Increased tire width and camber?
03-04-2009, 01:54 PM
#1
Nordschleife Master
Thread Starter
Increased tire width and camber?
I've made the jump from 245's on 15's to 275's on 17's for this year. I need to align the car before this weekends test and tune at Barber. So, should I start at my old alignment settings of -3.5F/-2.25R? Does increasing tire width make a difference on optimal camber? Tires are R6's for the record.
I will of course be taking tire temps coming of hot to determine the best settings but need to make an initial setting before hitting the track.
Other info that may be important.
Wt - 2,500 lbs
Springs - 600 lbs all around torsion delete
30 mm bar front/19 mm bar rear.
I will of course be taking tire temps coming of hot to determine the best settings but need to make an initial setting before hitting the track.
Other info that may be important.
Wt - 2,500 lbs
Springs - 600 lbs all around torsion delete
30 mm bar front/19 mm bar rear.
03-04-2009, 01:57 PM
#2
Nordschleife Master
As a general rule, a wider tire needs less camber, however, there are a number of variables in play and the tire temps will be the best to determine optimum alignment.
03-04-2009, 02:05 PM
#4
Nordschleife Master
Thread Starter
03-04-2009, 06:06 PM
#5
Rennlist Member
Professional Racing and Driving Coach
03-04-2009, 10:03 PM
#7
Nordschleife Master
Thread Starter
Trending Topics
03-05-2009, 10:08 AM
#8
Rennlist Member
At -3.5 degrees you are already running more camber than the Hoosier R6 really needs. Different cars require different settings of course and I know nothing about your car, but Hoosier advises that -3.0 degrees is optimum and the generally accepted range is -2.5 to -3.0
I was running -2.7 degrees on my car when I had a 225 tire up front. When I moved to a 245 I dropped my camber to -2.5 degrees. Perhaps I could take a little more camber and trade wear for speed, but generally speaking the wider tire needs less camber.
I was running -2.7 degrees on my car when I had a 225 tire up front. When I moved to a 245 I dropped my camber to -2.5 degrees. Perhaps I could take a little more camber and trade wear for speed, but generally speaking the wider tire needs less camber.
03-05-2009, 01:37 PM
#9
Rennlist Member
Those camber numbers sound close enough to start with, you'll probably be taking some out of the front.
How much caster are you running? Which steering rack? You can run slightly lower caster to ease the effort with the manual rack but you will need to run a little more camber than you normally would to make up for the lost camber gain.
I bet you are going to love having all that rubber. You've got enough power to make them work. I like the new look of the car too.
How much caster are you running? Which steering rack? You can run slightly lower caster to ease the effort with the manual rack but you will need to run a little more camber than you normally would to make up for the lost camber gain.
I bet you are going to love having all that rubber. You've got enough power to make them work. I like the new look of the car too.
03-05-2009, 03:03 PM
#10
Nordschleife Master
Thread Starter
Those camber numbers sound close enough to start with, you'll probably be taking some out of the front.
How much caster are you running? Which steering rack? You can run slightly lower caster to ease the effort with the manual rack but you will need to run a little more camber than you normally would to make up for the lost camber gain.
I bet you are going to love having all that rubber. You've got enough power to make them work. I like the new look of the car too.
How much caster are you running? Which steering rack? You can run slightly lower caster to ease the effort with the manual rack but you will need to run a little more camber than you normally would to make up for the lost camber gain.
I bet you are going to love having all that rubber. You've got enough power to make them work. I like the new look of the car too.
03-05-2009, 06:13 PM
#11
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Those camber numbers sound close enough to start with, you'll probably be taking some out of the front.
How much caster are you running? Which steering rack? You can run slightly lower caster to ease the effort with the manual rack but you will need to run a little more camber than you normally would to make up for the lost camber gain.
I bet you are going to love having all that rubber. You've got enough power to make them work. I like the new look of the car too.
How much caster are you running? Which steering rack? You can run slightly lower caster to ease the effort with the manual rack but you will need to run a little more camber than you normally would to make up for the lost camber gain.
I bet you are going to love having all that rubber. You've got enough power to make them work. I like the new look of the car too.
03-05-2009, 07:07 PM
#12
Rennlist Member
03-06-2009, 03:57 PM
#15
Race Director
I also think the tire temps will tell a story....you might have to make some small adjustments to camber to get things optimized......
As for having "too much" tire......for what its worth I don't think so....but I run 295 front 335 rears in my 2900lbs track car?
As for having "too much" tire......for what its worth I don't think so....but I run 295 front 335 rears in my 2900lbs track car?