Thread: B13 brake upgrade aficionados

Slotted rotors are good (I run them). They do their job well (evacuating gases), don't produce nearly the amount of stress cracks (none from my experience) and you loose only a tiny amount of metal from the rotor, compared to drilled holes so the rotors can do their main function (absorb heat). They don't provide any extra cooling (like holes are supposed to) if that's what you were getting at.

Slots are good.

Most of the reason I'm not busting out with the high technical explanation: it's late and I'm tired. I usually like to inform better, but I'm lazy right now. I almost just ignored you to begin with, or gave you the large caps with no info to back it up. I'm not tired enough to be that curt.

Haha well thanks for actually explaining anyway. In my defense, I had no clue about cars in 1996

Right, the gases from the braking (which I also forgot about ) Haha. Well damn I suck at this. From a heat transfer perspective though the slotted ones should at least cool them somewhat due to the extra area and airflow through them induced by the spinning rotor, no? Probably too small of a difference to matter though.

Altima MC has a larger center bore than the B13 one so it moves more fluid for any amount of pedal push to feed larger calipers or multi piston calipers.

Brent

Thanks Brent.

Dan/Ben good points. For a note, I have a corporate account through Napa and they list Brembo rotors for the NX, but I cant get a picture for them though. :/

I'll be out at the pick-n-pull tomorrow morning (although sleet is predicted) looking or the brake upgrade parts and a slew of other things that I need. Any other suggestions?

They are brembo blank rotors. That is what I run in my SE-R with NX brakes. They stop just fine for me. I noticed a little more of a pedal thrown with the NX brakes but they stop much better.

Current pads give of VERY minuscule amounts of gases, that is why drilled and slotted do next to nothing. Slotted can be beneficial if the slots are not cut to the outside edge of the rotor. They can help to clear dust and prevent taper on the pad. They really do nothing as far as cooling or increased braking/resistance to fade. This is of course different in RACING conditions as mentioned above. But for track/autox/street use, save the money, keep the mass!

This information is directly from a recent racing book of 200pages on nothing but brakes. I would reference it but I do not have it at school...


Blanks FTMFW!!!

Dudeman

Oh also, a common misconception I'll try and clear up.

A larger master cylinder is not technically "better" many assume that the larger the bore the "better" it will slow the car. Looking at fluid dynamics, the larger master cylinders, as mentioned above, simply move more fluid per inch of travel. They however will not exert the same amount of pressure that a smaller master cylinder would.

The ONLY need for a larger bore is to accommodate larger piston/fluid needs. That is most likely why with the NX brakes you notice a longer pedal travel, because it takes more travel to exert the same amount of force then your old setup.

Technically the smaller the master cylinder the better. Only go as large as you have to. There is of course the topic of how the MC's are valved..which is the reason the Altima is the best fit, because of rear bias. But I figured I would throw this in why we are going over basic braking parameters.

I would go into actual calculations/proof but I should be studying for a chemistry exam in 6 hrs .

It is really not that difficult if you draw out a diagram to scale and apply some simple physics...

Dudeman

Edit: Ugh got something backwards no time to fix rigt now

Ok guys, here goes this crap haha. From everything I can see, a smaller MC is always better because it always causes greater pressure in the brake lines. So why is it that people want to have a bigger MC? I'm honestly asking because I've never researched brakes before and now I'm more than confused. Here's my proof of concept (and I know I'm a nerd). If you can't read it I think you can go to the site and you can make it bigger and read it there. Anyway someone please tell me if I am missing something here. What I mean to say is that why would upgrading your calipers require a larger MC?

The reason you would need to upgrade the MC, is simple. Just imagine when you upgrade your brakes, you generally increase the piston diameter. This is true with the NX upgrade. Now in order to move that piston the same distance as say a half sized piston, it would require double the fluid. That is where the larger MC comes in. Most stock MC's do not move enough fluid in one pedal motion. So, you need a large MC, to move the extra fluid. What this translates into is longer pedal motion to create the same amount of braking force in the larger diameter piston.

That is why the smallest MC that will still work, is the most responsive and effective.

Make sense? I know it's not super technical but i'm burned out from 2 exams today...

Dudeman