Trofeo tire wear and psi for road course - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Robbie1227 · 06-26-2016, 05:55 PM

Guys,
See attached photos
I have 2 track days and about 900 miles total on these Trofeos.
How many track days should I expect?
Look at the little lip rise on the tread, is that ok?
How do I know when the tires are Done, and it's time to change?
I'm sort of new to the road tracking scene and love it, but still have a lot to learn. I am planning on tracking them again on 7/9 at Homestead, and I forgot to add I live in FL and it's summer time.
What tire pressure should I be during hot laps?
I get different opinions at the track and the owners manual says like 50psi for track day, lol
Any advice is appreciated!!

Robbie1227 · 06-26-2016, 05:58 PM

Another pic!
I would love to get a few more track days out of them
I'm adding the Wickerbill this week as well

Sorry the pics are upside down, not sure why this happens to me

Robbie1227 · 06-26-2016, 06:15 PM

Also, what other track tires are you guys using?
I've heard Nitto NT01 and Toyo R888 are good
Are they better than the Pirelli Trofeo R's?
I really only use the car for the track

brt3 · 06-26-2016, 06:51 PM

On the Trofeos, w/negative camber maxed out, I find the optimal hot tire pressure to be 32 psi. 33 is tolerable, and once I get past that the tires start to feel a touch greasy at the limit. This has been verified at track events by a tire professional, measuring temps across the tread and correlating that to tire pressures.

Robbie1227 · 06-26-2016, 06:55 PM

Does that mean I need the GM track spec alignment or camber plates?

brt3 · 06-26-2016, 07:26 PM

Quote:

Originally Posted by Robbie1227

Does that mean I need the GM track spec alignment or camber plates?

That's with the GM track spec settings...

Hunt-man · 06-26-2016, 07:37 PM

So I run 27 psi cold but I'm in Portland, OR and it may be colder here. I like to see 31 or 32 psi warm.

I'm going to run mine until the cord starts to show and then I'll do burnouts to failure.

Robbie1227 · 06-26-2016, 07:46 PM

My concern is coming into a corner, braking from 135mph, and having a blowout :0
Not cool!

Robbie1227 · 06-26-2016, 07:47 PM

Ok, I'm going to set my car up to the GM track spec sheet 100% and see how that works!

Spyglass · 06-26-2016, 08:04 PM

I start at 29psi cold. I then assess how car feels. Typically I'm walking the pressure down from there.

td195f · 06-26-2016, 09:19 PM

Looking at the pictures of your tires it looks like you are running either not enough air or your camber setting is really messed up. You are rolling way over the edge. There was a tire wear indicator on the tire. In the case of the Pirelli it is the letters TWI. It is my understanding you want to have the tread wear touch it, not completely obliterate it.
The ridges (lips) of rubber are just an effect of the tire wear under track use. Bridgestone had some engineers at my last HPDE at Watkins Glen. They recommended swapping the tires side to side, so they rotate in the opposite direction, to remove that ridge. Those ridges are mighty annoying when you're driving home. Bridgestone stated that the side to side swap is even ok on a directional tire. The directional setup on a tire is for wet use to properly channel water. It makes no difference in the dry.

zcarczar · 06-27-2016, 01:42 AM

I run 28 PSI cold when I track on the Trofeos. You do need more negative camber in the front, it'll help the car corner a little harder.

X25 · 06-27-2016, 04:32 AM

I've had very similar results (though I think it took a bit more) with the camber a bit more aggressive than the GM track prep settings. The settings I found worked best is -2.8 camber up front with about 6.6 degrees caster and zero toe, (and about -2 at the rear with zero toe). You'd need camber plates for these settings.

Every tire is a bit different, and in my opinion, Trofeo Rs definitely benefit from all the camber you can throw at them. I think NT01s can be OK with a bit less camber, but they would also benefit.

Bridgestone RE71Rs will be out in Z/28 size in August, and all performance Bridgestone tires have very stiff sidewalls. It will be interesting to see how they fare on Camaros.

Robbie1227 · 06-27-2016, 05:52 AM

BTW. I started my day at 30psi cold, and never got above 36-37psi hot

I'm definitely going to get the alignment done ASAP
Can I leave the alignment settings like the ones mentioned above all the time. I only use the car to drive back and forth to the track, and then for the track day, and an occasional spirited drive around town.
I don't really have the time in my life to be Changing alignments for different uses and want the best for track performance.
Also, I've heard of camber plates before, just don't really know what they are, and exactly what they do...besides help with track alignment. Is there any downside to adding these plates?
Thanks for all the advice

06-26-2016, 05:55 PM	#1
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	Trofeo tire wear and psi for road course Guys, See attached photos I have 2 track days and about 900 miles total on these Trofeos. How many track days should I expect? Look at the little lip rise on the tread, is that ok? How do I know when the tires are Done, and it's time to change? I'm sort of new to the road tracking scene and love it, but still have a lot to learn. I am planning on tracking them again on 7/9 at Homestead, and I forgot to add I live in FL and it's summer time. What tire pressure should I be during hot laps? I get different opinions at the track and the owners manual says like 50psi for track day, lol Any advice is appreciated!! Attached Images __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ Last edited by Robbie1227; 06-26-2016 at 09:14 PM.

06-26-2016, 05:58 PM	#2
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	Another pic! I would love to get a few more track days out of them I'm adding the Wickerbill this week as well Sorry the pics are upside down, not sure why this happens to me Attached Images __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ

06-26-2016, 06:15 PM	#3
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	Also, what other track tires are you guys using? I've heard Nitto NT01 and Toyo R888 are good Are they better than the Pirelli Trofeo R's? I really only use the car for the track __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ

06-26-2016, 06:51 PM	#4
brt3 Runs with scissors... Drives: '14 Z/28s SIM/SW Join Date: Jan 2013 Location: Austin, TX Posts: 1,439	On the Trofeos, w/negative camber maxed out, I find the optimal hot tire pressure to be 32 psi. 33 is tolerable, and once I get past that the tires start to feel a touch greasy at the limit. This has been verified at track events by a tire professional, measuring temps across the tread and correlating that to tire pressures. __________________

06-26-2016, 06:55 PM	#5
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	Does that mean I need the GM track spec alignment or camber plates? __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ

06-26-2016, 07:37 PM	#7
Hunt-man Drives: 2015 Z28 + Piper Comanche Join Date: Nov 2015 Location: PDX Posts: 227	So I run 27 psi cold but I'm in Portland, OR and it may be colder here. I like to see 31 or 32 psi warm. I'm going to run mine until the cord starts to show and then I'll do burnouts to failure.

06-26-2016, 07:46 PM	#8
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	My concern is coming into a corner, braking from 135mph, and having a blowout :0 Not cool! __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ

06-26-2016, 07:47 PM	#9
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	Ok, I'm going to set my car up to the GM track spec sheet 100% and see how that works! __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ

06-26-2016, 08:04 PM	#10
Spyglass Drives: Too many Join Date: Mar 2016 Location: Big Apple Posts: 152	I start at 29psi cold. I then assess how car feels. Typically I'm walking the pressure down from there.

06-26-2016, 09:19 PM	#11
td195f Drives: 2015 Z/28 #786 Join Date: Mar 2013 Location: Hastings, NY Posts: 475	Looking at the pictures of your tires it looks like you are running either not enough air or your camber setting is really messed up. You are rolling way over the edge. There was a tire wear indicator on the tire. In the case of the Pirelli it is the letters TWI. It is my understanding you want to have the tread wear touch it, not completely obliterate it. The ridges (lips) of rubber are just an effect of the tire wear under track use. Bridgestone had some engineers at my last HPDE at Watkins Glen. They recommended swapping the tires side to side, so they rotate in the opposite direction, to remove that ridge. Those ridges are mighty annoying when you're driving home. Bridgestone stated that the side to side swap is even ok on a directional tire. The directional setup on a tire is for wet use to properly channel water. It makes no difference in the dry. __________________ 2015 Z/28 #786 - Black 2004 Silverado 3500 Dually - D'Max - Suncoast - Banks - Edge - Custom Tune by D'Max Tuner / Spitzer '32 Bantam Altered Drag Car - Blown Alcohol 380 CI Small Block Chevy

06-27-2016, 01:42 AM	#12
zcarczar Drives: 15 Z/28 Join Date: Jun 2014 Location: So Cal Posts: 262	I run 28 PSI cold when I track on the Trofeos. You do need more negative camber in the front, it'll help the car corner a little harder.

06-27-2016, 04:32 AM	#13
X25 Drives: '16 C7 Z51 Join Date: May 2012 Location: Redmond, WA Posts: 3,056	I've had very similar results (though I think it took a bit more) with the camber a bit more aggressive than the GM track prep settings. The settings I found worked best is -2.8 camber up front with about 6.6 degrees caster and zero toe, (and about -2 at the rear with zero toe). You'd need camber plates for these settings. Every tire is a bit different, and in my opinion, Trofeo Rs definitely benefit from all the camber you can throw at them. I think NT01s can be OK with a bit less camber, but they would also benefit. Bridgestone RE71Rs will be out in Z/28 size in August, and all performance Bridgestone tires have very stiff sidewalls. It will be interesting to see how they fare on Camaros. __________________ '16 Corvette C7 Z51 1LT (Build Thread) '14 AGM 1SS 1LE [COTW 11/17/14] (Build Thread) (SOLD) '13 Mazda MX-5 Club (Build Thread) '17 RAM 1500 Crew Cab 4x4 Night Edition '15 Nissan Rogue S AWD

06-27-2016, 05:52 AM	#14
Robbie1227 Drives: 2015 Camaro Z28/2016 Jeep Sahara Join Date: Mar 2010 Location: South Florida Posts: 544	BTW. I started my day at 30psi cold, and never got above 36-37psi hot I'm definitely going to get the alignment done ASAP Can I leave the alignment settings like the ones mentioned above all the time. I only use the car to drive back and forth to the track, and then for the track day, and an occasional spirited drive around town. I don't really have the time in my life to be Changing alignments for different uses and want the best for track performance. Also, I've heard of camber plates before, just don't really know what they are, and exactly what they do...besides help with track alignment. Is there any downside to adding these plates? Thanks for all the advice __________________ 2015 summit white Z28 #120 TRK DAY -Sun-Tek PPF-C protection film on 2/3 of the car, Moreno Camber plates, American Racing 2" ceramic coated LT headers and X-pipes with No Cats, Taylor red performance wires, NGK plugs, BTR Stage III Cam, MSD Atomic intake, Nick Williams 102mm throttle body, Stage 2 CNC Ported Heads by WCCH, MGW short throw shifter, oil catch can, and a dyno tune to get me to 587 RWHP and 516 RWTQ GONE: 2013 Summit White Camaro ZL1 M6 Roto-Fab CAI, Kooks headers and CAT delete, ATI damper and 10% pulley and balancer! Results: 576 RWHP - 540 RWTQ