|
|
|
Post Reply |
|
Thread Tools | Search this Thread |
02-18-2009, 12:53 AM | #1 |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
Performance Friction dropped a skid at our place today...
The good stuff is finally here! I dropped off my car for measurement last summer for a few weeks and after the madness of Daytona is over, we finally get what we have been waiting for! This is the 4-wheel kit, Z31 monobloc calipers (CNC machined from a solid forging, not a casting - only one in the industry), 372mm front/371mm rear (hmmm....). Our requirement wasn't that they fit under 18" wheels, but I am thinking they will - more to come on test fiemtents. For now, the stars of the show:
Z31 Caliper - 5 pounds of forged aluminum goodness, but the velvet bag alone is worth the ticket price! Almost. The powdercoating hides the cool machined (again, not cast...) features, but necessary to pass a true OEM-spec salt-spray test. A look through the bridge. Note the piston caps that reduce heat transfer and insulate from noise - versus the normal direct piston/pad contact of other calipers. A car's worth of pads - 16 of 'em. Each caliper uses 4 pads for more bite and torque. Does it work? Several race sanctioning bodies specifically limit the number of pads per caliper because of them, so results say yes... Note the FEA-designed moulded chamfer on the pad edge, specifically designed for noise and performance, not cut into the pad after pressing with a saw. Also, on these pads the design is assymetrical, meaning pads are directional and again, the result shows that the extra bit of engineering is worth it. Rotors - Direct Drive V2 - debuted in Cup last year, we got them on the World Challenge cars middle of 2008 season. The design saves 0.5 pounds per corner over the V1 PFC bobbin mount. Oh - and these are both cast AND machined in the USA, not in Asia. Note the machined surfaces all around the rotor. Machining rotor faces are standard, and some machine the OD. Also machined for trueness and thermal balance is the ID of the friction surface, as well as both the ID and OD of the vein surface... And the 372/371 rotor size - specific for creating the balance needed since you can't just swap around piston sizes with the ABS system used in the car and get the balance you want. Would certainly have been easier to make both the same size, but as frustrating as it is at times for us, PFC has razor-sharp vision of what they want and they don't compromise in the least for ease of implementation - part of my 6 month wait for kit design. Will test on track in a week and a half. If we get REALLY motivated, we may try to do a back to back test, but I am not sure I have the help that weekend to have an accurate test. |
02-18-2009, 01:16 AM | #2 |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
One more for the night... Here is that caliper in race trim, without the powdercoating - machining is much more evident and technically cool I think, but I have had brakes get hit with even limited winter driving and be a mess.
|
Appreciate
0
|
02-18-2009, 08:23 AM | #5 |
Veni Vidi Vici
89
Rep 2,750
Posts
Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA
iTrader: (0)
Garage List 2011 e90 M3-Sold [8.50]
2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00] |
Weight savings over stock?
|
Appreciate
0
|
02-18-2009, 08:53 AM | #6 |
Major General
531
Rep 5,483
Posts |
How muchhh?
__________________
Current:
2019 BMW X5 40i - Carbon Black/Tartufo Individual Leather 2020 Range Rover HSE - Black/Black 2020 Audi R8 V10 Performance Spyder 6MT - Ascari Blue/Black |
Appreciate
0
|
02-18-2009, 09:24 AM | #7 |
Veni Vidi Vici
89
Rep 2,750
Posts
Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA
iTrader: (0)
Garage List 2011 e90 M3-Sold [8.50]
2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00] |
|
Appreciate
0
|
02-18-2009, 09:36 AM | #8 |
Lieutenant Colonel
207
Rep 1,864
Posts
Drives: F80 M3
Join Date: Jun 2007
Location: Texas
iTrader: (2)
Garage List 2016 Porsche GT4 [0.00]
1999 Porsche Spec B ... [0.00] 2014 Ram 1500 Laram ... [0.00] 2007 Porsche GT3 RS [10.00] 2013 Tesla Model S 85 [0.00] |
$8K is a choker but very nice kit, wish they weren't painted but completely understand why they are.
|
Appreciate
0
|
02-18-2009, 09:42 AM | #9 |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
|
Appreciate
0
|
02-18-2009, 09:43 AM | #10 | |
Major General
382
Rep 8,033
Posts |
Quote:
http://bmwfans.info/original/E92/Cou...4/ill-34_1618/ I would assume the rotors weight close to stock to maintain thermal mass. It sounds like you are saying the hats save 0.5 lb, but the pads seem larger, so maybe the total weight savings is around 2-3lbs per corner? Thanks for sharing info on this setup.
__________________
|
|
Appreciate
0
|
02-18-2009, 10:15 AM | #12 | |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
Quote:
Rotor weight - also probably a bit less than stock. The 0.5# I referenced was weight savings between these rotors and a PFC Version 1 - both typically a bit lighter than stock. Will have the real numbers shortly. LOL - the exhaust note draws huge attention at the track - more so than the "exotics"... |
|
Appreciate
0
|
02-18-2009, 10:26 AM | #13 |
Lieutenant Colonel
181
Rep 1,783
Posts |
|
Appreciate
0
|
02-18-2009, 12:04 PM | #15 | |
Veni Vidi Vici
89
Rep 2,750
Posts
Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA
iTrader: (0)
Garage List 2011 e90 M3-Sold [8.50]
2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00] |
Quote:
Available in black or only red? |
|
Appreciate
0
|
02-18-2009, 12:23 PM | #16 |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
We order PFC in black only - I can custom order other colors if a customer is willing to wait. So the red here...I am guessing that that is what the owner wanted me to have so that is what I got...
|
Appreciate
0
|
02-18-2009, 12:47 PM | #17 |
Colonel
416
Rep 2,475
Posts |
Those look great James! Can't wait to check out your M3 at Road. Atlanta with the Moton installed!
__________________
2020 /// M2 Competition
Past: 2016 435i ZHP Edition | 2013 335i | 2011 135i | 2008 328i | 2006 325i |
Appreciate
0
|
02-18-2009, 01:24 PM | #18 |
Major General
382
Rep 8,033
Posts |
I am confused about this one. How do these PC calipers bolt onto suspension? Does the 5lb figure include brackets?
__________________
|
Appreciate
0
|
02-18-2009, 01:32 PM | #20 |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
Small aluminum brackets from BBKs are almost an order of magnitude lighter than the stock E92 M3 piece.
For a short-term answer, what is the total weight of all stock parts? Caliper, bracket, pads, rotors - or let me know what is excluded from the published weight. I will weigh a pile of parts on my end. Car loaded in trailer to get clearbra and a bumper touchup - looks like I will be tracking it more than originally planned... |
Appreciate
0
|
02-18-2009, 01:36 PM | #21 | |
Major General
382
Rep 8,033
Posts |
Quote:
http://www.m3post.com/forums/showthread.php?t=170932 Other weight savings items here: http://www.m3post.com/forums/showthr...ngs+benchmarks
__________________
|
|
Appreciate
0
|
02-18-2009, 02:41 PM | #22 |
Second Lieutenant
145
Rep 270
Posts
Drives: BMW 3
Join Date: May 2005
Location: Virginia
|
Hmm - enough variation in the two sets of measurements that I will probably do two complete piles of parts, on the same set of scales...
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|