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-   -   Suggested DD/Lapping Camber Settings (https://www.ft86club.com/forums/showthread.php?t=136844)

Muskoka800 09-14-2019 02:47 PM

Suggested DD/Lapping Camber Settings
 
No flaming please. Constructive suggestions appreciated.
Some day soon my pile of aftermarket goodies will be installed with an alignment following. I’m sure the experienced alignment tech at Burning Rubber will have his thoughts but your’s are valued as well.
DD about 20kl or 12 miles per year (no winter) and maybe 5 track days annually. My in-educated thoughts are -2.5 front and -1.5 rear.
Mod’s will include;
TRD lowering springs (~1” drop)
Koni Sport Yellow (adjustable)
245 Conti ExtremeContact
Front
Camber bolts ( -1.75 max)
Peddars Top mounts ( -.75 fixed)
Rear
Adjustable LCA

Lincoln Logs 09-14-2019 07:03 PM

Get a pyrometer and use that to determine the ideal camber settings. Likely you'll want over -2* front.

Clutch Dog 09-14-2019 07:09 PM

Sean and another frien dof mine down here say the FRS/86 chassis loves camber.
But after talking with an old gumshoe of an alignment guy and my shop owner we decided on Neg 2.5 front and Neg 2 rear for dual sport autox/daily/track

autox can eat up like neg 3 or more camber, but on bigger tracks with more speed you want a bigger contact patch.

churchx 09-14-2019 08:03 PM

I guess his biggest question was optimum camber in relation to his DD mileage vs planned track day count. Pyrometer is good way to find optimum camber for one specific use, not so much what somewhat averaged optimum for mixed mileage would be.
Hmm, my choice would be .. while something like -2.3F/-1.8R would be somewhere in between DD/track setup, 5 trackdays .. have potential to wear most of full thread depth of tire set, so i'd probably would optimize more for track, with eg. -3F/-2.5R.

new2subaru 09-14-2019 09:11 PM

I think -2.5F and -1.5R is a good starting point. You’re right though, the tech at Burning Rubber will let you know where you need to be.

strat61caster 09-14-2019 09:56 PM

I'm at -4.1 and -2.3, coming up on a year at those numbers.
I'd suggest -3 and -2 to start, 2.5/1.5 won't be bad, but you'll destroy the shoulders of the Contis before track day #5 if you're able to drive the car at 9/10ths consistently, the extra half a degree will help if you can get it.

NoHaveMSG 09-15-2019 01:02 AM

Quote:

Originally Posted by strat61caster (Post 3257493)
I'm at -4.1 and -2.3, coming up on a year at those numbers.
I'd suggest -3 and -2 to start, 2.5/1.5 won't be bad, but you'll destroy the shoulders of the Contis before track day #5 if you're able to drive the car at 9/10ths consistently, the extra half a degree will help if you can get it.

I ran -3F/-2R for a while and it was a good mix. I didn't start getting noticeable camber wear on the street till I went to mid 3's in the front.

redlined600 09-15-2019 01:57 PM

Quote:

Originally Posted by Clutch Dog (Post 3257462)

autox can eat up like neg 3 or more camber, but on bigger tracks with more speed you want a bigger contact patch.

???

Depending on your skill level and how you drive you may end up doing more damage to the tires with lack of camber than daily driving with lots of camber. No matter what it's going to be a compromise that isn't optimal to either situation.

I think you're pretty close with your guess, Imo, somewhere in the -2.5(if you're a less aggressive driver) to -3(if you're more aggressive) in the front and -2 ish in they back. Either way running zero toe will help your wear.

Clutch Dog 09-15-2019 04:43 PM

Quote:

Originally Posted by redlined600 (Post 3257617)
???

Depending on your skill level and how you drive you may end up doing more damage to the tires with lack of camber than daily driving with lots of camber. No matter what it's going to be a compromise that isn't optimal to either situation.

I think you're pretty close with your guess, Imo, somewhere in the -2.5(if you're a less aggressive driver) to -3(if you're more aggressive) in the front and -2 ish in they back. Either way running zero toe will help your wear.

the eating up I implied wasnt tire wear, but saying that autox could ask for up to neg 4.5 camber. ive seen it. you really almost cant get enough on RE71's in the short track


now for street use and what I run is 0 toe. its more stable at higher speeds and corner entry at tracks while youd perfer to run a smidge toe out for autox but thats highly dependant on personal preference

Muskoka800 09-16-2019 02:08 PM

No AutoX in my plans.
DD and Lapping TMP.
Sounds like 0 toe with -2.5 to -3 up front and -1.5 to -2 at the rear. I'll discuss those numbers with the alignment guru at Burning Rubber when that time comes, hopefully soon.

Thank you all for your informed opinions.

Clutch Dog 09-16-2019 05:02 PM

Quote:

Originally Posted by Muskoka800 (Post 3257957)
No AutoX in my plans.
DD and Lapping TMP.
Sounds like 0 toe with -2.5 to -3 up front and -1.5 to -2 at the rear. I'll discuss those numbers with the alignment guru at Burning Rubber when that time comes, hopefully soon.

Thank you all for your informed opinions.

If anything you should talk to the guys at Speed Academy, theyd know the good set up for TMP as well as familiar with the FRS chassis. literally, hit them up on instagram, they will respond.

Lynxis 09-16-2019 08:13 PM

Quote:

Originally Posted by Clutch Dog (Post 3258023)
If anything you should talk to the guys at Speed Academy, theyd know the good set up for TMP as well as familiar with the FRS chassis. literally, hit them up on instagram, they will respond.

This. I also have similar usage case as you. Around 15000 kms daily driving and 4 track days and ~8 autocross events per year.

I've run a few alignment setups now and I found even with -2.2f/-1.7r I had noticeable outer shoulder wear on all 4 of my track tires (Hankook RS3) that was noticeable after the 1st season so it was clear that more camber was needed.

I then went to -3f/-2.2r and I've been running that for 3 years now. Outer camber wear didn't get any worse on my track tires and there is no additional inner camber wear on my street tires so I think this is the sweet spot for me. Tire pyrometer also gave very even readings from left to right at 26psi hot front, 28psi hot rear with this setup, maybe 5-7c spread from left to right.

I will note that both alignments were set with 0 toe.

NoHaveMSG 09-16-2019 09:01 PM

Quote:

Originally Posted by Lynxis (Post 3258072)
26psi hot front, 28psi hot rear with this setup, maybe 5-7c spread from left to right.

That seems really low to me but the pyro don't lie. I ran 32-34PSI hot on RS3's.

Lynxis 09-18-2019 02:00 AM

Quote:

Originally Posted by NoHaveMSG (Post 3258088)
That seems really low to me but the pyro don't lie. I ran 32-34PSI hot on RS3's.

I haven't run the tires since last year and I can't remember what I ate for supper yesterday so... it's totally possible I'm remembering incorrectly. Thinking harder, those may have been cold pressures.


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