Can't cut a good 0-60 launch on Michelin PS4S

piercekjp2 · 04-12-2020, 09:38 PM

Hey guys, new to the forums.

Let me preface my issue. Purchased my '16 2SS M6 stock close to a year ago, absolutely love it. When I bought it the dealership replaced the stock tires with brand new Uniroyal Tiger Paw GTZ stock size tires; on these tires after some practice I was able to pull low 4's consistently (0-60) with a best 4.0 while using the stabiltrack launch control (launching about 4200 rpm) on the street with 30psi and moderate burnout before (just enough to see a little smoke from the rear).

Fast forward to these last few weeks I upgraded all 4 tires to Michelin PS4S (295/35 rear 265/35 front) on stock wheels. The Uniroyals lasted about 18k miles or so but even at the end of their lifespan was able to pull 4.5 or so launches. With my new tires I haven't been able to get below 4.8 and most of the time 5.0 using my same method (even manually launching at low rpm). I have even tried lowering rear psi to 24.

Anyone got a clue or any tips on launching on the street with Michelin PS4S? I thought for sure I would be hitting 3.8-3.9 times with these tires.

Thanks in advance!

z28pat · 04-13-2020, 08:27 AM

I wonder if those times are Accurate because your rear tires are now taller than the oem tires. That’s gonna throw off your speedo and gears.

KingLT1 · 04-13-2020, 09:52 AM

Quote:

Originally Posted by z28pat

I wonder if those times are Accurate because your rear tires are now taller than the oem tires. That’s gonna throw off your speedo and gears.

Nope... Tire size has to be corrected in the ECU for the performance timer and speedometer to be accurate.

piercekjp2 · 04-13-2020, 01:49 PM

Didn’t think about that, I wouldn’t think it would have that big of an effect.

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TheRealJA105 · 04-14-2020, 09:04 AM

That tire size should only affect the speed by 1.96% so you are actually going 61.2 when the car thinks you are going 60. I would say the bigger factor was the Tiger paws were spinning on your 1-2 shift and hitting 60 before the car was actually traveling 60 and now you are hooking up on the shift.

KingLT1 · 04-14-2020, 12:50 PM

Quote:

Originally Posted by piercekjp2

Didn’t think about that, I wouldn’t think it would have that big of an effect.

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Not a huge effect but Its off about 2 tenths with the height difference.

Sixgunsled · 04-14-2020, 01:45 PM

Coming from the drag racing realm where 60ft are very important I would say its going to be hard to get low and consistent 60ft on a tire that was made for cornering. My camaro when bought new was a manual and I raced it a lot but I always ran tires for street driving and different tires for racing. On manual cars they make a huge difference.

piercekjp2 · 04-14-2020, 02:23 PM

Quote:

Originally Posted by Sixgunsled

Coming from the drag racing realm where 60ft are very important I would say its going to be hard to get low and consistent 60ft on a tire that was made for cornering. My camaro when bought new was a manual and I raced it a lot but I always ran tires for street driving and different tires for racing. On manual cars they make a huge difference.

Yeah, what did you go with for the drag pack setup? I would like to take mine to the strip after all this crap blows over.

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KingLT1 · 04-15-2020, 10:29 AM

grab a set of 17x10 and run a 305/45/17 for the strip.

piercekjp2 · 04-15-2020, 02:18 PM

Quote:

Originally Posted by KingLT1

grab a set of 17x10 and run a 305/45/17 for the strip.

No other mods to make em fit besides relocating driver side rear wheel well hardness?

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KingLT1 · 04-15-2020, 03:14 PM

Nope

Vtor_ZL1 · 04-15-2020, 03:43 PM

Grippier tire typically means more RPM at launch.. treat gas pedal like gradual lever.. instead of On-OFF switch

Kerry · 04-21-2020, 08:19 PM

Does it spin more or seem to bog more?

Kerry · 04-23-2020, 08:24 AM

So i did a test. I have 295/35/20 on the car and they are close to wore out but. I did 0 100 with the speed o at 27.35 in hp tuners. That seems to be correct for that tire. I then moved the setting to the 26.95 that the car had set stock. The difference in times was not much if any on the car. First run was 3.7 to 60 and 7.6 to 100. Then changeing to the stock size of 26.95 it was 3.9 and 7.8. So i put it back to the 27.35 and did another pass and it was 3.9 and 7.8 again. da was 2000. So its not much and certinaly not a half second for the differenc in size speed o setting. I always use the launch control on the car and its a 10 speed. I can not dupalcate its repeatability. I can no doi as good as it does either. So for what uits worth.

04-12-2020, 09:38 PM	#1
piercekjp2 Drives: '16 Chevrolet Camaro 2SS Join Date: Apr 2020 Location: New Orleans, Louisiana Posts: 23	Can't cut a good 0-60 launch on Michelin PS4S Hey guys, new to the forums. Let me preface my issue. Purchased my '16 2SS M6 stock close to a year ago, absolutely love it. When I bought it the dealership replaced the stock tires with brand new Uniroyal Tiger Paw GTZ stock size tires; on these tires after some practice I was able to pull low 4's consistently (0-60) with a best 4.0 while using the stabiltrack launch control (launching about 4200 rpm) on the street with 30psi and moderate burnout before (just enough to see a little smoke from the rear). Fast forward to these last few weeks I upgraded all 4 tires to Michelin PS4S (295/35 rear 265/35 front) on stock wheels. The Uniroyals lasted about 18k miles or so but even at the end of their lifespan was able to pull 4.5 or so launches. With my new tires I haven't been able to get below 4.8 and most of the time 5.0 using my same method (even manually launching at low rpm). I have even tried lowering rear psi to 24. Anyone got a clue or any tips on launching on the street with Michelin PS4S? I thought for sure I would be hitting 3.8-3.9 times with these tires. Thanks in advance!

04-14-2020, 01:45 PM	#7
Sixgunsled Drives: 2017 camaro SS 1LE Join Date: Jan 2017 Location: North Carolina Posts: 159	Coming from the drag racing realm where 60ft are very important I would say its going to be hard to get low and consistent 60ft on a tire that was made for cornering. My camaro when bought new was a manual and I raced it a lot but I always ran tires for street driving and different tires for racing. On manual cars they make a huge difference. __________________ 2017 1000+hp Camaro SS 88/96 single turbo manual to TH400 swap 15" conversion Port injection 22K+ followers on Instagram @Sixgunsled 6.4K subscribers YouTube: Sixgunsled

04-15-2020, 10:29 AM	#9
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,799	grab a set of 17x10 and run a 305/45/17 for the strip. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

04-15-2020, 03:14 PM	#11
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,799	Nope __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

04-15-2020, 03:43 PM	#12
Vtor_ZL1 Who Needs to KNOW? Drives: 18 ZLE Join Date: May 2018 Location: Left Side of the Moon Posts: 1,771	Grippier tire typically means more RPM at launch.. treat gas pedal like gradual lever.. instead of On-OFF switch __________________ ing for grip. Are you in the NY/NJ/PA/CT region? Join us for autox fun at MetLife Stadium. HUGE lots, tons of runs. http://www.motorsportsne.com/

04-13-2020, 08:27 AM	#2
z28pat Drives: 2002 z28, 2018 2ss 1LE Join Date: Sep 2012 Location: Parrish, Florida Posts: 835	I wonder if those times are Accurate because your rear tires are now taller than the oem tires. That’s gonna throw off your speedo and gears.

04-13-2020, 01:49 PM	#4
piercekjp2 Drives: '16 Chevrolet Camaro 2SS Join Date: Apr 2020 Location: New Orleans, Louisiana Posts: 23	Didn’t think about that, I wouldn’t think it would have that big of an effect. Sent from my iPhone using Tapatalk

04-14-2020, 09:04 AM	#5
TheRealJA105 Drives: 2013 C6Z06 Join Date: Nov 2016 Location: PA Posts: 1,577	That tire size should only affect the speed by 1.96% so you are actually going 61.2 when the car thinks you are going 60. I would say the bigger factor was the Tiger paws were spinning on your 1-2 shift and hitting 60 before the car was actually traveling 60 and now you are hooking up on the shift.

04-21-2020, 08:19 PM	#13
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	Does it spin more or seem to bog more?

04-23-2020, 08:24 AM	#14
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	So i did a test. I have 295/35/20 on the car and they are close to wore out but. I did 0 100 with the speed o at 27.35 in hp tuners. That seems to be correct for that tire. I then moved the setting to the 26.95 that the car had set stock. The difference in times was not much if any on the car. First run was 3.7 to 60 and 7.6 to 100. Then changeing to the stock size of 26.95 it was 3.9 and 7.8. So i put it back to the 27.35 and did another pass and it was 3.9 and 7.8 again. da was 2000. So its not much and certinaly not a half second for the differenc in size speed o setting. I always use the launch control on the car and its a 10 speed. I can not dupalcate its repeatability. I can no doi as good as it does either. So for what uits worth.

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