Wilwood 6-piston on 330mm Cayenne Rotors

Sent the first CNC'd set to Tim for testing. These are for LATE 951 spindles with 94mm spindle/caliper bolt centers.
While it's fresh on my mind, these use the factory spindle/caliper M12x 1.5 bolts and you'll need 4ea 7/16-14 x 2.50" bolts with short shoulders (less than 1" under head)....

Thanks Rob, can't wait to try out the new brakes this weekend.  I'll get some pics as well as give my opinion early next week.

These brakes will be paired with normal turbo rears. According to wilwood, 3/4 MCs on both ends should work well.

Those are massive. I can't believe you got those that cheap.  They look like they came off of a nascar.

And now I see how you got them. I am very interested in seeing how those work out. That would be a kick ass setup.

good fruit, better buckle in

That photo makes them look big!  There are very close in size to TurboS front calipers.  The wilwoods are thinner but wider, which allows them to use such wide pads.  Below is a pic of them mocked up on my car with 330 mm Cayenne rotors (Stoptech).


Compare with TurboS

Did you get your dual mc's re-shielded so you can factor those out in overheating. They could also use a front shield as well although the majority of heat comes from the side header.

I'm going to wrap the MCs in fiber blanket   

Yeah just like the Reynolds a390 crapasil in the 944/928 blocks, the Porsche caliper's cast alloys heat cycle to distortion where the pistons gaul and start locking up. Rebuilding them is a neccesary and painful ritual that results in yet the same crappy caliper.

xschop wrote:Yeah just like the Reynolds a390 crapasil in the 944/928 blocks, the Porsche caliper's cast alloys heat cycle to distortion where the pistons gaul and start locking up. Rebuilding them is a neccesary and painful ritual that results in yet the same crappy caliper.

Quit being so hard on the Porsche parts, I need to sell them   

Sorry, there's always Rennlist to fall back on where everything with a Porsche sticker is gold.  

Tim, what wheels are you running? I see you have spacers there. Those Integras can fit under 993 16" wheels with 10mm spacers and 322mm GTS rotors. Problem is the GTS rotors have the gold Porsche sticker and $400-500 /set.  Don't forget the Cayenne centering rings have a 1-sided I.D. chamfer that faces towards the hub.

17" cups. My mock up suggests that they will work without spacers on those wheels, but will not work without spacers my BBS 10 spoke wheels. I run the spacers to equalize my front and back track width.

Rob,
What material are you using for the adapters?

7075-T6
The locating spuds are incorporated into the base unlike the original ones I made for a local guy.

Soooooo.... Are they on the car? How are they doing? I can't see how they wouldn't be a good caliper. XSHOP... How much did you want for a set of the adapters?

Last time I heard from him this summer, he was happy with them. Im not a track junkie, but considering he went thru two different sets of caliper upgrades and said they were much better than the Blacks and Reds at getting rid of the heat and not fading, I got myself a set too.

I was planning on adapting them to the stronger 87NA spindles, but Tim asked so I started these first (951 spindles).... These require wasting more of the stock material to build. Im making a few more sets and will probably price them at $250 shipped US-48 with the required Cayenne centering rings. The local guy Scott says the ATE brand Cayenne rotors are the best for the track. I got a set of those too for myself. 

Don't forget I designed the rear matching Wilwood radial Dynapro adapters. Ill be making a batch of those next....

https://944hybrids.forumotion.com/t1595-wilwood-rear-300mm-kit?highlight=wilwood

zeusrotty wrote:Soooooo.... Are they on the car? How are they doing?  I can't see how they wouldn't be a good caliper.  XSHOP... How much did you want for a set of the adapters?

Waiting for FEDEX to arrive to mount them, then the car goes on the trailer and to Barber Motorsports for a weekend testing.

xschop wrote: The local guy Scott says the ATE brand Cayenne rotors are the best for the track. I got a set of those too for myself. 

Do you know if he tried the Stoptech Powerslots? They are only $5 more/rotor, that's what I went with.

No, he was running GTS rotors and Big Black pads and they were eating up his budget. The 911 track guys are using the Cayenne rotors too cause they last and are less than the GT3 stuff.

Kind of a cluster this weekend, not with the brakes but with teaching the beginner DE classroom, giving check rides, and misc, it did not leave me with much room for testing.

Saturday was 40 and raining, not really the weather that one wants to test a new brake setup on the track. So instead of heading for the track, I went up to upper paddock to bed in brakes (new rotors and pads), as well as to set the front/rear balance. Once bedding was achieved and they brakes cooled, I was able to effectively balance the car using my DMC setup.

Sunday. I was done with my classroom teaching at 11am, so the plan was to test the brakes on track at 1pm. I usually like to go out and run with my group 1 students to see how they are doing, so thought I would kill two birds with one stone. On the out lap, the brakes felt really good, but of course they were cold and I was not pushing it (air temp we 37oF and cloudy, but dry). Coming on to the front straight the rear end of the car lurched hard to the right, I assumed that something broke and quickly realized that my right rear tire was flat    Unfortunately, I did not take any spare wheels and tires to the track with me, so my day was done   

Some further information. I did go up one size on my front master cylinder, so I am running 3/4 F, 3/4 rear masters (regular turbo calipers in rear). I was able to get good balance after adjusting the DMC. The limited stops I was able to perform were impressive and I'm anxious to see what they will do at speed.

Rob's caliper adapters and centering rings fit perfectly, Thanks Rob!

Tim -
What pads are your running in the Wilwoods and how do they compare for price to the black's pad offerings? I'm currently enjoying the performance friction pads now, but don't know the wilwood selection

Right now I've got a set of Wilwood Polymatrix A's installed. They are very aggressive, inline the DTC 70/60's. Here are some pad exchange numbers for the integra's

Pad interchange: Wilwood 9828; PFC 7775, Hawk 221, Raybestos R561.28


The new pads are $100 more than for the Turbo S pads but are twice the thickness. Also, lot's of pads available on Ebay for less then $100 from the NASCAR teams.

Over the weekend I designed another adapter that mounts these Integras to a GTS (322x32) rotor. It is a beefier adapter and NO centering rings needed. So they'll be $175 shipped US-48 priority.

Thanks to Tim for doing the test mock-up for these. I hope to get the new material today and start machining adapters this weekend for the Cayenne rotors that are more than double the strength. 

Check ebay for these.They must be the Integra 6R's (180mm radial mount), not the Lug (axial)mount Integras. I just bought another set a few wks ago... gotta love BIN  

http://wilwood.com/Calipers/CaliperProd.aspx?itemno=120-5690-FS

Ok. I have 1 last set of these until a couple weeks when I can make a larger run of them. These are redone from 6061 T6 with 3x the material around the bolt-thrus and can take over 1000 deg. according to ASTM. I'm leaving the extra material (0.250" at the bottom) so I can redrill them on-the-fly to fit the 87-up NA spindles which are less expensive and more common..... Again, Thanks, to Tim for the mock-up.