[Z06] Help with pfadt alignment specs
06-20-2018, 01:12 AM
#1
Burning Brakes
Thread Starter
Help with pfadt alignment specs
So the shop that I plan to take C6Z to get aligned wants to know from the pfadt street performance with street tires specs what the toe is in degrees not inches and if that is total toe or per side. Here is the link to the pfadt specs: http://www.pfadtracing.com/blog/wp-c...-alignment.pdf
Thanks!
Thanks!
Last edited by 03Zcrit; 06-20-2018 at 01:13 AM.
06-20-2018, 10:02 AM
#3
Melting Slicks
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My alignment machine reads in degrees too, and it's a hassle to change into inches...
I set mine with ~ .05* toe in F, .15* toe in R. (each) I think 0 F toe is still within factory spec.
There's been some debate whether Pfadt's toe recommendations are toe out or toe in.
Normal (every brand I've ever seen!) aligners read toe out as - and toe in as +, but Pfadt shows - readings F and R. Typical track alignments use a smidgen of toe OUT at the front, for better turn in, but toe IN at the rear for stability.
If the car isn't tracked exclusively, but also street driven, I'd avoid toe out in the front. Tires are pretty tolerant of the extra negative camber, but not so much with the toe out. The minor improvement in turn in at the track will be accompanied by a major reduction in tire life.
I'd avoid toe out in the rear on a C6. It might make your track day more exciting than you want!
I set mine with ~ .05* toe in F, .15* toe in R. (each) I think 0 F toe is still within factory spec.
There's been some debate whether Pfadt's toe recommendations are toe out or toe in.
Normal (every brand I've ever seen!) aligners read toe out as - and toe in as +, but Pfadt shows - readings F and R. Typical track alignments use a smidgen of toe OUT at the front, for better turn in, but toe IN at the rear for stability.
If the car isn't tracked exclusively, but also street driven, I'd avoid toe out in the front. Tires are pretty tolerant of the extra negative camber, but not so much with the toe out. The minor improvement in turn in at the track will be accompanied by a major reduction in tire life.
I'd avoid toe out in the rear on a C6. It might make your track day more exciting than you want!
Last edited by Nowanker; 06-20-2018 at 10:02 AM.
06-20-2018, 11:14 AM
#4
Yep, negative camber within reason does not destroy tires. Excessive toe (specifically when combined with negative camber) will absolutely destroy tires.
A little bit of toe will not wear tires too much, certainly the amount you prescribe (1/16") wont shred them too bad.
I would say when in doubt go with 0 toe to be safe...that said a little bit of toe in the proper amounts can give an advantage, but for the most part bad driving will hurt lap times 10X compared to an alignment.
JMO.
A little bit of toe will not wear tires too much, certainly the amount you prescribe (1/16") wont shred them too bad.
I would say when in doubt go with 0 toe to be safe...that said a little bit of toe in the proper amounts can give an advantage, but for the most part bad driving will hurt lap times 10X compared to an alignment.
JMO.
06-20-2018, 12:18 PM
#6
Melting Slicks
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There are charts published.
Measuring toe in inches is inherently inaccurate, due to differences in tire diameters...
1/16 or 1/8 just sort of shows a 'trend' (imo...)
Measuring toe in inches is inherently inaccurate, due to differences in tire diameters...
1/16 or 1/8 just sort of shows a 'trend' (imo...)
06-20-2018, 05:21 PM
#9
Premium Supporting Vendor
My alignment machine reads in degrees too, and it's a hassle to change into inches...
I set mine with ~ .05* toe in F, .15* toe in R. (each) I think 0 F toe is still within factory spec.
There's been some debate whether Pfadt's toe recommendations are toe out or toe in.
Normal (every brand I've ever seen!) aligners read toe out as - and toe in as +, but Pfadt shows - readings F and R. Typical track alignments use a smidgen of toe OUT at the front, for better turn in, but toe IN at the rear for stability.
If the car isn't tracked exclusively, but also street driven, I'd avoid toe out in the front. Tires are pretty tolerant of the extra negative camber, but not so much with the toe out. The minor improvement in turn in at the track will be accompanied by a major reduction in tire life.
I'd avoid toe out in the rear on a C6. It might make your track day more exciting than you want!
I set mine with ~ .05* toe in F, .15* toe in R. (each) I think 0 F toe is still within factory spec.
There's been some debate whether Pfadt's toe recommendations are toe out or toe in.
Normal (every brand I've ever seen!) aligners read toe out as - and toe in as +, but Pfadt shows - readings F and R. Typical track alignments use a smidgen of toe OUT at the front, for better turn in, but toe IN at the rear for stability.
If the car isn't tracked exclusively, but also street driven, I'd avoid toe out in the front. Tires are pretty tolerant of the extra negative camber, but not so much with the toe out. The minor improvement in turn in at the track will be accompanied by a major reduction in tire life.
I'd avoid toe out in the rear on a C6. It might make your track day more exciting than you want!
06-21-2018, 12:39 AM
#10
Burning Brakes
Thread Starter
The plan for the car is autocross, canyon carving and maybe a HPDE or two on sticky street tires. Going off Nowanker's recommendation for toe settings and Pfadt's performance street settings I will be telling the shop tomorrow to shoot for these numbers:
Front Camber (degrees): -1.3
Front Caster (degrees): 8.5
Front Total Toe (degrees): .05 TOE IN (.025 per side)
Rear Camber (degrees): -0.9
Rear Total Toe (degrees): .15 TOE IN (.075 per side)
Front Camber (degrees): -1.3
Front Caster (degrees): 8.5
Front Total Toe (degrees): .05 TOE IN (.025 per side)
Rear Camber (degrees): -0.9
Rear Total Toe (degrees): .15 TOE IN (.075 per side)
Last edited by 03Zcrit; 06-21-2018 at 12:40 AM.