Hard track use upgrades - Page 6 - MBWorld.org Forums

Go Back  MBWorld.org Forums > Mercedes-Benz AMG Vehicles > AMG GT
Hard track use upgrades >

Hard track use upgrades

Notices
AMG GT The GT/GT S is the second sports car developed entirely in-house by Mercedes-AMG. Its front mid-engine design with a rear transaxle, the use of aluminium lightweight construction and its newly developed AMG 4.0-liter V8 biturbo engine underscores the hallmark of AMG driving performance.
Sponsored by:
Sponsored by:

Hard track use upgrades

 
Old 08-13-2018, 08:18 PM
  #126  
MBWorld Fanatic!
 
Join Date: May 2008
Location: Overland Park, KS
Posts: 1,361
Thanked 197 Times in 146 Posts
‘18 GT R; ‘17 Volvo XC90 T8 Inscription; ‘14 Jeep Grand Cherokee (wife)
Originally Posted by BenzGTR View Post
Yeah they can, but the car would be programmed for those heights. I think you are fine because both front and rear both dropped similar heights (23mm front and 28mm rear) Problems are more likely to happen when you increase/decrease one and not the other.
285-30-19 653mm
335-25-20 676mm

275-35-19 676mm
325-30-20 704mm
I'll be the first to admit that I could well be wrong, but there is no way that MB changes anything programming wise between cars delivered with the OEM SC2s or the Sport Cup ZP tyres.

Bish
thebishman is offline  
Old 08-13-2018, 10:10 PM
  #127  
Member
 
Join Date: Apr 2018
Posts: 187
Thanks: 0
Thanked 25 Times in 23 Posts
2018 GTR and 2018 E63 Wagon
Originally Posted by thebishman View Post
I'll be the first to admit that I could well be wrong, but there is no way that MB changes anything programming wise between cars delivered with the OEM SC2s or the Sport Cup ZP tyres.

Bish
They would have to, for many reasons most important being legal/safety issues as the speedometer/odometer would be way off. 1" diameter (the ZP's are 4% shorter in circumference is a LOT. Every car that leaves a factory has the proper tire height programmed.
The 4% difference in circumference on these tires would be 3mph off on the speedo at 70. And the shorter diameter car would have 4% more miles on it then the taller diameter tire. On your shorter tires, your odometer would show 104,000 miles after driving 100,000. the shorter diameter car would also show 4% better gas mileage on the dash. RPM's, shift points, top speeds in each gear etc all change. Of course Mercedes would fix all that with a couple lines of code.
On another note, I figured out a way to run the Michelin slicks and not have to run skinny tires.
When I originally did the math it was for the ZP sizes, in the SC2's I can run much more appropriate widths, gonna run these sizes:
24-65-19
29-67-19
If I get my car in time and have the break in miles done I will be hitting the track Nov 17th-18th with Nasa.
BenzGTR is offline  
The Following User Says Thank You to BenzGTR For This Useful Post:
thebishman (08-14-2018)
Old 08-14-2018, 07:55 PM
  #128  
Member
 
Join Date: Aug 2017
Posts: 108
Thanked 16 Times in 10 Posts
AMG GTR, Subaru Rally Car,Model X P100D
Originally Posted by BenzGTR View Post
They would have to, for many reasons most important being legal/safety issues as the speedometer/odometer would be way off. 1" diameter (the ZP's are 4% shorter in circumference is a LOT. Every car that leaves a factory has the proper tire height programmed.
The 4% difference in circumference on these tires would be 3mph off on the speedo at 70. And the shorter diameter car would have 4% more miles on it then the taller diameter tire. On your shorter tires, your odometer would show 104,000 miles after driving 100,000. the shorter diameter car would also show 4% better gas mileage on the dash. RPM's, shift points, top speeds in each gear etc all change. Of course Mercedes would fix all that with a couple lines of code.
On another note, I figured out a way to run the Michelin slicks and not have to run skinny tires.
When I originally did the math it was for the ZP sizes, in the SC2's I can run much more appropriate widths, gonna run these sizes:
24-65-19
29-67-19
If I get my car in time and have the break in miles done I will be hitting the track Nov 17th-18th with Nasa.
Stop over thinking it. Every single magazine article done in the US with all the amazing track times with done with the ZP tires on the car. Then they didn't give them out to the US folks even though we ordered them with it. You can however just order the TPC Spec tires for the Z07 package corvette from Tire Rack. They are the best option for our car.
Brian Clarke is offline  
Old 08-14-2018, 10:34 PM
  #129  
Member
 
Join Date: Apr 2018
Posts: 187
Thanks: 0
Thanked 25 Times in 23 Posts
2018 GTR and 2018 E63 Wagon
Originally Posted by Brian Clarke View Post
Stop over thinking it. Every single magazine article done in the US with all the amazing track times with done with the ZP tires on the car. Then they didn't give them out to the US folks even though we ordered them with it. You can however just order the TPC Spec tires for the Z07 package corvette from Tire Rack. They are the best option for our car.
My post wasn't saying the ZP's arent a great option, my post was showing the differences in tire heights on a car. They are indeed the best street tire option for my car if you plan on tracking it, but by no means are the best track tire. They are the easiest way to go, but not the fastest. The fastest track tire would be Michelin S8L, then Michelin S9L, then Pirelli DH, then Hoosier A7, then R7's, but would have to run 19's all the way around for the slicks, Hoosier is now finally available in 20's for limited sizes. One benefit of the ZP's for the track besides being stickier obviously is your car will be .5" lower and theoretically accelerate quicker with a 4% steeper gear ratios.
1" rear tire height change seems to not sound like a lot to you, but for hardcore track guys the top speeds in each gear can be important, based on the track you are running.
Here are the top speeds in each gear for the standard tire and ZP's side by side
1st 46mph 44mph
2nd 72mph 69mph
3rd 96mph 93mph
4th 122mph 117mph
5th 153mph 147mph
6th 187mph 180mph

You will again think this is "overthinking" hehe, but I'm obsessed track stuff, it's a sickness
BenzGTR is offline  
Old 08-16-2018, 10:27 AM
  #130  
Member
 
Join Date: Aug 2017
Posts: 108
Thanked 16 Times in 10 Posts
AMG GTR, Subaru Rally Car,Model X P100D
Originally Posted by BenzGTR View Post
My post wasn't saying the ZP's arent a great option, my post was showing the differences in tire heights on a car. They are indeed the best street tire option for my car if you plan on tracking it, but by no means are the best track tire. They are the easiest way to go, but not the fastest. The fastest track tire would be Michelin S8L, then Michelin S9L, then Pirelli DH, then Hoosier A7, then R7's, but would have to run 19's all the way around for the slicks, Hoosier is now finally available in 20's for limited sizes. One benefit of the ZP's for the track besides being stickier obviously is your car will be .5" lower and theoretically accelerate quicker with a 4% steeper gear ratios.
1" rear tire height change seems to not sound like a lot to you, but for hardcore track guys the top speeds in each gear can be important, based on the track you are running.
Here are the top speeds in each gear for the standard tire and ZP's side by side
1st 46mph 44mph
2nd 72mph 69mph
3rd 96mph 93mph
4th 122mph 117mph
5th 153mph 147mph
6th 187mph 180mph

You will again think this is "overthinking" hehe, but I'm obsessed track stuff, it's a sickness
Come see me in Nov @ Summit and let's do some lead follow. The bearded GTR owner. I'll have a few cars out there for that event, crazy Subaru's.
Brian Clarke is offline  
Old 08-16-2018, 03:50 PM
  #131  
Member
 
Join Date: Apr 2018
Posts: 187
Thanks: 0
Thanked 25 Times in 23 Posts
2018 GTR and 2018 E63 Wagon
Originally Posted by Brian Clarke View Post
Come see me in Nov @ Summit and let's do some lead follow. The bearded GTR owner. I'll have a few cars out there for that event, crazy Subaru's.
Sounds like fun, but I'm in Arizona, the farthest I've made it is COTA. I'll be there next month again for the Nasa Nationals. Make sure and post some pics after the event!!!
BenzGTR is offline  
Old 08-26-2018, 03:42 PM
  #132  
Super Member
 
Join Date: Aug 2012
Posts: 913
Thanks: 0
Thanked 31 Times in 21 Posts
ML63 AMG
Originally Posted by BenzGTR View Post
My post wasn't saying the ZP's arent a great option, my post was showing the differences in tire heights on a car. They are indeed the best street tire option for my car if you plan on tracking it, but by no means are the best track tire. They are the easiest way to go, but not the fastest. The fastest track tire would be Michelin S8L, then Michelin S9L, then Pirelli DH, then Hoosier A7, then R7's, but would have to run 19's all the way around for the slicks, Hoosier is now finally available in 20's for limited sizes. One benefit of the ZP's for the track besides being stickier obviously is your car will be .5" lower and theoretically accelerate quicker with a 4% steeper gear ratios.
1" rear tire height change seems to not sound like a lot to you, but for hardcore track guys the top speeds in each gear can be important, based on the track you are running.
Here are the top speeds in each gear for the standard tire and ZP's side by side
1st 46mph 44mph
2nd 72mph 69mph
3rd 96mph 93mph
4th 122mph 117mph
5th 153mph 147mph
6th 187mph 180mph

You will again think this is "overthinking" hehe, but I'm obsessed track stuff, it's a sickness


just curious, what's the mechanical top speed in 7th?
ML63 AMG is offline  
Old 08-26-2018, 10:17 PM
  #133  
Member
 
Join Date: Apr 2018
Posts: 187
Thanks: 0
Thanked 25 Times in 23 Posts
2018 GTR and 2018 E63 Wagon
Originally Posted by ML63 AMG View Post




just curious, what's the mechanical top speed in 7th?
I didn't figure it out because I figured top speed would be drag limited in 7th. If you want to get theoretical top speed in 7th use this- http://www.tremec.com/calculadora.php
BenzGTR is offline  
Old 02-07-2019, 06:06 PM
  #134  
Newbie
 
Join Date: Nov 2016
Location: Sarasota Florida
Posts: 13
Thanked 1 Time in 1 Post
Mercedes AMG GT S 2015 Porsche GT3
what pads would I use for street....track with the ccb on the GTS?
janstuart is offline  
Old 02-07-2019, 07:16 PM
  #135  
MBWorld Fanatic!
 
Join Date: May 2008
Location: Overland Park, KS
Posts: 1,361
Thanked 197 Times in 146 Posts
‘18 GT R; ‘17 Volvo XC90 T8 Inscription; ‘14 Jeep Grand Cherokee (wife)
Originally Posted by janstuart View Post
what pads would I use for street....track with the ccb on the GTS?
So I have a GT R, and Iím not 100% sure that the OEM pads are the same in the GT S; although I suspect so. That being said the OEM pads in the GT R are actually a very good compromise for both Street and Track usage, so IF the GT S uses the exact same pads itís a good place to start. Itís vital though that when using the car on a road course that you monitor the pad wear diligently! If you want a better Track pad, thereís the Pagid RSC1.

Bish
thebishman is offline  
Old 02-08-2019, 01:33 PM
  #136  
Super Member
 
Join Date: Apr 2002
Location: Switzerland
Posts: 970
Thanked 4 Times in 4 Posts
Mercedes Evo II
Originally Posted by BenzGTR View Post
This! Without a doubt, Castrol SRF is by far the best brake fluid money can buy. I've tried them all on many different cars, it will never fade as long as you keep it fresh and you can go 2-3 times more track days before bleeding so the initial cost may seem high, but it saves you money in the long run.
fully agreed !!
EVOII_Racer is offline  
Old 02-08-2019, 01:50 PM
  #137  
Super Member
 
Join Date: Apr 2002
Location: Switzerland
Posts: 970
Thanked 4 Times in 4 Posts
Mercedes Evo II
Imo i strongly believe the best brake upgrade we can do is the Renntech one after talking to them extensively.

https://imageshack.com/a/img921/7585/54Yx7F.jpg not to mention itís track proven around the Ring since they are located right next to it:-)

Tilke option also seems interesting !http://tikt.de/tuning/amg-gtr/bremsen
EVOII_Racer is offline  
Old 02-09-2019, 08:43 AM
  #138  
Member
 
Join Date: Feb 2016
Location: Canada
Posts: 111
Thanked 31 Times in 19 Posts
AMG GT-S, C350, GLK, Nissan GT-R, Acura NSX, 718 Cayman
That Tikt front brake cooling duct looks very good. I sent them a message asking if it also fits the AMG GT-S with iron brakes.
descartesfool is online now  
Old 02-11-2019, 04:13 AM
  #139  
Super Member
 
Join Date: Apr 2002
Location: Switzerland
Posts: 970
Thanked 4 Times in 4 Posts
Mercedes Evo II
Originally Posted by descartesfool View Post
That Tikt front brake cooling duct looks very good. I sent them a message asking if it also fits the AMG GT-S with iron brakes.
please let us know when you get a response
EVOII_Racer is offline  
Old 02-11-2019, 06:59 AM
  #140  
Member
 
Join Date: Dec 2010
Location: Houston, TX
Posts: 78
Thanks: 0
Thanked 10 Times in 9 Posts
Lifted G500, GT-S, track Cooper S
Just chiming in on the tires...it may be a simple setting swap in STAR--on the W463 in the transmission configurations in star you can choose between 3 different tire sizes, to include ones that equate to roughly 33" in diameter (much larger than stock 31s) to allow for the traction control, speedo, ABS, etc. to properly compensate. I wouldn't put it past something similar being available in the settings for the GTR, though it may take some digging to find it.
invictusmaneo is offline  
 

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Hard track use upgrades


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: