What front anti-roll bar do I want for Track Work?

[steved0x]

I'm running the Tarett GT bars, got them to try and reduce the body roll I got on the M030 OEM suspension (to try and help with tire edge wear) and I kept them on when I replaced the M030 with PSS9. I've only had 1 event on the PSS9 and it was at a brand new track so I don't have any comparison, but I'm going to Sebring this weekend so I will have some data after that.

Other combos are the Eibach matched set with adjustable rear bar, and H&R has a set of matched bars.

I got into trouble a while back by "upgrading" to the rear Eibach bar (because it had adjustability) without installing the matching front, because I didn't know it mattered. They Eibachs are stiffer, and going to just that stiff of a rear bar made the back end very twitchy. I learned quickly

The Tarett's give a range of not much stiffer than M030 up to about twice as stiff in back and a touch over twice as stiff in the front

Drilling an extra hole in a sway bar end to give a softer setting

I have heard that some spec Boxster folks that run square use the GT3 bar in front combined with the OEM bar in back, or else set the front GT bar very stiff, and the back very soft.

I also know two people (myself and another person) that ran into the following issue when running our aftermarket bars at full soft.

The Eibach bar at full soft, when combined with thicker drop links, can rub the axle and carve a groove into your drop link... (I think because the bar is a little longer on the end, see the pic below)
Drilling an extra hole in a sway bar end to give a softer setting

Edit: here is a successful report of running the eibach rear at full soft, so it was probably my user error, possibly combined with the very thick after market rear drop links I was running at the time: For sale: Eibach 3212.312 Rear Adjustable sway bar for sale

My fried tried to run his Tarett rear bar at full soft, and somehow tore up a CV Boot. I'm not sure how that happened, but that was his report. So just be aware of the geometry and check when the suspension is loaded.

So I don't have a "We all use XXXX" but I will say, make sure to get a matched set!

[AZ986S]

Originally Posted by steved0x

Edit: here is a successful report of running the eibach rear at full soft, so it was probably my user error, possibly combined with the very thick after market rear drop links I was running at the time: For sale: Eibach 3212.312 Rear Adjustable sway bar for sale

Steve, it was not your error. I have to run the rear Eibach bar in the center hole because of that issue. I use the stock drop links.

My "issue" right now is having to fight understeer when I'm pushing hard, towards the second half of a session. Maxed out on front camber, so my choice now is camber plates or LCAs since I'm not really liking the square setup. Not sure camber plates will give me enough (-2.5 to -3.0) in the front (even with my lowering springs). And LCAs are darn pricey, anyone tried the SPC adjustable control arms?