Alignment for 987 Cayman S track car?
05-16-2018, 01:34 PM
#1
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Thread Starter
Alignment for 987 Cayman S track car?
This season I'm driving a new-to-me 2006 Cayman S dedicated DE car and I'm still figuring out how to set it up for the track. The car is 100% track and never sees the street. Currently my alignment specs are;
-2.4 deg F camber
0 deg F toe per side
-2.4 deg R camber
.06 deg R toe-in per side
The suspension is highly modified with JRZ Spec Cayman coilovers (700 lb/in front, 800 lb/in rear) and monoball Tarett control arms and links everywhere. Tires are Pilot Sport Cup 2's. It also has a Guard LSD.
I've done a few track days so far and I'm seeing a bit more tire wear on the outside shoulders of the front and rear tires than on the inside shoulders. I'm thinking of adding a bit more negative camber in the interest of extending tire life. How does -2.7 deg of camber sound for front and rear?
I've also found the rear end of the car sometimes fishtails a bit under hard braking from high speed. This could be a lot of things but I'm wondering if more toe-in on the rear, maybe another 0.1 deg, would help improve rear end stability. How does .16 deg rear toe-in per side sound?
-2.4 deg F camber
0 deg F toe per side
-2.4 deg R camber
.06 deg R toe-in per side
The suspension is highly modified with JRZ Spec Cayman coilovers (700 lb/in front, 800 lb/in rear) and monoball Tarett control arms and links everywhere. Tires are Pilot Sport Cup 2's. It also has a Guard LSD.
I've done a few track days so far and I'm seeing a bit more tire wear on the outside shoulders of the front and rear tires than on the inside shoulders. I'm thinking of adding a bit more negative camber in the interest of extending tire life. How does -2.7 deg of camber sound for front and rear?
I've also found the rear end of the car sometimes fishtails a bit under hard braking from high speed. This could be a lot of things but I'm wondering if more toe-in on the rear, maybe another 0.1 deg, would help improve rear end stability. How does .16 deg rear toe-in per side sound?
10-24-2018, 02:58 PM
#2
Did you ever change the specs? I have a similar alignment now and I am looking to increase the negative camber in the front.
10-25-2018, 10:37 AM
#3
Race Director
bump it closer to 3 degrees up front, 2.6 to 2.8 in the rear. LSD will help with brake squirm. I aim for a tiny bit of toe in on the rear, with about .01 degree toe out up front
Last edited by Quadcammer; 10-25-2018 at 12:43 PM.
10-25-2018, 12:12 PM
#4
Add front camber as suggested above. A little more toe can help with the brake stability. Has the car been lowered? This can change bump steer and might be corrected by shimming the toe link.
10-25-2018, 03:10 PM
#5
3 degrees in the front feels about right but given the tire wear I see in the rear I think 2.4 is spot on. The car is lowered on Eibach springs for the time being until I come up with the bank for Tractives next spring.
10-25-2018, 06:25 PM
#6
Rennlist Member
-2.4 front is really low for a dedicated car. I run -2.7F on a dual purpose street/track. I'd start at -3 front and go from there. Rear doesn't usually need -3, but you can play around until tire wear is right and the balance feels good.