AP Racing brake systems in development - Page 33 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Hanakuso · 12-06-2012, 03:32 PM

Anyone using or thinking of installing titanium shims? Just been looking around and it seems to help but not really required. If there is no negatives and only positive effects, I see why not right? Hardbrakes.com makes them specifically in the shape for the CP8350 caliper.

http://hardbrakes.com/index.php?main...roducts_id=122

Sample pic

OrbitalEllipses · 12-06-2012, 03:44 PM

Quote:

Originally Posted by Hanakuso

Got mine installed. Thank you Jeff for helping me out with the issue I had! Btw, I noticed a clicking sound (Sounds like putting a card in the spoke of a bicycle) and I narrowed it down to the contact between the pad and rotors. Is this normal? I'm thinking its coming from the J-hooks. I did notice Hawk HPS pads have 1-2mm more depth then the C300 so it's constantly making contact to the rotors. Maybe that's why it's clicking but I'm not 100%

Edit: Btw I checked the clearance with the OEM spare tire and it fits with a 20mm spacer. I'll double check later to make sure clearance is good enough.

In the case of a front tire blowout/flat, put the spare on the rear and move the functional rear wheel to the front so you don't need a spacer; common thing done on WRX's with Brembo swaps that didn't buy an STI spare tire.

From what I understand about these calipers the pad should always be contacting the rotor due to the anti-knockback springs (IIRC this system does use the springs).

Dave-ROR · 12-06-2012, 03:47 PM

I'm not a fan of mismatched tires on an LSD axle...

Hanakuso · 12-06-2012, 03:50 PM

Quote:

Originally Posted by OrbitalEllipses

In the case of a front tire blowout/flat, put the spare on the rear and move the functional rear wheel to the front so you don't need a spacer; common thing done on WRX's with Brembo swaps that didn't buy an STI spare tire.

From what I understand about these calipers the pad should always be contacting the rotor due to the anti-knockback springs (IIRC this system does use the springs).

Like what Dave said, I would never want different sized tire/wheel on the rear. The only other solution if you don't have wheel spacers would be to carry 2 spare tires so that if the fronts needed replacing then at least the rears would have even skinny spares. My plan was using the OEM wheel with spacer but if the spare tire works then it's more trunk space.

About the noise, it's probably normal and another member mentioned he has the same clicking. It's been getting a tad quieter in the 50-100 miles i've driven since it's been installed.

OrbitalEllipses · 12-06-2012, 04:06 PM

Quote:

Originally Posted by Dave-ROR

I'm not a fan of mismatched tires on an LSD axle...

Quote:

Originally Posted by Hanakuso

Like what Dave said, I would never want different sized tire/wheel on the rear. The only other solution if you don't have wheel spacers would be to carry 2 spare tires so that if the fronts needed replacing then at least the rears would have even skinny spares. My plan was using the OEM wheel with spacer but if the spare tire works then it's more trunk space.

About the noise, it's probably normal and another member mentioned he has the same clicking. It's been getting a tad quieter in the 50-100 miles i've driven since it's been installed.

All the tire calcs I know only go to 145 tread width and I believe our spares are T135/80/D16. The spare tire diameter should be close to the stock tire diameter...and as long as you're within 2/32" diameter, there shouldn't be a problem with blowing up the diff? I don't see a way to get this done without spacers unless you have a full size spare or change the temporary spare to something that matches your current tire diameter.

Dave-ROR · 12-06-2012, 04:35 PM

Quote:

Originally Posted by OrbitalEllipses

All the tire calcs I know only go to 145 tread width and I believe our spares are T135/80/D16. The spare tire diameter should be close to the stock tire diameter...and as long as you're within 2/32" diameter, there shouldn't be a problem with blowing up the diff? I don't see a way to get this done without spacers unless you have a full size spare or change the temporary spare to something that matches your current tire diameter.

Most of us are probably not running OEM diameter tires either

so depending on size that could be quite a bit off

JRitt · 12-06-2012, 04:41 PM

Attention all Competition Kit owners...just wanted to let you know that you are in good/serious company! One of our other customers stopped by our booth at IMIS today to talk brakes.

I'll give you a hint...he drives this:

OrbitalEllipses · 12-06-2012, 05:32 PM

Quote:

Originally Posted by Dave-ROR

Most of us are probably not running OEM diameter tires either

so depending on size that could be quite a bit off

And most people should be using tires that are within 3% diameter of stock (24.6x IIRC) in order to retain proper speedo readout.

CSG Mike · 12-06-2012, 05:48 PM

Quote:

Originally Posted by OrbitalEllipses

In the case of a front tire blowout/flat, put the spare on the rear and move the functional rear wheel to the front so you don't need a spacer; common thing done on WRX's with Brembo swaps that didn't buy an STI spare tire.

From what I understand about these calipers the pad should always be contacting the rotor due to the anti-knockback springs (IIRC this system does use the springs).

That's not good for the LSD...

robispec · 12-06-2012, 06:37 PM

Torsten/quaife type is completely unaffected buy this diameter difference...one of the pluses of the design.

OrbitalEllipses · 12-06-2012, 06:47 PM

Quote:

Originally Posted by CSG Mike

That's not good for the LSD...

3 people don't need to say it. See my reasoning several posts up, please.

CSG Mike · 12-06-2012, 07:08 PM

Quote:

Originally Posted by robispec

Torsten/quaife type is completely unaffected buy this diameter difference...one of the pluses of the design.

I know of a few cars with factory Torsens that recommend against it to avoid damage to the LSD... although in all reality, it should be the same.

Hanakuso · 12-07-2012, 01:25 PM

Well I ended up emailing the guys at hardbrakes about the titanium shims for the Essex kit and they can do a GB discount. If we have enough interest I could always create a new thread to make it more organized. This is what they had to say,

Quote:

We'd be happy to set up a group buy. For 5+ buyers we can do a 10% discount, for 10+ buyers we can do a 20% discount. In order to make this work with our ordering system, we'd need to put a fixed time window on the sign up process (no more than 30 days). Let me know if there is interest and we can set up details.

http://hardbrakes.com/index.php?main...roducts_id=122

If someone else can chime in and mention there opinions on these shims that would be great. It seems the only real negative effect would be the small weight added and money spent, but everything else seems great about them

King Tut · 12-07-2012, 02:52 PM

Quote:

Originally Posted by JRitt

Attention all Competition Kit owners...just wanted to let you know that you are in good/serious company! One of our other customers stopped by our booth at IMIS today to talk brakes.

Ask him his thoughts on turn 1 at Road Atlanta with regards to brakes.

12-06-2012, 03:47 PM	#451
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	I'm not a fan of mismatched tires on an LSD axle... __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

12-06-2012, 04:41 PM	#455
JRitt Join Date: Feb 2012 Drives: 2012 BRZ Premium WRB 6MT Location: Charlotte NC Posts: 726 Thanks: 230 Thanked 1,423 Times in 381 Posts Mentioned: 81 Post(s) Tagged: 3 Thread(s)	Attention all Competition Kit owners...just wanted to let you know that you are in good/serious company! One of our other customers stopped by our booth at IMIS today to talk brakes. I'll give you a hint...he drives this: __________________ Essex Parts Services- AP Racing / Ferodo / Spiegler / Versodeck Jeff Ritter\|Mgr.- High Performance Division www.essexparts.com

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12-06-2012, 03:32 PM	#449
Hanakuso Senior Member Join Date: Apr 2012 Drives: FR-S Location: California Posts: 1,956 Thanks: 294 Thanked 673 Times in 390 Posts Mentioned: 11 Post(s) Tagged: 2 Thread(s)	Anyone using or thinking of installing titanium shims? Just been looking around and it seems to help but not really required. If there is no negatives and only positive effects, I see why not right? Hardbrakes.com makes them specifically in the shape for the CP8350 caliper. http://hardbrakes.com/index.php?main...roducts_id=122 Sample pic

12-06-2012, 06:37 PM	#458
robispec Senior Member Join Date: Oct 2012 Drives: Black frs project Location: Socal Posts: 960 Thanks: 189 Thanked 886 Times in 381 Posts Mentioned: 190 Post(s) Tagged: 1 Thread(s)	Torsten/quaife type is completely unaffected buy this diameter difference...one of the pluses of the design.

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