Maximum camber on a 981
08-05-2018, 11:03 PM
#1
Burning Brakes
Thread Starter
Maximum camber on a 981
Anyone know the maximum camber you can get from a 981? I have a 2013 Boxster S with PASM and am thinking about adjusting the suspension, but the max camber is small, I probably won't bother.
08-06-2018, 09:05 AM
#3
Rennlist Member
Can probably get -1.5 with PASM, at least -1.0. It's not really worth messing with without camber plates or LCA's, as pointed out above. -1.5 will still leave your outside edges getting eaten alive if you drive hard at the track.
08-06-2018, 09:07 AM
#4
What do you consider small? I think the factory settings on my PASM equipped 981 GTS was -1.0° in the front and -1.5° in the rear. Front also has +8° of caster. When I looked there was a good 9mm of additional space in the slotted strut towers to dial in more negative camber in the front.
08-06-2018, 09:13 AM
#5
The camber adjustment built into these cars is designed to account for minor differences chassis to chassis as they come off the assembly line. (At least that’s what my friend who is a Porsche mechanic told me.). As a result the amount of camber adjustment is fairly small and varies a bit between cars. On my X73 suspension we were able to get about -2.0 front and I think close to -1.4 rear. I still eat up tires, so use tires that can be flipped on the rims for best results. Yes, the adjustable control arms will be going in soon.
12-19-2019, 05:58 PM
#6
Rennlist Member
Does anyone know if the rear strut towers are slotted? I assume not since the camber is adjustable via the eccentric bolt, but can't hurt to ask i guess. Every bit of neg camber helps!
12-20-2019, 09:07 AM
#7
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Here are some data points for a 981 car with X73: To achieve even tire wear during track day use you will need -2.5 front and rear. I could get -2.0 front and rear with stock suspension parts. You will get less negative camber with stock non-X73 suspension, not sure about PASM. I added GT3 LCAs to front and Tarrett adjustable rear toe links to achieve -2.5 front and rear. FWIW, the OEM rear camber specs with X73 are a maximum of -2.0 rear camber, can't recall what front spec limit is.
I get asked frequently if the -2.5 camber is bothersome during street driving to which I reply no, it isn't. If you drive thousands of miles on street wtih -2.5 you will see noticable uneven tire wear, insides wearing more of course.
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12-20-2019, 12:12 PM
#9
Rennlist Member
I think i'll shoot for -2.8 to -3.0 up front which i can hopefully get with 10mm shims (GT3 LCAs) and the strut mounts pushed all the way in. I'm afraid if i run more shim than that i'll run into issues with the tie rod ends not being long enough. What do you guys think?
I've heard the toe links are also a limiting factor on rear neg camber. :/
I'm running a time trial series that classes via mod points so i'm trying to avoid all the aftermarket parts i can to avoid taking points for them.
On my old E36 track car i ran -3.5 up front with zero toe. I didn't drive the car much on the streets, but i drive it on 8hr trips to various tracks and it drove fine and the tire wear was fine. Inside tire wear is more due to toe.
I've heard the toe links are also a limiting factor on rear neg camber. :/
I'm running a time trial series that classes via mod points so i'm trying to avoid all the aftermarket parts i can to avoid taking points for them.
On my old E36 track car i ran -3.5 up front with zero toe. I didn't drive the car much on the streets, but i drive it on 8hr trips to various tracks and it drove fine and the tire wear was fine. Inside tire wear is more due to toe.
Last edited by txbdan; 12-20-2019 at 02:01 PM.
12-20-2019, 01:57 PM
#10
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I think i'll shoot for -2.8 to -3.0 up front which i can hopefully get with 10mm shims and the strut mounts pushed all the way in. I'm afraid if i run more shim than that i'll run into issues with the tie rod ends not being long enough. What do you guys think?
I've heard the toe links are also a limiting factor on rear neg camber. :/
I'm running a time trial series that classes via mod points so i'm trying to avoid all the aftermarket parts i can to avoid taking points for them.
On my old E36 track car i ran -3.5 up front with zero toe. I didn't drive the car much on the streets, but i drive it on 8hr trips to various tracks and it drove fine and the tire wear was fine. Inside tire wear is more due to toe.
I've heard the toe links are also a limiting factor on rear neg camber. :/
I'm running a time trial series that classes via mod points so i'm trying to avoid all the aftermarket parts i can to avoid taking points for them.
On my old E36 track car i ran -3.5 up front with zero toe. I didn't drive the car much on the streets, but i drive it on 8hr trips to various tracks and it drove fine and the tire wear was fine. Inside tire wear is more due to toe.
12-20-2019, 01:59 PM
#11
Rennlist Member
If you are asking about adding wheel spacer shims and pushing the top of the front struts all the way in with stock 981 S model LCAs adjusted all the way out for negative camber, I don't think you can get more than -2.1 or -2.2 regardless of what OEM suspension you have.
12-20-2019, 06:22 PM
#12
Rennlist Member
I think i'll shoot for -2.8 to -3.0 up front which i can hopefully get with 10mm shims (GT3 LCAs) and the strut mounts pushed all the way in. I'm afraid if i run more shim than that i'll run into issues with the tie rod ends not being long enough. What do you guys think?
I've heard the toe links are also a limiting factor on rear neg camber. :/
I'm running a time trial series that classes via mod points so i'm trying to avoid all the aftermarket parts i can to avoid taking points for them.
On my old E36 track car i ran -3.5 up front with zero toe. I didn't drive the car much on the streets, but i drive it on 8hr trips to various tracks and it drove fine and the tire wear was fine. Inside tire wear is more due to toe.
I've heard the toe links are also a limiting factor on rear neg camber. :/
I'm running a time trial series that classes via mod points so i'm trying to avoid all the aftermarket parts i can to avoid taking points for them.
On my old E36 track car i ran -3.5 up front with zero toe. I didn't drive the car much on the streets, but i drive it on 8hr trips to various tracks and it drove fine and the tire wear was fine. Inside tire wear is more due to toe.
12-20-2019, 06:34 PM
#13
Rennlist Member
What suspension/ride height? Do you know how much LCA shim exactly? Thanks for the info!
12-21-2019, 10:25 AM
#14
Rennlist Member
KW V3, ride height ~2" lower than stock. I don't know exactly how much LCA shim, but I would estimate 15mm. It has the largest shim and then a few tiny shims on each side and I seem to recall large one is 10mm alone.