Which e90 For NASA TT & Semi DD?

[bigjae1976]

From what I'm gathering...you need to carefully choose your mods before you start TT. Right now both my M3 and 330 would get pummeled by TTA cars unless I de-mod or go balls to the wall.

[RickyBobby]

Originally Posted by JMK007

Math is not my strong suit but I believe I am correct. Specifically, I would not purchase shocks with "external reservoris or more than two ranges..." (under rule 1) or a shaft more than 40 mm (under rule 2). Instead, I take 4 pts for "inverted shocks" (under rules 3 and 4) and 2 pts for springs (under rule 5):

3) Non-BTM or modified/re-valved shocks/struts/dampers +3 (all others)(springs not included)
4) Changing the mounting orientation/design of the BTM shock and/or spring perch in order to
invert the shocks/struts (includes non-BTM inverted shocks/struts) +1
5) Non-BTM or modified coil springs, leaf springs/spacers/brackets, or torsion bars +2

Nope, the ast 5100's have a shaft >40mm so they will cost you +7 pts.

[JMK007]

Originally Posted by RickyBobby

Nope, the ast 5100's have a shaft >40mm so they will cost you +7 pts.

Ricky Bobby,

You are right if I bought the AST 5100s. However, the 4100s are 22 mm:

AST 4100

» Rebound Adjustable ("Singles")
» 22mm diameter shaft struts, non-inverted
» Steel cylinder body shocks, non-inverted
» Rubber bushings for "eye" shock mounts
» Optional spherical upper shock mount assemblies
» Non-synthetic hydraulic fluid

Also, it appears these are non-inverted so it would only be 3 pts for the shocks and 2 pts for springs (totalling 5 pts).

[JMK007]

Originally Posted by klammer

This is a great discussion. Would love to get together in Chicago and discuss this a bit more. I know nothing about this, but know these tracks and would love to discuss racing here in the Midwest. Good luck

I'd more happy to meet up... Just shoot me a PM. Today may be the day I pull the trigger on a car. Will keep people posted... Thanks to everyone for a great discussion thus far.

[JMK007]

UPDATE - NEW CAR PURCHASE: This will certainly come as a curve ball to those who have been following this thread. I bought a car today but it was none of the three options I had been contemplating. I got an amazing deal trading my '10 GTI for a 2012 328i, sport package, that had less than 4K miles. I absolutely love the car.

So what does this mean for my NASA TT plans? They are still on--just different. A 2012 BMW 328i conveniently falls into TTD. Thus, I could run the car in near stock form in TTD (taking an automatic 5 pts for turbo). With a car this new, I may just run it in TTD with the stock suspension and Nitto NT-01s 235/40/17. I know it will probably not be competitive but I just can't see ditching an oem sport suspension with less than 4K miles. The other option is to shoot for TTC but I think I may wait a year or so for that.

[GTM_Challenge]

Originally Posted by klammer

This is a great discussion. Would love to get together in Chicago and discuss this a bit more. I know nothing about this, but know these tracks and would love to discuss racing here in the Midwest. Good luck

I'd be down to meet up. Having run TT the past little bit, I can tell you there's a somewhat specific method to being competitive.

[mid-corner fun]

Originally Posted by JMK007

UPDATE - NEW CAR PURCHASE: This will certainly come as a curve ball to those who have been following this thread. I bought a car today but it was none of the three options I had been contemplating. I got an amazing deal trading my '10 GTI for a 2012 328i, sport package, that had less than 4K miles. I absolutely love the car.

So what does this mean for my NASA TT plans? They are still on--just different. A 2012 BMW 328i conveniently falls into TTD. Thus, I could run the car in near stock form in TTD (taking an automatic 5 pts for turbo). With a car this new, I may just run it in TTD with the stock suspension and Nitto NT-01s 235/40/17. I know it will probably not be competitive but I just can't see ditching an oem sport suspension with less than 4K miles. The other option is to shoot for TTC but I think I may wait a year or so for that.

congrats, now you need to strip some weight to be competitive, about 1000lb I'd say

TTD is Miata & Spec e30 territory on this side of the world but hey you never know. Good luck and let us know how it goes.