Sebring, BRZ & Tarmac II's
 

So I'm attending my first HPDE in a twin and was wondering if anyone had any setup recommendations for one running RCE Tarmac II's. (Bump & Rebound).


All my previous HPDE's were in a 3,600lb AWD understeering pig (in the background of the pic below) so the transition to a RWD over-steering BRZ should lead to a fun weekend.

http://www.challengepromotions.com/W...Rebuild/86.jpg

The settings in the manual are a good starting point. Tune to preference/track from there. Since Sebring is a bit bumpy you might want to bump back compression/rebound a couple clicks. Of course the rest of your setup will also determine how your dampers are set.

Opie... do you work at a subie dealer?

I bought your LGT if you are who I think you are... :)

I do, I sold my ABP LGT to a guy from New York in 2010...was wondering if it would ever surface again. Still in good shape?

I's start here and add bump in 2 click increments. I would NOT rely on rebound to calm the car thru turns 17 and 1. Seems like backwards thinking but it works.

Front rebound 10 clicks ( from full stiff)
Front bump 12 clicks

Rear rebound 13 clicks
Rear bump 8 clicks.

Randy Pobst ran the Chin Motorsports car there and loved it. That car DID have 500 lb springs on it and ran close settings to this but with 3 clicks MORE bump damping.

Myles

Thanks Myles! I actually had the Chin car at my house for a few months (I fixed a tranny issue for them that came up at the May Sebring event) and loved it, I am building my BRZ using a lot of info I learned from the Chin car.

My BRZ is currently set as you listed above, alignment & corner balancing was done today. Ready to go get some seat time in a week and a half.

Thanks for that info, Myles. Do you remember the ride height and camber settings when Randy drove that Chin Motorsports car?

A guy from New York is me :) Moved to Chicago about two years ago.

I sold the car about two years after I bought it from you. Added a DP and TMIC and a tune for a little more power, but left it pretty much as is otherwise. It was very tastefully modified so I didn't need to do anything. :)

Looks like we both wanted to move to something lighter and more fun! I got my FRS a few months ago and have taken it to a couple of track events. A ton of fun so far.

Good to reconnect again!

They're posted somewhere in the suspension forum, but I'd have to dig for them. They're surprisingly not that aggressive.

- Andrew

Found the set up that Randy drove. From the earlier pages in the thread the spring rates seem to be 560 lb/in (10k) - they are running NT01s.

I've been thinking about going from 400/400 on my T2s to something stiffer like 504/616 (9k/11k). You have any experience with that set up on the T2s? I'm looking for a little bit more rotation and it still isn't quite there with the Perrin RSB I have on now. I might play with the damper settings this weekend though to see if I can get it just where I want it.

I believe he was on the standard 400/400 rates, and added the stiffer springs later.

- Andrew

500/600 is my current T2 setup (autocross application FYI). It does rotate better than my old 400/500 setup, to the point that I actually took some rear bar out. Definitely worth a shot.

I use the car primarily on the track. Don't do as much autox anymore. I was looking at starting with 500 lb in the rear and tuning from there with the rear swaybar. I'll definitely give it a try first before going higher.

Man, that just seems like a setup that would understeer much more than I would want and certainly more than my car does. Even with 1* more camber in the front than the rear and no toe my car on T2s with standard springs and suggested settings understeered more that I like.