Street Touring Hatchback (STH) discussion/setup

[xXDavidCXx]

I made some last minutes changes before SOLO Nationals.

I was able to shift the fuel tank left and created some more room.

Was able to reduce to 5mm spacer with room for more negative camber.

Getting another alignment today, then two test and tune sessions tomorrow, in Lincoln.


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[sean.mason.75873]

So how much wiggle room is there in the tank mounts? Interesting, I'll have to keep that in mind.

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[xXDavidCXx]

Maybe 3/8 inch.


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[xXDavidCXx]

Liners with self clearance, so not a big deal.

I wonder why there's such a big variation in clearance among posters? I'd assume different offsets and differences in actual tire width from tire to tire.

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Differences in tire are big. The 265-35/18 RE71R has a tread width of 9.7 inches.


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[xXDavidCXx]

I made some last minutes changes before SOLO Nationals.

I was able to shift the fuel tank left and created some more room.

Was able to reduce to 5mm spacer with room for more negative camber.

Getting another alignment today, then two test and tune sessions tomorrow, in Lincoln.


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Alignment tech was not very good. Only got me -1.2L and -1.4R, so a .4/.6 increase.

I’ll have to get adjustable upper arms if I want more camber, if I don’t lower the car.


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[sean.mason.75873]

Keep us posted how it goes.

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[burgerkong]

Differences in tire are big. The 265-35/18 RE71R has a tread width of 9.7 inches.


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Oh wow, those are narrow, my AR1's have an inch on them!

 

[Cliff]

Oh wow, those are narrow, my AR1's have an inch on them!

It is Tirerack's measured tread width. A corresponding measurement for your tire is not known since TR doesn't sell Nankang tires and the measurement technique uses a device that TR developed for their own use.

I measured the section width of a 265/35R18 RE71R mounted to a 9" wheel at 10.2". The published section width for this tire is 10.7" when mounted to a 9.5" wheel.

edit: Nankang has the same section width: 671mm (10.67") when measured on a 9.5" wheel: https://www.nankangtyre.co.uk/products/motorsport/ar-1/

 

[xXDavidCXx]

Here’s a video of my best T&T run from the 2019 Solo Nationals new T&T lot.

The car feels well balanced and has some understeer when pushed too far into a corner.

https://youtu.be/I7bi3RGgG20


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[sean.mason.75873]

Looks good.

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[Will_]

For DSG guys, do you left foot brake or no? If so do you feel it makes a big difference. I do not because I'm not that advanced but I would like to learn it.

My region's final event of the year is an "Enduro" where you get 3 two-lap runs instead of 5 1 lap runs. So that will be an interesting change. My car isn't setup to be competitive but I still have tons of fun!

 

[xXDavidCXx]

I don’t, a quick lift to stab the brake pedal is good enough.


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[Mini7]

How are you all dealing with the passenger side filler neck getting in the way of the rear wheel?


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The fuel filler tube appears to be a FWD rear clearance problem. I’m running -1.8 in the rear at stock ride height.

So with the Nitto NT01’s 255-40-17’s, I’ve rubbed the paint off the filler shield.

Thank you for the tip on shifting the fuel tank left.

 

[xXDavidCXx]

34 or 35 is better on higher grip surfaces if you're watching wear, but our main site is an old gravely air strip, so 32 doesn't really have much affect on tire wear, but we do go higher at places with more grip. You being on a 265/35 18 I assume, the higher pressure makes sense.

Moving this comment from the Solo National results to this thread to continue the setup discussion.



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[sean.mason.75873]

I didn't realize STH allowed intercoolers now. I'm going to struggle to get another season in GS with the thought of a trackable STH setup bouncing around in my head.



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