If you're going for a track only car, you could go stiffer than 9k/10k. AST is a great option though and we can work with you on rates.

18k on street tires is pretty darn stiff...most successful auto-x EVOs out here run around 12k front 16k rear. The 2008 STU national champ was even softer than that (in an STI, yeah i know not an evo ;)).

- Andrew

Yes it is a track only car now. What rates would you suggest? I run a front splitter/rear gt wing w/275 NT01's. Powerwise around 400ish whp. I run FIR/PIR tracks etc here in the southwest.

The more I read the more Im liking AST. Looking forward to ordering some up.

Ah right. I forgot about those. You want to talk to Chris Mayfield from Denver. He setup the AST 4100s for Hsun Chen's SM evo this year. I drove that car last summer after they first got them. It was underdamped, but still really fast. Later in the summer they revalved and fixed it and Chris went on to win the national championship in SM and was on the cover of SportsCar last month. FYI: the springrates are in that 16-18k range. :)

Also, talk to Brian Hanchey. He's the go-to guy for AST in the US. Conveniently, he's in central Texas.


d

Right you are. Although all of those folks are running a larger rear bar. With the stock rear bar, you can run 18k in the rear and get around the same roll rates. However, you get less wheel lift and more predictable corner exit behavior. Combined with an uprated rear diff, this makes fast. For me, 2010 was all about finding exit speed.

Indeed, but I wouldn't call the Heartland Park setup typical. :lol:

d

EDIT: Another point of data. I ran a 14k R 18k R setup last weekend at the track with 255/40/17 RS3 tires. Even at the comparatively low levels of grip, the chassis still _moved_. It's not oversprung and the dampers are set to ~70% critical for those rates.

It's okay if the chassis moves a little bit :lol:

I understand where you're coming from and it does often result in a great handling car. We tend to start softer for most people unless they have an idea of what they're getting into. With a little bit of aero and decent tires I'd have no problems recommending something 12k and up for a track only car.

- Andrew

You in the office tomorrow Andrew? Gonna call and order some up.

Feeling a bit under the weather and might work from home. Myles will be in and I'll brief him. :)

- Andrew

Called to order no one was home :(

sending you a PM....myles and carol were getting things ready for going to PRI.

Offtopic: Ah. Wish I had known, I would have liked to grab a beer. I was only there for W/Thr.

d

My brother moved to albuquerque, next time i'm in town i'll send you a pm. {thumbup}

- andrew

just to comment on the spring rates... I would recommend at least the 12k/16k combo. It worked very well for me...and I would've gone higher if I had a shock that could dampen it!

not one person even talked about the fortune auto coilovers lol.

Gtworx will take care of you for whatever u need {thumbup}

I would say that he's received good advice then.

No word of FA coilovers....and he's working with GTWorx... sounds like a win-win to me!

I was trying to learn a bit about the FA coilovers, but really leaning toward the AST's for a while now. I'm on Buddy Club racing specs now...have been for about 150,000 miles now lol they eek and pop (top mounts binding up), but they still work. they've been good, but noisy as of late, and the lack of a bracket for the brake line caused an issue at around 70,000 miles on the interstate at 90mph behind an 18 wheeler....

I'm looking to most likely go with a 10k/12k setup. the buddy clubs are 10k/10k now. I autocross when I can (work gets in the way a lot), but the car is mostly street driven. I race only on street tires, so I need something that works well with them. very good thread. I may be ordering the AST 4100's soon.