Track Alignment

Mn23 · 06-15-2019, 09:37 PM

Quote:

Originally Posted by AlWakRa

Do you have true coilover setup at the back?

The front camber looks good for slicks, I would prefer less at the rear. As for extreme summer tires, I got luck with around -2.7 front camber and -2.0 rear, 0 or a hair toe out front with stock rear toe in value, and around +6 caster.

About rear sliding, maybe too much rear toe in.

I have divorced setup in the rear, will lessen the camber in the rear to around -2 first.

Thanks Rusty, I’m currently at +6 caster, is there any cons for going +7?

Rusty · 06-15-2019, 09:43 PM

Quote:

Originally Posted by Mn23

I have divorced setup in the rear, will lessen the camber in the rear to around -2 first.

Thanks Rusty, I’m currently at +6 caster, is there any cons for going +7?

No.

AlWakRa · 06-16-2019, 01:53 PM

Quote:

Originally Posted by Mn23

I have divorced setup in the rear, will lessen the camber in the rear to around -2 first.

Thanks Rusty, I’m currently at +6 caster, is there any cons for going +7?

So the rears aren't that hard, it may even be on the soft side, as most divorced setups focused on track have an equal or stiffer rear spring rates compared to fronts. I would suspect camber + toe in. I used to have a lot of toe in rear, around 0.9 total toe in, and the rears were sketchy and love to slide even with semi-slicks, getting it down to stock toe in value made it very sticky even with street tires.

Second guess would be very low rear height which mess the rear geometry.

Rusty · 06-16-2019, 06:29 PM

Quote:

Originally Posted by AlWakRa

So the rears aren't that hard, it may even be on the soft side, as most divorced setups focused on track have an equal or stiffer rear spring rates compared to fronts. I would suspect camber + toe in. I used to have a lot of toe in rear, around 0.9 total toe in, and the rears were sketchy and love to slide even with semi-slicks, getting it down to stock toe in value made it very sticky even with street tires.

Second guess would be very low rear height which mess the rear geometry.

People don't realize this when they lower the rear. The rear camber curve is not linear.

Mn23 · 06-16-2019, 07:54 PM

Yes I am planning to raise the height a bit as it is quite low. My spring rates are quite stiff at 20k front and 18k rear. Should I set the rears height a bit higher than the fronts?

My rear slicks were somehow sliding a lot at the last track day, I thought the tires were done. My rear toe is at 0.07

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06-16-2019, 07:54 PM	#5 (permalink)
Mn23 Base Member Join Date: Jun 2016 Location: GTA Posts: 49 Drives: 17 Black 370Z Rep Power: 9	Yes I am planning to raise the height a bit as it is quite low. My spring rates are quite stiff at 20k front and 18k rear. Should I set the rears height a bit higher than the fronts? My rear slicks were somehow sliding a lot at the last track day, I thought the tires were done. My rear toe is at 0.07