|
|
|
Post Reply |
|
Thread Tools | Search this Thread |
06-15-2012, 12:36 AM | #1 |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
My Cantrell Motorsports Brake Duct Kit writeup (with BBK)
So I installed this kit today and figured I'd share my experience with it since I have a slightly different setup than stock. Some of you might be wondering why bother with brake ducting when I have a BBK already? Well my front pads are wearing extremely fast and I'm hoping a bit of cooling might preserve a bit more life in them. I also have the challenge gt3 diffuser which has brake ducting built in so why not make use of them.
Challenge GT3 diffuser with brake duct inlets in the front. Brakes and rotors off. Backing plate fitment is good. It requires 2 spacers between the provided bolts for the bottom 2 mounting points. As you can see, there's plenty of room for the BBK. Another view from above. You can see the 3 mounting points. Hose attached. The Cantrell kit is all 2.5" ducting and the Challenge diffuser happened to be 3". I was worried at first, but the hose fits snug enough on the inside of the diffuser duct so I just fed about 3" of hose into it without tying it down. It definitely won't come out with that bottom zip tie in place. You can also see some duct tape I put on parts of the hose where I thought it might rub. Just an extra precaution. Here's a shot with the wheel well back in. I had to cut a small part of it to fit around the hose. Brakes are back on. Here's a top view so you can see how close the backing plate is to the rotor. The air hits the inside center area of the rotor. A shot from the front under carriage so you can see where the diffuser ducting ends and the hose enters. Here's a view from under with the wheels on and pointing straight ahead. [b]And here's a view with the wheel at full lock. You can see the tire slightly rubbing on the hose. At just slightly less than full lock, it doesn't rub so I think as long as I pay attention it shouldn't be an issue at all. If I do rub too often, my first solution will be to flatten the hose a bit where it does rub. The hose is structured with some pretty strong metal wire so I can make part of the hose into more of an oval shape. Hopefully that will fix it. So does it work? I drove around town today with only one side setup and did a couple moderately hard stops as well as driving at around 45 mph. The rotor with the brake cooling was about 10-15 degrees cooler than the side without cooling. I checked the rotor temps on 2 occasions with an infrared temp gauge and the results were pretty much the same. I'm heading out to Laguna Seca again this Sunday so I'll be recording more relevant data. I recorded front rotor temps last month at the same track so I'll have hard numbers to compare. Stay tuned.
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
06-15-2012, 01:58 AM | #2 |
Lieutenant
38
Rep 530
Posts |
That's awesome!
__________________
KW V3's, Sparco Pro2000's, Vorshlag CP's, JB4, Heat Wrapped Raceland DP's, aFe stg. 2 Sealed Intake, Miro 111's, Hankook RS3's 225/245 (for now), Seibon M3 CF Hood, Turner Motorsports Alum. Radiator, Big Tom IC, BMW Performance bumper.
|
Appreciate
0
|
06-15-2012, 08:37 AM | #5 |
Bored at work....
890
Rep 5,388
Posts |
Thank you!!!
__________________
Grey Matter:2008 E92 M3:608/425. SG/PS SOLD!
Dark Matter:2015 F80 M3:495/505. SOLD! Anti Matter :2016 F82 M4 GTS What next?!? A 2022 M235i GC- I must be getting old |
Appreciate
0
|
06-15-2012, 08:59 AM | #6 |
BimmerPost Supporting Vendor
307
Rep 13,093
Posts
Drives: BPMsport 2012 E92 M3
Join Date: Jun 2011
Location: Kansas
iTrader: (45)
Garage List 2013 Nissan GTR [0.00]
2019 Sierra Denali ... [0.00] 1999 Nissan Silvia [0.00] 1999 Nissan Skyline ... [0.00] 1998 Toyota Supra [0.00] |
Very cool. Nicely done.
|
Appreciate
0
|
06-15-2012, 10:03 AM | #7 |
Major
59
Rep 1,250
Posts |
Cool, look forward to having some hard data after the track testing. How are you measuring rotor temps at the track? I assume temp paint, since lasers can't go 1000+f ?
|
Appreciate
0
|
06-15-2012, 11:31 AM | #9 |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
255/35/19 AD08's in the front. Keep in mind the sidewalls on these tires are very tall too.
My rotor temps stayed around 500 degrees fahrenheit at the last event. I'll probably cover up the brake cooling intake area for a session to get updated readings since data from the same day is probably better.
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
Appreciate
0
|
06-15-2012, 02:05 PM | #10 |
E46 + E90 + F80
192
Rep 2,894
Posts
Drives: E46 + E90 + F80
Join Date: Jul 2008
Location: Illinois
|
Great write up and photos!
__________________
F80 M3 DCT|Alpine White . Black Leather | My Build Thread
E90 M3 DCT|Melbourne Red . Speed Cloth | My Build Thread E46 M3 6MT|Jet Black . Black Nappa Leather | My Build Thread |
Appreciate
0
|
06-21-2012, 09:00 PM | #11 |
Captain
36
Rep 927
Posts |
Thanks for the write-up. Any update?
__________________
Craig Brickner
Click to Join: BMWCCA # 366493 |
Appreciate
0
|
06-21-2012, 11:24 PM | #12 |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
I recorded temps on Sunday, but I couldn't compare temps with my last event because air temp was about 20-25 degrees warmer this past Sunday. But my rotor temps were about the same so I guess that's a good thing considering air temp was a lot higher. I was going to cover up the brake ducts for a session to get a more accurate comparison, but I ended up having to change my front pads and then bed them in in the middle of the day. So I just gave up on testing and enjoyed the rest of the day. I'll be at Thunderhill in less than 2 weeks so I'll try to record temps with the brake ducts open and closed then.
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
Appreciate
0
|
06-22-2012, 12:09 PM | #14 | |
Major
59
Rep 1,250
Posts |
Quote:
Also, if the temps are the same as last event with no cooling but ambient temps are 20 degrees higher, that is not a good sign for the ducts. Ambient has little effect on rotor temps. Ambient has a major effect on tire temp because they only get to ~200, but since rotors get way way hotter than that the ambient being 20 deg off doesn't matter so much. |
|
Appreciate
0
|
06-22-2012, 12:25 PM | #15 | |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
Quote:
My rotors aren't glowing either. Those are just a very bright yellow caliper.
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
|
Appreciate
0
|
06-22-2012, 12:25 PM | #16 |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
Stock 359m wheels on the street.
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
Appreciate
0
|
06-22-2012, 12:30 PM | #17 | |
Major
59
Rep 1,250
Posts |
Quote:
Do you do a half cool down lap or so prior to seeing that temp? The reason I'm concerned is the ducts are probably functioning better than your numbers suggest. If one starts at 1100 and one starts at 1000 they may still reach 500 ish at around the same time. I don't mean to seem critical, your setup looks great! But I think it is lowering temps more than the data so far shows, as a result of excessive cooling before measuring. |
|
Appreciate
0
|
06-22-2012, 12:32 PM | #18 | |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
Quote:
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
|
Appreciate
0
|
03-07-2013, 11:09 AM | #19 |
Doc Rebel!
30
Rep 324
Posts |
I decided to re-visit this thread now that the next upgrade on my project is the AP racing BBK thats coming. Your pictures are amazing, and one of the most detailed I've seen. After walking around pit lane at a few racing events, I was beginning to notice the impressive size of some of the ducting people are using. Your post also gives a pretty good idea of what to expect with the install (Including wheel well cutting, which is not an issue). Again, a job well done
|
Appreciate
0
|
03-17-2013, 05:35 PM | #21 |
Apex Everything!
976
Rep 4,378
Posts
Drives: 2007 Honda S2000, 2017 GT350
Join Date: Sep 2008
Location: Cedar Park, TX
|
Nothing other than they seem to work, but aren't a necessity at all with a BBK. I do feel like they extended the life of my track pads, but no hard data here.
__________________
2011 E92 M3(Sold). 2007 Honda S2000 (Track Car). 2016 Cayman GT4 (Sold). 2017 Shelby GT350 (AKA Crowd Killer).
My pet project: https://stickershift.com |
Appreciate
0
|
03-19-2013, 08:58 PM | #22 |
Major
433
Rep 1,286
Posts |
I have this same brake duct system on stock rotors, calipers and track pads. This is one of these items that's difficult to draw a conclusion. Like the OP states, it's probably helpful but hard to know without back to back testing under the same conditions. I've never had brake fade at VIR so ducting kit made no difference there. I've had brake fade at Road Atlanta and I still get it with the brake duct kit. Do I go longer before fade starts? I don't know. Do my pads last longer? Not that I can tell. The one thing I can say with a fair degree of certainty is that once I have fade (not just a little but good rippin' fade) that the recovery back to usable brakes is quicker with the ducting kit. So hard to tell how much it helps without data, but it does help, though in the stock brake form, it's certainly no cure for fade on certain tracks were fade is an issue.
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|