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Old 05-22-2019, 10:04 AM   #1
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Track alignment

Getting her all dialed-in.....


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Old 05-22-2019, 10:25 AM   #2
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Do you have GT3 LCAs on the front?
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Old 05-22-2019, 11:59 AM   #3
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Do you have GT3 LCAs on the front?
Yup.
Here's where we ended up (below).
They didn't feel there was enough adjustment available to get to -3d. Could be that the FVD LCA's are shorter? I dunno. They've got a BUNCH of shim in it.

Anyway.... I'm excited to try it out.

I also added raybestos st43 pads. They're NOISY! But man.... they WORK!

Looking forward to that too.


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Old 05-22-2019, 12:04 PM   #4
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That should transform your car and work really well. You don't mention what tires you are running but for an NT-01 or RR you should be in good shape. Enjoy!
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Old 05-22-2019, 01:09 PM   #5
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your caster is out of spec. as you shim out the arms, you push the bushing that connects the thrust arm out (caster arm, tuning fork, etc.) and pull the wheel assembly forward as a result (thrust arms are not adjustable). if you look at your car you'll probably see the wheel sitting forward in the wheel well. depending on the width of wheel/rubber/spacer/offset you are running you might get some rubbing too.

here is a thread on how to fix; involves swapping the lcas and using the other opening in the thrust arm bushing:

https://rennlist.com/forums/996-forum/1143460-suspension-adjustment-to-correct-caster.html

or, if no rubbing, you may be happy with how the increased caster impacts your handling.
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Old 05-22-2019, 01:25 PM   #6
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Thanks radium king. I was aware of the offset hole "swap", and have them oriented to the front already.
I "may" decide to do something different over the winter when I do coilovers, but for now, I'm going to see how much I hate 9d. Haha

And yes, nt01 tires are mounted on my spare wheels and ready to go. (Any recommendation for optimal hot pressure on the NT01?)

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Old 05-22-2019, 05:24 PM   #7
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I prefer a bit of toe out for sharper turn in and a bit less toe in out back.

2.9 is decent on nt01s but i still find i wear the outside edge. My next alignment i will be setting front camber at neg 3.25
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Old 05-23-2019, 06:14 AM   #8
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I hope that is not toe out in the back, but rather toe *in*. I use 1.5mm toe in per side, measured across a 15" span (the length of my toe sticks) and it seems to work pretty good for me.

Because your sheet lists the "approved" ranges as -1.9mm to -.6mm I am figuring that it is toe in. If that is toe out you are in for a squirrely ride However if you have already picked up the car and driven it home, you would know
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Old 05-23-2019, 06:15 AM   #9
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Looks good. I think you will like it.
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Old 05-23-2019, 07:14 AM   #10
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Quote:
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If that is toe out you are in for a squirrely ride
Specially on a wet surface..
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Old 05-23-2019, 07:31 AM   #11
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Thanks guys.
The way I read it, it's "toe-out", and a negative number, meaning it's toed-in.
Yes, I drove it home yesterday, on wet roads, no less, and it was VERY confidence- inspiring.

This is a race- shop that I know and trust. There's another that I feel the same about, based at the racetrack, so a little less convenient. Both have extensive experience with the boxster.

That said: I walked-in with a print of exactly what I thought I wanted, and then asked them to weigh-in. They concurred with my numbers, so away we went.
The numbers I had with me, were based on the experiences of y'all on this forum, and a couple of conversations in-person with MaxD. I borrowed heavily from topless, (and even used his recommendation in switching to the raybestos brakes) because he seems to have the respect of everybody else here when it comes to this stuff.
I'm excited to try it out.

I AM thinking, though, that these raybestos brakes aren't a great dual-purpose pad, simply because of how NOISY they are. I might find myself swapping them for an EBC red (ceramic, so dustless) for the street. I dunno. We'll see. Maybe they'll get better as they wear?

Somebody who uses the NT01's help me with some target pressures to begin with?

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Old 05-23-2019, 07:38 AM   #12
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i'm running 31F/32R hot. they seem to want a lower pressure than 'streety-er' tires. i have the same F/R camber settings as you, but with 245F/275R widths. i do not experience the sidewall roll at these pressures that i would with my ad08's. and they'll last a 20 minute sprint at these pressures.
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Old 05-23-2019, 07:40 AM   #13
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33psi HOT on NT01s

I start them at about 28 cold and bleed usually after the first 2 sessions depending on weather/temp, etc.

I wouldn't start below 26psi cold, but if you do, go easy for the first 2 laps
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Old 05-23-2019, 09:39 AM   #14
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After having discussions with John Gladwell, my camber is now -3.75 all around and it really works well. This is on the SPB suspension, 1/16 toe out in front and 1/8 toe in in front.
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Old 05-23-2019, 10:15 AM   #15
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square tire setup lemming?
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Old 05-23-2019, 11:16 AM   #16
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I concur with lower 30's PSI Hot for NT01s.

Hopefully the morning lows will cooperate as 26-28 is great when it is > 50F but have started at 32 when it was just above freezing. Check and bleed off as needed after a session or come in and check if they start to feel squirrely.

Also I prescribe to the Brad Roberts alignment, no toe front or rear. That's in SPB form and yes I like it a bit twitchy.
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Old 05-23-2019, 11:48 AM   #17
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In my experience, if you have the camber, the tires like a little bit lower pressure. When I ran the NT-01 at first I was 35 PSI hot all the way around, with maybe -2.0 front and -1.6 back. Once I bumped up to -3/-2.5 I was able to go a little lower, maybe 32-33 and it was good. I've never gone much lower (probably have by accident, sometimes I get crazy and bleed too much). When you get it right you will know (in addition to seeing edge tire wear, etc...) When you get them right and you get that magical session where the car just hooks up and goes where you want it to
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Old 05-23-2019, 12:04 PM   #18
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Rear Toe-in vs Toe-out

I remember that before aligning my car, the first question Steve Alarcón (local specialist) asked was "which track are you running?" Then.. he would recommend the rear toe.

If I remember correctly to be stable at high speed (Willow Springs) you want a bit of toe-in or '0' and if you were running a quick track (Streets of Willow) he would dial even a bit of toe-out to help you rotate.

Again, this was a few years ago and my memory may be wrong..
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Old 05-23-2019, 12:13 PM   #19
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I like 34psi hot all around with NT-01. When I get down to 32 I do get a bit of shoulder rollover with my car. It is a full weight street Cayman so that probably matters.

ST-43 are ridiculously noisy until the 1st track day. Once you get them fully hot they settle down but will always squeal a bit when cold. Still my favorite pad for dual purpose, long life, good modulation, great heat management.
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Old 05-23-2019, 08:59 PM   #20
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So I'm watching the weather forecast..... likely gonna rain on us.
I assume the NT01 will suck on the rain.
What do y'all do in the rain? (DE, not racing)

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