couple of track setup questions
08-03-2016, 10:07 AM
#1
Three Wheelin'
Thread Starter
couple of track setup questions
tried to find answers in the wiki but didn't see them....
1) what are the hot pressures people run the 19" Bridgestone RE71R tires?
2) the rear of my car wiggles under hard breaking (not confidence inspiring ...)
I think this is fixable using Rear Toe settings
what toe settings are people running to fix this? the wiki is a bit vague...
3)do I need toe links to achieve the below settings on 19" OZ ultralegera HLT wheels and the RE71Rs?
from the wiki:
1) what are the hot pressures people run the 19" Bridgestone RE71R tires?
2) the rear of my car wiggles under hard breaking (not confidence inspiring ...)
I think this is fixable using Rear Toe settings
what toe settings are people running to fix this? the wiki is a bit vague...
3)do I need toe links to achieve the below settings on 19" OZ ultralegera HLT wheels and the RE71Rs?
from the wiki:
GT4 Track Setup Wiki – Version 3.0:
Moderate Track Use:
Recommended settings are:
Front: Camber -2.5 to – 2.75; Toe zero, (or maybe very slightly toe out)
Rear: Camber -2.0 to -2.25; Toe in.
Caster: Center the front wheels in the well in order to minimize potential rubbing. For most this will be around a caster of about 9. Rear caster should not be a problem at these settings.
Moderate Track Use:
Recommended settings are:
Front: Camber -2.5 to – 2.75; Toe zero, (or maybe very slightly toe out)
Rear: Camber -2.0 to -2.25; Toe in.
Caster: Center the front wheels in the well in order to minimize potential rubbing. For most this will be around a caster of about 9. Rear caster should not be a problem at these settings.
08-03-2016, 10:47 AM
#3
Nordschleife Master
Originally Posted by MarcD147
tried to find answers in the wiki but didn't see them....
1) what are the hot pressures people run the 19" Bridgestone RE71R tires?
2) the rear of my car wiggles under hard breaking (not confidence inspiring ...)
I think this is fixable using Rear Toe settings
what toe settings are people running to fix this? the wiki is a bit vague...
3)do I need toe links to achieve the below settings on 19" OZ ultralegera HLT wheels and the RE71Rs?
from the wiki:
1) what are the hot pressures people run the 19" Bridgestone RE71R tires?
2) the rear of my car wiggles under hard breaking (not confidence inspiring ...)
I think this is fixable using Rear Toe settings
what toe settings are people running to fix this? the wiki is a bit vague...
3)do I need toe links to achieve the below settings on 19" OZ ultralegera HLT wheels and the RE71Rs?
from the wiki:
1). 27 psi cold, aim for 34/35 psi hot
2). Rear toe in fixes this. I run 3mm toe in each side/6mm total. TPC toe links are supposed to fix this too
3). Yes if you want to run 19x11. No if you run. 19x10"
08-03-2016, 11:01 AM
#4
Drifting
^ Orthojoe to the rescue with the right answers! I would only recommend quoting toe in degrees/minutes/seconds since mm isn't formally standardized in terms of whether you measure center to center or edge to edge, and also whether or not you do the math to subtract the thickness of the tire to measure wheel distance. Millimeter measurement also varies somewhat based on the tires you've got on the car when you get it aligned, where degree/minute measurement does not.
08-03-2016, 11:05 AM
#5
Three Wheelin'
Thread Starter
I got the 10" wheel so I guess no links needed (yet)
thanks for all the quick answers
myBailey07 can you add this to the wiki for quick reference?
thanks for all the quick answers
myBailey07 can you add this to the wiki for quick reference?
08-03-2016, 11:10 AM
#6
Nordschleife Master
Originally Posted by jphughan
^ Orthojoe to the rescue with the right answers! I would only recommend quoting toe in degrees/minutes/seconds since mm isn't formally standardized in terms of whether you measure center to center or edge to edge, and also whether or not you do the math to subtract the thickness of the tire to measure wheel distance. Millimeter measurement also varies somewhat based on the tires you've got on the car when you get it aligned, where degree/minute measurement does not.
08-03-2016, 11:34 AM
#7
Drifting
No worries. Unless they align toe by actually using an string to measure the front and rears of the tires and noting the difference, they should be able to quote you toe in degrees instead. Computerized alignment racks usually just let you toggle between units on the display and print whatever you want. For example, camber can be expressed either in degrees with decimal (-2.5) or degrees with minutes (-2* 30").
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08-03-2016, 12:22 PM
#8
Rennlist Member
And just to add a bit make sure the machine you are using stores the settings. You don't want to go to the other end of the car and set it using deg/min when you thought it was decimal degrees. I've had this happen to me.
08-03-2016, 02:53 PM
#9
Marc, You may need rear toe links to get the camber and toe you want. I'm running -2.4 R camber and 2 mm per side toe. This is not enough toe to stop the wiggling under hard braking. Running RE-71 32 F and 34 R Hot. Currently running both bars in the middle. Going to switch to full hard F and R thinking corner entry over-steer might be from rear bump-steer and stiffening roll might help. I'm also planning to try a square tire pressure set-up.