10-16-2021, 04:52 AM | #1 |
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2NH to Blue downgrade (or options)
Hey everyone, I'll just skip to the facts.
Have M2C with 2NH option and have a semi decent offer for someone who wants the 2NH brakes and willing to trade in his blue ones. I've been debating going down to 18's for a while now and am weighing the options since the 19" tire options are quite a bit more expensive and the weight savings are attractive too + the option to run AR1 in 295 is very tempting too. I've tried searching a bit but can't really get a definitive answer so the question I'm really asking is: With the blue brakes, some 2piece discs and decent pads (ds1.11 or 3.12 or similar), proper fluid and brake lines - will the blue calipers survive 20-30 min sessions on track or is it a gigantic downgrade and I should be looking at alternative options for calipers of we decide to go down to 18's? Thanks! |
10-18-2021, 02:50 AM | #2 | |
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Sell you 2NH and buy AP Racing 5000 Pro set Anyway there might be an option of 380x36 rotors front with different caliper brackets for 2NH with Apex 18" wheels.. I have a set od 380x36 and different brackets, tried 513m and 763m in GT4 spec, but there was almost no space between caliper and the rim. But heard Apex has more space for calipers than BMW wheels. (have that set in a box with cracked rotor, can sell it for some normal money and you would buy just new rotors for that center bells)
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10-18-2021, 02:51 AM | #3 |
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depends how much you track... personally id sell him the 2Nh and get a set of AP racing...
i went from 2NH and 19 inch rims to gutting it all out and going AP Racing and 18 inch rims the blue ones wont cut it on track regardless of what you put on it.. unless you're a casual then sure it will do the job sorta.. 30 minute sessions no chance.. you're beating on the OEM brakes now.. you're rotors will cook here is my OG gutted that sucker out and put in a set of these and 18s |
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10-20-2021, 07:59 AM | #5 |
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On my slightly lightened OG (3370lbs with a full tank) and stock power, I haven't had issues on track with the blue brakes running 20-30 min sessions and a cool down lap. Yes, they change color and the dust boots crack after a few track days, but they work fine with a good fluid (SRF) and track pads (Pagid RS29 or Ferodo DS3.12). Dust boots are easy to DIY and I am trying the StopTech silicone boots to see if they last longer.
Your Comp is quite a bit heavier 3600 or 3650 (if DCT) and has a bit more power. Your experience would vary. If I were you, I'd either run 19s or do the smaller rotor with the right carrier to move the caliper in and find the right wheels; or get a AP or StopTech ST60 kit. |
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10-20-2021, 06:38 PM | #6 |
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If the blue ones are coming to you as trade, then go ahead and try them. Especially with a good 2 piece rotor/hat, they are plenty of brake, especially as you get better. Lots of OG M2's doing just fine with them (not that we don't all lust after those AP's). Then if you don't like it you can go for the big $$ solutions.
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10-20-2021, 09:15 PM | #7 | |
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10-20-2021, 09:27 PM | #8 | |
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However, I do agree that a smaller, lighter BBK like the AP Racing is the better option if you're a track rat. |
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10-21-2021, 06:49 AM | #9 | |
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And IIRC, the OP isn't just trading, he's selling the 2NH, which is probably the perfect solution. |
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10-21-2021, 10:26 AM | #10 |
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I have compared my brake graph with my buddy blue brake, and the delta is around 1s per lap caused by brake difference (similar tires). If you don't care about the superior brake performance and better heat management (way bigger pads and rotors), swap to blue.
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10-21-2021, 11:08 AM | #11 | |
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Is that your understanding, or am I missing something? |
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10-21-2021, 04:14 PM | #12 |
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Let me just clear the situation up...
I'm being offered ~2900$ + blue brakes that need new discs and pads pretty soon for my 2NH set. I think I'll just go for it and see if the blue brakes become a problem. I absolutely want to run 18's just for the AR1 that I can get dirt cheap here ... And I mean dirt cheap (like 800$ for a set of 265F/295R) so I'm dead seat on 18's anyway... Just trying to figure out in advance should I already start planning an AP kit or not. |
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10-21-2021, 06:10 PM | #13 | |
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Agree with your assessment of the blue brakes, good fluid/pads (I use RSL29) plus I've removed the dust shields (but kept a small part of the bottom to protect ball joints from radiating heat) & have GT3 air scoops, mine last 20min sessions going pretty hard on RE71RS/A052. |
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10-21-2021, 07:44 PM | #15 |
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Not sure about how specific the design was. Other than the material the pistons are made of, I think these are exactly what they use for the CCB. So I'm thinking they were engineered specific to those, and just borrowed over for 2NH use (pure conjecture here). I've not seen any data on brake torque, but usually that is not the key issue on track - anything that can lock the wheel has enough; with those huge pads and rotors, I'd say it is certainly capable of some insane torque, but that is mostly overkill. The better a driver is, the less they use brakes, and the OG M2s are really plenty with the right pads, especially with a better rotor. The 2NH will certainly eat up more heat in short spurts, with all the extra mass, but I'd expect fade would depend more on pad choice and how you use them. Not trying to say blues are better, just that OP might want to try them out before dropping 10k on APs. Personally I do like the 2NH, no doubt, but I know how much of a difference it can make losing more than 10# per wheel in unsprung/rotating mass, perhaps more like 15-20 with 18" wheels/tires factored in (ouch, my wallet just flinched).
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10-21-2021, 09:12 PM | #16 | |
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10-21-2021, 10:51 PM | #17 | |
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its track dependent and speeds you get... also know.... better brakes allows you to brake later and being allowed to brake later ultimately results in better lap times. theres a lot of variables ... but as someone who tracks a hell of a lot... i can exceed the limits of the blue brakes very quickly Last edited by Robbyjai; 10-22-2021 at 12:11 AM.. |
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10-22-2021, 01:23 AM | #18 | |
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Paired with EBC floating discs or Giro discs, some good brake pads (Endless ME22 for example), braided brake lines and good brake fluid it will work for sure (and ideal also brake cooling). If they will hold by your taste, you can later paint them to whatever color that wont be changing in track use. If they will be shit for your use, you can sell them and probably not loosing too much on it.
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10-23-2021, 05:07 AM | #20 | |
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10-23-2021, 08:06 AM | #21 |
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10-23-2021, 11:13 AM | #22 | |
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