Tire Pressure for PSS? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Pacific Auto · 01-22-2014, 01:35 AM

I am terrible at finding a setting for my 17/45R/225 PSS on stock wheels.

What would you recommend for Front/Rear PSI hot?

diss7 · 01-22-2014, 01:57 AM

Aim for 30 psi hot.

Its a good starting point.

Once you get to the point of really 'feeling' the car, try a few psi more or less, and see if you like it.

RehabJeff86 · 01-22-2014, 02:17 AM

I like mine at 36 psi hot both F/R for OEM suspension

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Pacific Auto · 01-22-2014, 02:34 AM

Quote:

Originally Posted by diss7

Aim for 30 psi hot.

Its a good starting point.

Once you get to the point of really 'feeling' the car, try a few psi more or less, and see if you like it.

Really?... I have been trying 36, 38, 40 hot!

Pacific Auto · 01-22-2014, 02:36 AM

Quote:

Originally Posted by RehabJeff86

I like mine at 36 psi hot both F/R for OEM suspension

Sent from my iPhone using TapatalkfQ

Ok, would coilovers need less or more psi? I am running Bilstiens B14's. I just bought HVT camber plates since I still have understeer.

RehabJeff86 · 01-22-2014, 02:41 AM

If ur car is understeering with coilover, try 34 psi front and 36 psi rear or go for adjustable sway bars to correct understeer, typically make rear sway stiffer to induce oversteer

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dsgerbc · 01-22-2014, 03:18 PM

How much camber are you running?

Pacific Auto · 01-22-2014, 03:57 PM

Front Driver: Front Passenger:
Camber: -1 9/16 -1 3/16
Caster: +5 7/16 +5 7/16
Lowered: 1" 1"
Toe: 0

Rear Driver: Rear Passenger:
Camber: -2 1/4 -2 1/8
Toe: In 1/16"
Lowered: 3/4" 1"

Plan is to bump the front chamber to -2 1/2 with the HVT plates.

Ranatsu · 01-22-2014, 04:21 PM

I think a good question is, what is the car doing that you don't like?

CSG David · 01-22-2014, 04:51 PM

Quote:

Originally Posted by Pacific Auto Films

Ok, would coilovers need less or more psi? I am running Bilstiens B14's. I just bought HVT camber plates since I still have understeer.

Fix the alignment. If you're on track when we're out there, don't hesitate to get in touch with @CSG Mike.

On a super side note, I'm going contact you regarding that 3M Clear Bra stuff.

smbstyle · 01-22-2014, 07:55 PM

You'll probably have to run a bit higher PSI if you are looking to get the most life out of them. I typically run 36psi hot, but the shoulders of mine are corded now.

Honestly, I really dont like the MPSS at all on track. They were a vast improvement over stock, and were good for the first two events, but by the 3rd track event I noticed horrible shoulder wear with my camber maxed out on stock suspension with the whiteline camber bolts (around -1.6* up front), and the tires just had no grip anymore. After 5 track events (8 track days total - 2 of them on the coilovers with -2* camber) with really no street driving, the shoulders on the MPSS are corded, and have no grip whatsoever.

I'm running RS3's next.

Sorry for the off topic rant, lol.

CSG David · 01-22-2014, 08:09 PM

Quote:

Originally Posted by smbstyle

You'll probably have to run a bit higher PSI if you are looking to get the most life out of them. I typically run 36psi hot, but the shoulders of mine are corded now.

Honestly, I really dont like the MPSS at all on track. They were a vast improvement over stock, and were good for the first two events, but by the 3rd track event I noticed horrible shoulder wear with my camber maxed out on stock suspension with the whiteline camber bolts (around -1.6* up front), and the tires just had no grip anymore. After 5 track events (8 track days total - 2 of them on the coilovers with -2* camber) with really no street driving, the shoulders on the MPSS are corded, and have no grip whatsoever.

I'm running RS3's next.

Sorry for the off topic rant, lol.

Need moar camber!

smbstyle · 01-22-2014, 11:50 PM

Quote:

Originally Posted by CSG David

Need moar camber!

Gah I know, camber plates are next. add it to the to-do list!

01-22-2014, 01:35 AM	#1
Pacific Auto Master Installer Join Date: Apr 2013 Drives: Scion FRS Location: Orange County, CA Posts: 216 Thanks: 4 Thanked 144 Times in 57 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Tire Pressure for PSS? I am terrible at finding a setting for my 17/45R/225 PSS on stock wheels. What would you recommend for Front/Rear PSI hot?

01-22-2014, 02:17 AM	#3
RehabJeff86 Senior Member Join Date: Mar 2013 Drives: 2013 WhiteOut FR-S Location: Dublin,CA Posts: 969 Thanks: 899 Thanked 492 Times in 306 Posts Mentioned: 67 Post(s) Tagged: 2 Thread(s)	I like mine at 36 psi hot both F/R for OEM suspension Sent from my iPhone using TapatalkfQ __________________ 2013 Scion FR-S whiteout 2012 Porsche Panamera S carbon grey 2008 Range Rover Sport SS black - sold 2004 BMW M3 alpine wies - sold

01-22-2014, 02:41 AM	#6
RehabJeff86 Senior Member Join Date: Mar 2013 Drives: 2013 WhiteOut FR-S Location: Dublin,CA Posts: 969 Thanks: 899 Thanked 492 Times in 306 Posts Mentioned: 67 Post(s) Tagged: 2 Thread(s)	If ur car is understeering with coilover, try 34 psi front and 36 psi rear or go for adjustable sway bars to correct understeer, typically make rear sway stiffer to induce oversteer Sent from my iPhone using TapatalkfQ __________________ 2013 Scion FR-S whiteout 2012 Porsche Panamera S carbon grey 2008 Range Rover Sport SS black - sold 2004 BMW M3 alpine wies - sold

01-22-2014, 07:55 PM	#11
smbstyle Senior Member Join Date: Apr 2013 Drives: 2013 SWP BRZ Location: Forsyth, GA Posts: 1,008 Thanks: 224 Thanked 681 Times in 302 Posts Mentioned: 26 Post(s) Tagged: 0 Thread(s)	You'll probably have to run a bit higher PSI if you are looking to get the most life out of them. I typically run 36psi hot, but the shoulders of mine are corded now. Honestly, I really dont like the MPSS at all on track. They were a vast improvement over stock, and were good for the first two events, but by the 3rd track event I noticed horrible shoulder wear with my camber maxed out on stock suspension with the whiteline camber bolts (around -1.6* up front), and the tires just had no grip anymore. After 5 track events (8 track days total - 2 of them on the coilovers with -2* camber) with really no street driving, the shoulders on the MPSS are corded, and have no grip whatsoever. I'm running RS3's next. Sorry for the off topic rant, lol. __________________ ----------------------------------- 2013 SWP BRZ Build Thread: http://www.ft86club.com/forums/showthread.php?t=38781

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01-22-2014, 01:57 AM	#2
diss7 Banned Join Date: Sep 2012 Drives: AE86, 2x GT86, TE27 Location: Christchurch NZ Posts: 1,478 Thanks: 826 Thanked 1,181 Times in 522 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	Aim for 30 psi hot. Its a good starting point. Once you get to the point of really 'feeling' the car, try a few psi more or less, and see if you like it.

01-22-2014, 03:18 PM	#7
dsgerbc Senior Member Join Date: Jan 2012 Drives: BRZ(sold), STI Location: A2, MI Posts: 1,915 Thanks: 176 Thanked 419 Times in 241 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	How much camber are you running?

01-22-2014, 03:57 PM	#8
Pacific Auto Master Installer Join Date: Apr 2013 Drives: Scion FRS Location: Orange County, CA Posts: 216 Thanks: 4 Thanked 144 Times in 57 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Front Driver: Front Passenger: Camber: -1 9/16 -1 3/16 Caster: +5 7/16 +5 7/16 Lowered: 1" 1" Toe: 0 Rear Driver: Rear Passenger: Camber: -2 1/4 -2 1/8 Toe: In 1/16" Lowered: 3/4" 1" Plan is to bump the front chamber to -2 1/2 with the HVT plates.

01-22-2014, 04:21 PM	#9
Ranatsu Cone basher Join Date: Mar 2012 Drives: 2017 Subaru BRZ Series.Yellow Location: Dodgin cones in San Antonio, TX Posts: 800 Thanks: 51 Thanked 256 Times in 169 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	I think a good question is, what is the car doing that you don't like?

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