Track alignment
 

Looking for track alignment specs running 255 square.

Background:
Building a salvage/ theft boxster to do endurance racing with... Mostly lemons, probably some local Champcar.
Currently have a seized strut on who knows what alignment from 20 years ago... So made sense to pick up some used coilovers with camber plates and toe links.
Alignment suggestions anyone?
Likely for kuhmo 730 or hankook RS4 type tires.

Yes I've searched here, and it's hard to narrow down setups for people running square and track only.
Picked up some rear wheels to run up front, so 255 square setup.. stock sway bars.
Will be running some DIY aero.

Disclaimer: I don't race, nor have I raced or modofied my Boxster. All knowledge I have to offer comes from having researched a lot on this site for curiosity and in preparation for casual autocross. All of my racing experience is in tuning off-road buggy coilovers, with the only commonality being a mid-engine layout. Almost everything I say here is a paraphrasing of what other people who know more than I do have said in this forum.

Depends a lot on suspension height/stiffness, but 0 toe front, 0-0.1deg toe in at the rear seems to be the norm in most threads, 1.5deg camber front and 2.0deg rear is a decent place to start at stock ride height/stiffness for safe/neutral handling. If it understeers, give it more front camber and if it oversteers add rear camber. Check tire wear after a session and adjust accordingly. I've heard of people running 3 or more degrees all around, so feel free to experiment with broad angles. As a MacPherson Strut car, lowering the Boxster introduces a substantial amount of negative camber, so keep that in mind when adjusting.


If you're running square tires, you may want to upgrade the front sway bar, otherwise you'll either oversteer a lot or eat up the front tire shoulders. To the best of my understanding, you want a little more camber at the rear than the front, about half a degree difference, to keep it neutral. More difference front/back for a tight car, and equal if you like a loose car.

Porsche killed terminal oversteer properties by giving the Boxster narrow front tires and a lot of camber at the rear. That means that you get great front-end response under low-G, quick input where the front tires are upright and the rears are angled, but as you load up it turns to understeer, as the rear tires lean into their thread and the fronts lean out of theirs. If you widen the front tires AND camber out the front tires, you'll be essentially double-dipping into the oversteer sauce, so just tread carefully when testing, these cars can be made to spin like a top if mishandled.

And of course, if someone else who actually races says something that contradicts me, take their word over mine.

I run camber 2,7 in the front & 2,4 rear. A bit toe in rear and toe out in front. This works great at the track, however I run 225 wide in front and 265 rear, so not square.