwwllllls.......
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Old 02-25-2013, 05:35 PM   #28
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You'll get it ^^^

I'm gonna txt John and tell em to come in here and shed some light for you guys. Guy has a wealth of knowledge and IMO is the best one in the game when it comes to tires.
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Old 02-25-2013, 05:41 PM   #29
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Quote:
Originally Posted by 392 View Post
You'll get it ^^^

I'm gonna txt John and tell em to come in here and shed some light for you guys. Guy has a wealth of knowledge and IMO is the best one in the game when it comes to tires.
well that doesnt help...lol. I agree john is very good at what he does. Thats why I buy my tires from him

Any luck selling your r10's bro?
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Old 02-25-2013, 06:09 PM   #30
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Dunlop recommends 32 cold for the Track Pressure on the Q2's.
You can vary that a little depending on how fast you are and weather.
The faster you are the hotter your tires get.

Less psi = more carcass flex and hotter tire. But you don't want to much carcass flex because then the tire doesnt handle well.

Typically you should stay within 2 psi of your cold psi. Or within 2 psi of your hot off warmer psi. Or within 2 psi of your hot off track psi.

Dunlop Race Tire Base PSI is 23 rear 33 front for average conditions
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Old 02-25-2013, 06:38 PM   #31
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@ quickgixx,

Yea sold a couple sets but still have couple more new sets of r10's and pirellis.

Need a set?
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Old 02-25-2013, 07:34 PM   #32
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I would if you had a 12/180 set of r10s. Im paying john a visit thursday and snagging me a set of these ...lol
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Old 02-25-2013, 07:38 PM   #33
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I have the 180 as well SUCKA!
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Old 02-25-2013, 07:54 PM   #34
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bro why u holding ouy lmao
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Old 02-25-2013, 07:57 PM   #35
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