Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
SDTW Custom Wheels & Tires
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > General Camaro Forums > Camaro Z/28 Forum - Z/28 Specific Topics


Reply
 
Thread Tools
Old 07-06-2014, 03:17 PM   #43
Skylane765

 
Skylane765's Avatar
 
Drives: 14 Z/28, Challenger Hellcat.
Join Date: May 2012
Location: San Diego
Posts: 3,078
Quote:
Originally Posted by Caswell239 View Post
I'm interested to know. My old 2011 ram 1500 learned two different sets. I had stockers I ran in winter and 22s in the summer. I could swap tires all around the truck or back and forth to summer to winters and it knew exactly was going on all the time. Never had to relearn. Wonder if the Maro is the same
What happens if you rotate them? Yes if the sensor is cloned, then you just swap and no big deal. But our owners manual says if we change sensors we have to learn the sensor.
Skylane765 is offline   Reply With Quote
Old 07-06-2014, 03:28 PM   #44
alv927
 
alv927's Avatar
 
Drives: 2013 camaro 2ss/rs dusk edition
Join Date: Aug 2013
Location: florida
Posts: 405
Quote:
Originally Posted by backtotintops View Post
My car is white and white is always supposed to hide dirt better but after washing her I take a speed run to dry and in 2 miles she is dirty again back on the lower door and rear fenders.

Hopefully Skylane is working on a kit to run these http://*******/JvHUrj
Wheres the logic in that? White does "NOT" hide dirt better its the fastest color to show dirt...Mid colors are better dirt camouflage , gun metal grey etc.....
alv927 is offline   Reply With Quote
Old 07-06-2014, 03:29 PM   #45
Skylane765

 
Skylane765's Avatar
 
Drives: 14 Z/28, Challenger Hellcat.
Join Date: May 2012
Location: San Diego
Posts: 3,078
Yes a sensor can be cloned, but you need the number off the one that's in the tire you are changing. I do not want to break all the tires down. So I will just lure the new tire. It takes a more costly coning tool to do it. It's good for shops to do it, because it takes less time to clone than learn.
Skylane765 is offline   Reply With Quote
Old 07-06-2014, 06:18 PM   #46
brt3
Runs with scissors...
 
brt3's Avatar
 
Drives: '14 Z/28s SIM/SW
Join Date: Jan 2013
Location: Austin, TX
Posts: 1,421
Quote:
Originally Posted by Norm Peterson View Post
brt - thanks for the tire review...

As far as TPMS on a track day tire & wheel setup goes - does anybody really pay attention to the TPMS when they're out there on the track at speed? You aren't likely to hear any little beep with a full-face helmet on and the windows open at 100+ mph or at WOT in the lower gears.
When I'm on-track I'm alternating between oil temp & pressure and TPMS. The Trofeo Rs have a fairly narrow window, regarding optimal pressure, and running in high temperatures makes it very hard to get this just right. The "do not exceed" pressure is 34, and optimal is 32. So, yes -- I often have the TPMS screen up when I'm on the track...
__________________
brt3 is offline   Reply With Quote
Old 07-06-2014, 08:50 PM   #47
Zfatuated

 
Zfatuated's Avatar
 
Drives: BAC Mono
Join Date: Apr 2013
Location: Reno
Posts: 869
Quote:
Originally Posted by brt3 View Post
When I'm on-track I'm alternating between oil temp & pressure and TPMS. The Trofeo Rs have a fairly narrow window, regarding optimal pressure, and running in high temperatures makes it very hard to get this just right. The "do not exceed" pressure is 34, and optimal is 32. So, yes -- I often have the TPMS screen up when I'm on the track...


Ditto for me

Tire temp on TPMS is the primary thing I watch when on track. Too high psi, I end the session. Oil temp I watch for curiosity knowing I'm going to get two indications (A/C cutoff, then a warning light) if it gets hot.
__________________
2014 Z/28, White
"I wasn't asked to make it cheap...I was asked to make it FAST!" Mark Stielow, the new Z/28.

Zfatuated is offline   Reply With Quote
Old 07-06-2014, 09:14 PM   #48
White_SS/RS

 
White_SS/RS's Avatar
 
Drives: 14 1LE
Join Date: Mar 2013
Location: Spokane, WA
Posts: 1,564
Quote:
Originally Posted by brt3 View Post
When I'm on-track I'm alternating between oil temp & pressure and TPMS. The Trofeo Rs have a fairly narrow window, regarding optimal pressure, and running in high temperatures makes it very hard to get this just right. The "do not exceed" pressure is 34, and optimal is 32. So, yes -- I often have the TPMS screen up when I'm on the track...
Quote:
Originally Posted by Zfatuated View Post


Ditto for me

Tire temp on TPMS is the primary thing I watch when on track. Too high psi, I end the session. Oil temp I watch for curiosity knowing I'm going to get two indications (A/C cutoff, then a warning light) if it gets hot.
Interesting. Do you guys commonly have large differences in tire pressures, session to session? What happens when you exceed 34 psi?
__________________
LMS Engineering
White_SS/RS is offline   Reply With Quote
Old 07-07-2014, 08:59 AM   #49
Norm Peterson
corner barstool sitter
 
Norm Peterson's Avatar
 
Drives: 08 Mustang GT, 10 Legacy 2.5GT, ...
Join Date: Jul 2012
Location: Eastern Time Zone
Posts: 4,113
I guess I have to assume that the TPMS pressure display really is sufficiently readable under at least some bright daylight conditions (the message panel on my car is not good enough for track driving use, even if I'm not wearing sunglasses, never mind that it doesn't feature an individual tire pressure display screen).

How accurate are the numbers it displays? Have people checked all of them against their own pressure gauges for a range of pressures? Pressure transducers are still mechanical in nature and thus subject to tolerances affecting accuracy . . .


Norm
Norm Peterson is offline   Reply With Quote
Old 07-07-2014, 09:22 AM   #50
backtotintops

 
backtotintops's Avatar
 
Drives: 14 Z/28 0#
Join Date: May 2013
Location: NY
Posts: 770
Quote:
Originally Posted by alv927 View Post
Wheres the logic in that? White does "NOT" hide dirt better its the fastest color to show dirt...Mid colors are better dirt camouflage , gun metal grey etc.....

you are right...I should have said better than the last 2 fast black cars I've had.
__________________
"PTM11" Search & Destroy
backtotintops is offline   Reply With Quote
Old 07-07-2014, 11:54 AM   #51
White_SS/RS

 
White_SS/RS's Avatar
 
Drives: 14 1LE
Join Date: Mar 2013
Location: Spokane, WA
Posts: 1,564
Quote:
Originally Posted by Norm Peterson View Post
I guess I have to assume that the TPMS pressure display really is sufficiently readable under at least some bright daylight conditions (the message panel on my car is not good enough for track driving use, even if I'm not wearing sunglasses, never mind that it doesn't feature an individual tire pressure display screen).

How accurate are the numbers it displays? Have people checked all of them against their own pressure gauges for a range of pressures? Pressure transducers are still mechanical in nature and thus subject to tolerances affecting accuracy . . .


Norm
It's easily readable and has pressures for each tire on one screen. The numbers seem to be accurate to the mechanical gauge I have by +/- a pound. I don't use the tire display and prefer an actual gauge when working with tire pressures at the track. For me it's just easier, if a small adjustment is needed, I'm right there by the valve stem and I don't have to worry about tolerance differences from sensor to sensor.
__________________
LMS Engineering
White_SS/RS is offline   Reply With Quote
Old 07-07-2014, 12:29 PM   #52
brt3
Runs with scissors...
 
brt3's Avatar
 
Drives: '14 Z/28s SIM/SW
Join Date: Jan 2013
Location: Austin, TX
Posts: 1,421
Quote:
Originally Posted by Norm Peterson View Post
I guess I have to assume that the TPMS pressure display really is sufficiently readable under at least some bright daylight conditions ...
Yes; it's very bright and easily readable at a quick glance...

Quote:
Originally Posted by Norm Peterson View Post
How accurate are the numbers it displays?
I'd say it's within 1/2 a pound, based on my readings. I always cross-check pressures with a digital gauge that reads to .1 psi, and the TPMS readout always seemed close to those measurements...
__________________
brt3 is offline   Reply With Quote
Old 07-07-2014, 12:33 PM   #53
brt3
Runs with scissors...
 
brt3's Avatar
 
Drives: '14 Z/28s SIM/SW
Join Date: Jan 2013
Location: Austin, TX
Posts: 1,421
Quote:
Originally Posted by White_SS/RS View Post
Interesting. Do you guys commonly have large differences in tire pressures, session to session? What happens when you exceed 34 psi?
The car starts to feel a touch loose and greasy, IMHO, and you really start to feel this at 36 psi.

I'll ask Zfat to confirm this, but I think -- in the high temps of Thunderhill -- that 27 psi cold resulted in 33 psi hot. Quite the swing, and one reason the TPMS readout is a handy tool...
__________________

Last edited by brt3; 07-07-2014 at 01:24 PM.
brt3 is offline   Reply With Quote
Old 07-07-2014, 01:02 PM   #54
Skylane765

 
Skylane765's Avatar
 
Drives: 14 Z/28, Challenger Hellcat.
Join Date: May 2012
Location: San Diego
Posts: 3,078
I have found that a hand gauge and the DIC are very close. If they are within 1/2 lb then that's fine for 20 to 40lbs. Need closer for low 5 to 20 lbs.
Skylane765 is offline   Reply With Quote
Old 07-07-2014, 02:57 PM   #55
White_SS/RS

 
White_SS/RS's Avatar
 
Drives: 14 1LE
Join Date: Mar 2013
Location: Spokane, WA
Posts: 1,564
Quote:
Originally Posted by brt3 View Post
The car starts to feel a touch loose and greasy, IMHO, and you really start to feel this at 36 psi.

I'll ask Zfat to confirm this, but I think -- in the high temps of Thunderhill -- that 27 psi cold resulted in 33 psi hot. Quite the swing, and one reason the TPMS readout is a handy tool...
If your running consistent lap to lap and session to session the tire temps should be stabilizing within +/- a pound each run. Of course significant changes in the weather will effect that, but once your tires reach operating temp, say 130*(after a lap or two) they should stay at that temp and corresponding pressure.

For example I set my tires at 26 when I get to the track, after a couple warm up laps I hit it hard for 20-30 minutes. It usually puts me around 33 psi. I will adjust if needed for the given conditions that day, but after that first run I'm usually set for the rest of the day.

I guess I'm just wondering why it needs monitoring during the session. Unless it's just curiosity cause I understand that too.
__________________
LMS Engineering
White_SS/RS is offline   Reply With Quote
Old 07-07-2014, 03:31 PM   #56
brt3
Runs with scissors...
 
brt3's Avatar
 
Drives: '14 Z/28s SIM/SW
Join Date: Jan 2013
Location: Austin, TX
Posts: 1,421
Quote:
Originally Posted by White_SS/RS View Post
If your running consistent lap to lap and session to session the tire temps should be stabilizing within +/- a pound each run. Of course significant changes in the weather will effect that, but once your tires reach operating temp, say 130*(after a lap or two) they should stay at that temp and corresponding pressure.

For example I set my tires at 26 when I get to the track, after a couple warm up laps I hit it hard for 20-30 minutes. It usually puts me around 33 psi. I will adjust if needed for the given conditions that day, but after that first run I'm usually set for the rest of the day.

I guess I'm just wondering why it needs monitoring during the session. Unless it's just curiosity cause I understand that too.
First, I'd never run at Thunderhill before my recent weekend there. Second, we had multiple runs over the course of the day (four, I think) so the variation in ambient between morning and afternoon was substantial. Third, I'm learning the car and the tire, and was unsure where I'd need to start to end up in the 32-34 range given the high temp of 106 degrees. Fourth, Pirelli claim the optimal pressure for this tire is 2 bar/30 psi. I was trying to find the optimal tire pressure window but I didn't buy the 30 psi scenario on a car with the weight of the Z/28.

After driving at Thunderhill, I believe the sweet spot is 32-34 psi. There was a tire expert, Guy Gamba, who was at the track measuring tread temps and pressures. He knows the Trofeo R very well, and thought the optimal pressure was 32 psi. I'm a little less positive about that, as his guys waited about 8-10 minutes -- after I was parked at their temporary "shop" -- to check temps and pressures...
__________________
brt3 is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:30 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.