Autocross Setups

[CasualGuy]

Took delivery of H3157 last Thursday and a brand new set of 305/30R19 RE71Rs today. Couldn't find a set of lightweight AS-legal wheels without getting into ridiculously high-priced custom options (seriously, why does nobody seem to make 19x10.5 wheels?), so I'll be mounting the autocross tires to a set of refurbished OEM wheels I bought off eBay.

IMG_8146

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[TDC]

Congrats! You just dropped 2 seconds off your time.

 

[nastang87xx]

I think the OEM wheels are perfectly fine for AS. I don't have a problem with them. Lighter wheels aren't going to make a HUGE difference except maybe in braking. After all, this is autocross, not a road course were smaller marginal changes make a bigger difference. Besides, C6 GS's and C5Z's are AS kings so...lol.

 

[TDC]

C7 GS ran 1.7 secs faster than me but that was with a more experienced driver. Let's see how close I could get this weekend.

Note: at a short local autocross my 1.6 degree front camber and 36psi front 34psi rear resulted in consistent temps across the tires. Will be going to a higher speed course this weekend.

 

[nastang87xx]

I got my sh1t pushed in last weekend. Oh well. Videos coming. Was definitely not a fun course for heavy cars. A friend in an E92 wrecked me by 3 seconds but he's also a nationals level driver.

 

[nastang87xx]

Video 1. This was of my co driver. Sorry for the awful sound. I tired a different mic mounting point and it was not smart...

[ame]

 

[nastang87xx]

And me...again, bad sound.

[ame]

 

[DocWalt]

So there's talk of swapping front swaybars. What's the hot setup here? Has anybody just drilled holes in the swaybar to make it adjustable? That was a common mod with the Focus RS because swapping the swaybar was a lot bigger job than it is on the Mustang.

 

[boardkat]

paulson drilled his stock FSB out; i'm sure he'll pipe in at some point (packwood pro this weekend, so maybe not..)

don't think he replaced the stock bushings though; can't recall why (extra rate from bind?) - if you do though, ES has a part (i picked a set up awhile back and they fit fine):
https://www.amazon.com/gp/product/B000CN7C1K/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

when i was in FS with my S197, the car felt much better (and faster) with higher rate FSB vs. RSB - and i know james likes this setup on his S550 too (after running an RSB for awhile, against my advice, lol).

 

[DocWalt]

I figured the FSB would be an improvement, but I've done exactly ten runs on small lots... Not much feedback yet, the balance feels ok but it takes a bit to transition in slaloms and I think the FSB would be a big help there. I don't see how a RSB would be any benefit, lol

Drilling should be worth ~40% stiffer or something like that, just eyeballing it.

BTW, the stock GT350 bar is 34mm OD, so the linked bushings won't work for anybody that's looking to upgrade.

 

[RustedAngel]

For anyone wondering - there is not a Bump Steer Kit that fits our 350s out right now. I bought the Cortex to find that out the hard way.

 

[boardkat]

BTW, the stock GT350 bar is 34mm OD, so the linked bushings won't work for anybody that's looking to upgrade.

my bad, i saw autox and an FSB modification and immediately ASSumed we were talking FS :doh:

carry on!

 

[DocWalt]

So... How badly classed is the GT350 in AS/SS?

I got stomped at a recent event by a top level national driver, 1.9 seconds off in scratch time... A week after I raw timed him (scratch time vs scratch time, to be fair ) while running a friend's FoRS at the Oscoda ProSolo. I didn't have a perfect drive, but I only had ~5 tenths to find according to data. Maybe I was massively under-driving, but it seemed to be understeering almost everywhere. Also, first time on this lot in any car ever, so... it was super bumpy and grip was inconsistent, 1.25 G one corner, 1.05 the next.

SoloStorm had some OBD2 wackiness here, but whatever. I ran the car in track mode, nannies off, dampers in sport (to try and tame the rear end a bit... but I was glad I ran sport due to the bumpiness)

[ame]

 

[nastang87xx]

For anyone wondering - there is not a Bump Steer Kit that fits our 350s out right now. I bought the Cortex to find that out the hard way.

Well that's a kick to the dick! Were you able to return it?

 

[Mach4.6]

So... How badly classed is the GT350 in AS/SS?

I got stomped at a recent event by a top level national driver, 1.9 seconds off in scratch time...

Should be competitive in AS, what tires you running?

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