STX BRZ/FRS Setup-Discussion Thread - Page 5

dwx · 01-23-2013, 04:03 PM

This was a tech bulletin in the newest Fastrack:

Quote:

"On the Subaru BRZ/Scion FRS, the pair of OE strut tower-to-firewall braces are not considered to be a strut bar (per 12.18), and as such are not allowed to be removed, modified or substituted (per 14.2.G)."

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dwx · 02-05-2013, 09:00 PM

Saw robispec posted a pic of his brake setup, these were the rears:

Apparently the 4-pot front and these rears drop 60 lbs of weight...

OrbitalEllipses · 02-05-2013, 09:43 PM

Brakeman brakes.

The rears eliminate the parking brake, that's why the dramatic decrease. If you take a look at a motorcycle rotor, they're that same general shape with cutouts and all.

Scooby South · 06-11-2013, 08:54 PM

Just wanted to update this thread.
-The Twins seems to be a good fit in STX. Its been in the fight almost every event so far.. and has actually won a event or two. It also seems to help having an Alien Driver.

-Fighting weight appears around 2575lbs with about 250lbs of weight reduction.
-205 Hp to wheels appears to be where it is power wise with 150lbs of torque and thats on E85... expect about 190ish on a 93 tune.
-headers, Exhaust and a tune appear to be a must to be competitive nationally.
-245/255 tires seem to be split for performance. Dunlop, BFG, Hankook seem to be the favorites in Performance.
-KW, Eibach, GC and Koni seem to be the suspensions of choice right now

feel free to add anything for a general upgrade..

Bill

Scooby South · 06-11-2013, 08:56 PM

I was able to find about 7lbs weight reduction changing the front rotors to early model OE WRX Rotors.. which have less weight... about 3.5lbs a corner...

Simmons-Racing · 06-12-2013, 01:21 PM

Quote:

Originally Posted by Scooby South

Just wanted to update this thread.
-The Twins seems to be a good fit in STX. Its been in the fight almost every event so far.. and has actually won a event or two. It also seems to help having an Alien Driver.

-Fighting weight appears around 2575lbs with about 250lbs of weight reduction.
-205 Hp to wheels appears to be where it is power wise with 150lbs of torque and thats on E85... expect about 190ish on a 93 tune.
-headers, Exhaust and a tune appear to be a must to be competitive nationally.
-245/255 tires seem to be split for performance. Dunlop, BFG, Hankook seem to be the favorites in Performance.
-KW, Eibach, GC and Koni seem to be the suspensions of choice right now

feel free to add anything for a general upgrade..

Bill

It's 205whp and 164wtq

The early wrx rotors have the same thicknes?

Simmons

OrbitalEllipses · 06-12-2013, 01:30 PM

Quote:

Originally Posted by Simmons-Racing

It's 205whp and 164wtq

The early wrx rotors have the same thicknes?

Simmons

08+ WRX front rotors match BRZ front rotors.

Scooby South · 06-12-2013, 02:26 PM

Quote:

Originally Posted by Simmons-Racing

It's 205whp and 164wtq

The early wrx rotors have the same thicknes?

Simmons

sorry for the misquote on the torque.... and yessir, they even have the same markings..

...

Simmons-Racing · 06-13-2013, 08:22 AM

Quote:

Originally Posted by OrbitalEllipses

08+ WRX front rotors match BRZ front rotors.

He said early model wrx, do they fit even earlier then 08?

Simmons

MNbiker · 06-13-2013, 09:57 AM

Quote:

Originally Posted by Simmons-Racing

He said early model wrx, do they fit even earlier then 08?

Simmons

'02-'05 WRX were the same size as the '08-'10. The '06-'07 were different.

Scooby South · 06-13-2013, 09:58 AM

Eric.. 02-07 WRX rotors are the same size..just lighter.. they have less vains but everything else is the same.. markings and all. down to the 22mm stamp on them.. they have to be OE ..I have a set of CarQuest replacement rotors that are pretty standard and they ended up being heavier by 1.45 lbs ea..still lighter than the stock BRZ/FRS rotors.. but not as much as the 02-07 OEM rotors..02-13 WRX are the same size physically, but they went with heavier materials in 08.. the front Brakes is the 08 plus WRX braking system pretty much down to the ABS control unit, MC and Booster. Hope that helps clear that up..

Bill

Scooby South · 06-13-2013, 09:59 AM

Quote:

Originally Posted by MNbiker

'02-'05 WRX were the same size as the '08-'10. The '06-'07 were different.

True for the calipers that were the 4 pot.. the rotors were the same..

Simmons-Racing · 06-14-2013, 01:53 PM

I got some rotors from my parts store, saved 6.7lbs and didn't cost much.

What about the rear rotors?

Simmons

Scooby South · 06-15-2013, 11:41 AM

^^^ haven't done any comparison on the rears... They are vented so the choices get slimmer.. 06-07 WRX and 08 plus WRX... they could interchange easily enough with other models..but havn't had a chance to. Unless you wanted to go with aluminum hatted ones that are mega-expensive.

Bill

dwx · 07-06-2013, 07:16 PM

Any reason why these wouldn't be legal for STX:

http://www.racerxfabrication.com/fr-...rms/index.html

They do make them with urethane bushings on the outside. Seems like the tubular arms would be a bit lighter than the stock cast ones and adjusting the camber via the upper arm seems like a better option than the lower arm.

They also make lower arms with urethane bushings which would be STX legal and an alternative to the SPC ones.

silverhks · 07-06-2013, 07:20 PM

The Urethane Ones Appear To Be Legal, But You Could Only Use Either The Upper Or Lower...

dwx · 07-06-2013, 10:42 PM

Right, I know everyone always does the lowers but I think it's mainly because no one has ever made upper arms. Not that these are cheap, they are way more expensive than say SPC lower arms and I believe you need to supply your own bushings for the inner side. Whiteline does make some stiffer inner bushings.

Scooby South · 07-07-2013, 01:31 AM

Quote:

Originally Posted by dwx

Right, I know everyone always does the lowers but I think it's mainly because no one has ever made upper arms. Not that these are cheap, they are way more expensive than say SPC lower arms and I believe you need to supply your own bushings for the inner side. Whiteline does make some stiffer inner bushings.

As per H.1 in Street Touring:

Quote:

1. On double/unequal arm (e.g., wishbone, multi-link) suspensions,
only the upper arms OR lower arms may be modified or replaced,
but not both. Non-integral longitudinal arms that primarily control
fore/aft wheel movement (e.g., trailing arm(s) or link(s) of a multilink
suspension) may not be replaced, changed, or modified.

Vorshlag · 08-07-2013, 08:20 PM

There is a good battle in STX brewing, and I think it will play out for a few years, at least. It could go either way - E36 or FT86...

The E36 is proven, has massive aftermarket support, and has what I feel is the best balance between power, weight, weight bias, and handling. It might be hard to dethrone the decades of experience in this chassis.

I've tracked and beat on several FR-S/BRZ cars, and they don't have much in the way of low end power. But they are lighter, and wide, and nimble. Also, they were at a disadvantage when it came to dampers - there just weren't many (any?) good shock choices for the BRZ/FR-S as there were for the E36.

But that is changing quickly. We installed the first properly shortened MCS single adjustable (TT1) coilover onto our BRZ above last week. These work at lowered "STX" ride heights, not the C Stock heights most of the MCS FT86 shocks have built for. We have remote reservoir doubles (RR2) coming from MCS for another BRZ next week. They can do internal doubles (TT2), too. These are real deal monotubes, not twin tubes like the Koni/KW stuff people have been using. As these higher end shocks make there way into STX builds expect to see the FT86 entrants going quicker.

Cheers,

Terry Fair

Splash · 08-07-2013, 09:00 PM

Now, if you could just get these monotube shock equipped cars to stop getting beat by twin-tube equipped ones...

ABQautoxer · 08-07-2013, 09:22 PM

Quote:

Originally Posted by Splash

Now, if you could just get these monotube shock equipped cars to stop getting beat by twin-tube equipped ones...

Simmons-Racing · 08-08-2013, 12:48 AM

You must be driving the Wrong BRZ, mine has Plenty of low end tq.

Simmons

dwx · 08-08-2013, 06:23 PM

The shocks MCS original sold had two different lengths, but they had requests to go lower by some road racing folks who wanted to lower the car a lot, over 2" and the old shock bodies were too long.

Most of the STX setups only lower the car maybe 3/4-1"... I own a set of the CS DA shocks and I've talked to Lex quite a bit about re-using them for STX and have determined I could without any real issues, apart from revalving them. He thought the bigger issue would be the threading of the shaft on top is smaller in length than the "non-stock" shafts and would be too short to use with camber plates, but after talking to vendors like GC, Raceseng, and Hotchkis, that's not an issue.

dwx · 08-12-2013, 01:46 PM

Saw Tomei released info on their Ti catbacks. They are great quality from my experience but I can't see using the straight pipe version with a header, it would just be extremely loud. The RHD exit one looks a lot like Simmons AL catback.

http://www.tomeipowered.com/BTE/inde...nium-mufflers/

CopperTopNWOR · 10-11-2013, 01:12 PM

OK, given that I will run the BRZ for the first time this weekend I felt I should ask now. Recommended pressures for 17x8 wheel with 245/40 Rivals on them. Just going to keep using the setup from my RTA WRX since the season is basically over. I was thinking 38/33 or so, but wanted some firmer data from those that have run the car.

08-08-2013, 06:23 PM	#123
dwx Scooby Guru Member#: 8343 Join Date: Jul 2001 Chapter/Region: MWSOC Location: Atlanta, GA Vehicle: 2005 2012 Jeep 2013 DGM BRZ	The shocks MCS original sold had two different lengths, but they had requests to go lower by some road racing folks who wanted to lower the car a lot, over 2" and the old shock bodies were too long. Most of the STX setups only lower the car maybe 3/4-1"... I own a set of the CS DA shocks and I've talked to Lex quite a bit about re-using them for STX and have determined I could without any real issues, apart from revalving them. He thought the bigger issue would be the threading of the shaft on top is smaller in length than the "non-stock" shafts and would be too short to use with camber plates, but after talking to vendors like GC, Raceseng, and Hotchkis, that's not an issue. Last edited by dwx; 08-11-2013 at 12:40 PM.

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02-05-2013, 09:00 PM	#102
dwx Scooby Guru Member#: 8343 Join Date: Jul 2001 Chapter/Region: MWSOC Location: Atlanta, GA Vehicle: 2005 2012 Jeep 2013 DGM BRZ	Saw robispec posted a pic of his brake setup, these were the rears: Apparently the 4-pot front and these rears drop 60 lbs of weight...

02-05-2013, 09:43 PM	#103
OrbitalEllipses Scooby Guru Member#: 178811 Join Date: Apr 2008 Chapter/Region: MAIC Location: MoCo Vehicle: 2011 White Corolla Over 400hp	Brakeman brakes. The rears eliminate the parking brake, that's why the dramatic decrease. If you take a look at a motorcycle rotor, they're that same general shape with cutouts and all.

06-11-2013, 08:54 PM	#104
Scooby South Subtly Outspoken Moderator Member#: 238 Join Date: Sep 1999 Chapter/Region: MWSOC Vehicle: OG05 STi 51E	Just wanted to update this thread. -The Twins seems to be a good fit in STX. Its been in the fight almost every event so far.. and has actually won a event or two. It also seems to help having an Alien Driver. -Fighting weight appears around 2575lbs with about 250lbs of weight reduction. -205 Hp to wheels appears to be where it is power wise with 150lbs of torque and thats on E85... expect about 190ish on a 93 tune. -headers, Exhaust and a tune appear to be a must to be competitive nationally. -245/255 tires seem to be split for performance. Dunlop, BFG, Hankook seem to be the favorites in Performance. -KW, Eibach, GC and Koni seem to be the suspensions of choice right now feel free to add anything for a general upgrade.. Bill

06-11-2013, 08:56 PM	#105
Scooby South Subtly Outspoken Moderator Member#: 238 Join Date: Sep 1999 Chapter/Region: MWSOC Vehicle: OG05 STi 51E	I was able to find about 7lbs weight reduction changing the front rotors to early model OE WRX Rotors.. which have less weight... about 3.5lbs a corner...

06-13-2013, 09:58 AM	#111
Scooby South Subtly Outspoken Moderator Member#: 238 Join Date: Sep 1999 Chapter/Region: MWSOC Vehicle: OG05 STi 51E	Eric.. 02-07 WRX rotors are the same size..just lighter.. they have less vains but everything else is the same.. markings and all. down to the 22mm stamp on them.. they have to be OE ..I have a set of CarQuest replacement rotors that are pretty standard and they ended up being heavier by 1.45 lbs ea..still lighter than the stock BRZ/FRS rotors.. but not as much as the 02-07 OEM rotors..02-13 WRX are the same size physically, but they went with heavier materials in 08.. the front Brakes is the 08 plus WRX braking system pretty much down to the ABS control unit, MC and Booster. Hope that helps clear that up.. Bill

06-14-2013, 01:53 PM	#113
Simmons-Racing Scooby Specialist Member#: 274179 Join Date: Feb 2011 Chapter/Region: Tri-State Location: Macungie, PA Vehicle: 2013 Subaru BRZ Blue	I got some rotors from my parts store, saved 6.7lbs and didn't cost much. What about the rear rotors? Simmons

06-15-2013, 11:41 AM	#114
Scooby South Subtly Outspoken Moderator Member#: 238 Join Date: Sep 1999 Chapter/Region: MWSOC Vehicle: OG05 STi 51E	^^^ haven't done any comparison on the rears... They are vented so the choices get slimmer.. 06-07 WRX and 08 plus WRX... they could interchange easily enough with other models..but havn't had a chance to. Unless you wanted to go with aluminum hatted ones that are mega-expensive. Bill

07-06-2013, 07:16 PM	#115
dwx Scooby Guru Member#: 8343 Join Date: Jul 2001 Chapter/Region: MWSOC Location: Atlanta, GA Vehicle: 2005 2012 Jeep 2013 DGM BRZ	Any reason why these wouldn't be legal for STX: http://www.racerxfabrication.com/fr-...rms/index.html They do make them with urethane bushings on the outside. Seems like the tubular arms would be a bit lighter than the stock cast ones and adjusting the camber via the upper arm seems like a better option than the lower arm. They also make lower arms with urethane bushings which would be STX legal and an alternative to the SPC ones.

07-06-2013, 07:20 PM	#116
silverhks Scooby Newbie Member#: 242402 Join Date: Mar 2010	The Urethane Ones Appear To Be Legal, But You Could Only Use Either The Upper Or Lower...

07-06-2013, 10:42 PM	#117
dwx Scooby Guru Member#: 8343 Join Date: Jul 2001 Chapter/Region: MWSOC Location: Atlanta, GA Vehicle: 2005 2012 Jeep 2013 DGM BRZ	Right, I know everyone always does the lowers but I think it's mainly because no one has ever made upper arms. Not that these are cheap, they are way more expensive than say SPC lower arms and I believe you need to supply your own bushings for the inner side. Whiteline does make some stiffer inner bushings.

08-07-2013, 08:20 PM	#119
Vorshlag Former Vendor Member#: 305763 Join Date: Jan 2012 Location: Plano, TX	There is a good battle in STX brewing, and I think it will play out for a few years, at least. It could go either way - E36 or FT86... The E36 is proven, has massive aftermarket support, and has what I feel is the best balance between power, weight, weight bias, and handling. It might be hard to dethrone the decades of experience in this chassis. I've tracked and beat on several FR-S/BRZ cars, and they don't have much in the way of low end power. But they are lighter, and wide, and nimble. Also, they were at a disadvantage when it came to dampers - there just weren't many (any?) good shock choices for the BRZ/FR-S as there were for the E36. But that is changing quickly. We installed the first properly shortened MCS single adjustable (TT1) coilover onto our BRZ above last week. These work at lowered "STX" ride heights, not the C Stock heights most of the MCS FT86 shocks have built for. We have remote reservoir doubles (RR2) coming from MCS for another BRZ next week. They can do internal doubles (TT2), too. These are real deal monotubes, not twin tubes like the Koni/KW stuff people have been using. As these higher end shocks make there way into STX builds expect to see the FT86 entrants going quicker. Cheers, Terry Fair

08-07-2013, 09:00 PM	#120
Splash Scooby Specialist Member#: 55936 Join Date: Feb 2004 Chapter/Region: MWSOC Location: Columbus, OH Vehicle: 04 WRX STi PSM	Now, if you could just get these monotube shock equipped cars to stop getting beat by twin-tube equipped ones...

08-08-2013, 12:48 AM	#122
Simmons-Racing Scooby Specialist Member#: 274179 Join Date: Feb 2011 Chapter/Region: Tri-State Location: Macungie, PA Vehicle: 2013 Subaru BRZ Blue	You must be driving the Wrong BRZ, mine has Plenty of low end tq. Simmons

08-12-2013, 01:46 PM	#124
dwx Scooby Guru Member#: 8343 Join Date: Jul 2001 Chapter/Region: MWSOC Location: Atlanta, GA Vehicle: 2005 2012 Jeep 2013 DGM BRZ	Saw Tomei released info on their Ti catbacks. They are great quality from my experience but I can't see using the straight pipe version with a header, it would just be extremely loud. The RHD exit one looks a lot like Simmons AL catback. http://www.tomeipowered.com/BTE/inde...nium-mufflers/

10-11-2013, 01:12 PM	#125
CopperTopNWOR Scooby Specialist Member#: 295724 Join Date: Sep 2011 Chapter/Region: MWSOC Location: NW Ohio Vehicle: 2022 WRX WRB	OK, given that I will run the BRZ for the first time this weekend I felt I should ask now. Recommended pressures for 17x8 wheel with 245/40 Rivals on them. Just going to keep using the setup from my RTA WRX since the season is basically over. I was thinking 38/33 or so, but wanted some firmer data from those that have run the car.