Postby ray d saint » January 21st, 2015, 9:41 am
thanks again BS.
i jus found this on nissan forum...
1. To convert from drums to discs, you need new hubs from a B13 Sentra with rear discs, or from a N14 NX/Pulsar (91-93 in North America). Beware, the NX/Pulsar hubs have a different offset than the Sentra, depending on your wheels you may need spacers. 5 mm spacers are JUST enough, you may want to go for a little bit more. I do get some rubbing when the car is loaded with heavy junk, or simply when I'm riding a BIG speed bump.
2. If you are converting from drums to discs, you will also need new park brake cables. Just get the ones for any 4-wheel disc B13 Sentra. These are a bit nasty to get at, since the exhaust system heat shields are in the way and need to be removed for access to the bolts holding the cable clips onto the floorpan.
3. You will also need a new master cylinder. You need something big enough to apply enough pressure, and with the correct proportioning valves for rear discs. Depending which side of North America you are on, a compatible master cylinder will come from either a Maxima or Altima. Go to the local junkyard to see which of these cars has a master cylinder which looks EXACTLY like the one under your hood, as the other car will have something completely different. It seems the Maxima is a good match on the East Coast, but the Altima is the good match out West. The year doesn't really matter, just get something for 4-wheel disc with a bigger bore size that what's under your hood, it should do.
4. One thing you need to keep in mind is the proportioning valve, as there are 2 designs out there on the each of the Sentra, Maxima and Altima. Unless you want to do a plumbing job, stick with the design you have: either your proportioning valves are built into your master cylinder (4 brake lines leaving the cylinder), either they are separate (only 2 brake lines leaving the cylinder). Aftermarket support seems to only be available for proportioning valves that are separate.
5. The brake booster also needs to be upgraded to a more powerful unit. I didn't change mine because it's a PITA to get off. I can do most of my braking just fine, it's just for emergencies I run out of brake assist and end-up having manual brakes you need to literally STAND on to get more braking out of them.
6. Replacement rotors are available from the NX/Pulsar. Just ask for the bigger ones, those are the ones you need.
7. Replacement pads come from a 89-93 Maxima with rear discs, although I'm sure there's brake pads from the NX/Pulsar that would also fit. As far as I know, there were 2 different setups for rear discs on the NX/Pulsar, but only 1 rear disc setup on the Maxima, so to avoid getting the wrong pads, just get the ones from the Maxima.
I still have the smaller stock front calipers, and the car stops way better now with those rear discs. I don't really feel the need to upgrade the fronts anymore, but I just might get around to it. I'm happy with my brakes now.
thx
