Kgolf's Official STX Build

[Kgolf31]

Originally Posted by Ginger_Extract

Which diff did you end up deciding on?

I'll probably go with a diffsonline 3 clutch custom ramp diff

[Kgolf31]

Originally Posted by chris82

Yea I hear ya. I'd be curious when or if you do eventually upgrade, what difference it'd make.

Really in reality, probably not that much difference.

TCKs have a unique shock dyno curve developed for BMWs, specifically that exact Model you purchase. Many high end shocks are sometime rebuilt to model TCKs curves by end users

[chris82]

Originally Posted by Kgolf31

Really in reality, probably not that much difference.

TCKs have a unique shock dyno curve developed for BMWs, specifically that exact Model you purchase. Many high end shocks are sometime rebuilt to model TCKs curves by end users

Wish I knew someone nearby who had a set of more track focused setup with TCK DAs, ST|G has them, but he runs stock springs IIRC.

[Kgolf31]

Minor updates.

Installed AA Headers with Off-Road Tune

Ordered a 3 Clutch Custom Ramps Differential from diffsonline!

[Ginger_Extract]

Originally Posted by Kgolf31

Minor updates.

Installed AA Headers with Off-Road Tune

Ordered a 3 Clutch Custom Ramps Differential from diffsonline!

You'll love the diff. FWIW: I went with Whiteline poly diff bushings, minor increase in NVH, mainly in the >4000rpm diff whine. Beyond that, no vibes, shaking, harshness, etc.

[Kgolf31]

Originally Posted by Ginger_Extract

You'll love the diff. FWIW: I went with Whiteline poly diff bushings, minor increase in NVH, mainly in the >4000rpm diff whine. Beyond that, no vibes, shaking, harshness, etc.

Cool. I was looking into AKG bushings and was wondering. How hard is install?

[Nugget]

I'd recommend the whiteline ones as well. For me it was a major decrease in NVH as I had solid aluminium ones previously

[Kgolf31]

Originally Posted by Nugget

I'd recommend the whiteline ones as well. For me it was a major decrease in NVH as I had solid aluminium ones previously

I could care less about NVH honestly. I just can't go solid aluminium because per STX rules, I need to maintain the same amount of rubber and not increase metal content in the bushing.

The issues with Whiteline is that they don't list the durometer easily

[Taskmaster]

Any updates?

[Kgolf31]

Sorry, I've been mostly updating via the Official STX Page

TL;DR Version

Headers Work
Diff Works
9" 255 RE-71Rs work

[cmark8]

Kgolf31 will 255 RE-71R be able to withstand road racing (track day) temps?

[Kgolf31]

Originally Posted by cmark8

Kgolf31 will 255 RE-71R be able to withstand road racing (track day) temps?

As far as temps, yes. I've have pryometer temps exceeding 140*F across the face and haven't had then grease over yet.

Typically, we spray tires to cool them down to optimal temperatures. I haven't had to do this yet.

In the past, ZII and RS3v2 require extensive spraying.

[PKumarM3]

great journal

what type of power did u see the AA tune (street one) give you?

and also, higher end dampers will be more confident inspiring and each adjustment is tangible. ask me how I know ? i went from TC Kline to Motons on my e46 m3. the difference was immediately noticeable.

the only thing is, you are not tracking, you're auto-x'ing - so the surface is far from ideal for race dampers. stick w/the tck. cheap and good enough.

[Kgolf31]

Originally Posted by PKumarM3

great journal

what type of power did u see the AA tune (street one) give you?

and also, higher end dampers will be more confident inspiring and each adjustment is tangible. ask me how I know ? i went from TC Kline to Motons on my e46 m3. the difference was immediately noticeable.

the only thing is, you are not tracking, you're auto-x'ing - so the surface is far from ideal for race dampers. stick w/the tck. cheap and good enough.

With tune only I was around 210 whp IIRC with 198 ft lbs. nothing real major.

The TCKs are good entry level, high grade shocks. Each click on compression is very noticeable. Are Motons probably more distinct? Probably.

During the SCCA ProSolo Finale I had issues with rear sliding out and trouble power down. Jacked up rebound on all 4 corners, went 2 clicks down on front and rear compression and dropped considerable time from 5th to 1st to take the ProFinale win and overall ProSolo Championship in STX.

Pimp shocks are still popular in autocross, the bumpier surfaces actually make this desire even more great because steady state isn't there very long so the valving is critical.

Will I upgrade? Eventually. But things are good enough now and newer more expensive shocks will lead me with tenths in overall improvement

[RyanDavies]

Kyle is just going to wait for me to start road racing again and sell him my JRZs for pennies on the dollar.

[Taskmaster]

Notice anything with the intake?

[Kgolf31]

Originally Posted by TheAxiom

Notice anything with the intake?

Not getting driven for a bit lol

[Taskmaster]

Originally Posted by Kgolf31

Not getting driven for a bit lol

What's the daily driver?

[Kgolf31]

Originally Posted by TheAxiom

What's the daily driver?

Honda HRV. Very sporty

[dhaval]

Have you every had any issues with heating? How do you monitor your temps since 128s don't have a temp gage.

I had an interesting thing happen to me at the track the other day. Towards the end of my last 3 sessions on day 2, my throttle was completely non responsive. When it decided to respond again, it would pick a random rpm between 4k and 6k and not rev past it. There were no warning lights or codes being thrown.

I have done countless autocross events in the car without any issue. My best guess is that something heated up and the car went in limp mode. Heard about such a thing happening on 128s before?

Stock engine, AA-tune, BMW PE Exhaust

[RyanDavies]

There is a coding option that reduces engine power when the brakes overheat. Likely caused by the rear brakes overheating in a track environment as a result of e-diff engagement. Both of which can be disabled.

[bNks334]

Originally Posted by dhaval

Have you every had any issues with heating? How do you monitor your temps since 128s don't have a temp gage.

I had an interesting thing happen to me at the track the other day. Towards the end of my last 3 sessions on day 2, my throttle was completely non responsive. When it decided to respond again, it would pick a random rpm between 4k and 6k and not rev past it. There were no warning lights or codes being thrown.

I have done countless autocross events in the car without any issue. My best guess is that something heated up and the car went in limp mode. Heard about such a thing happening on 128s before?

Stock engine, AA-tune, BMW PE Exhaust

Pull codes. I bet you were throwing the brake temp overheating code RyanDavies mentioned. No CEL, but the car reduces power. I had it happen to me last year on track. I coded it off recently and didn't have any issues at all this past weekend at NJMP.