AD18VB vs. AD18VE - Page 3

Aug 29th, 2003, 10:10 AM

Guys, a question, stupid and cheap one, will there any braking improvement by grooving the stock pads?

Red_Coupe · Aug 29th, 2003, 09:11 PM

ahhhh? prob. not.. you could go for some wagon frt. brakes
if you want more stopping power...

b12sr20de · Sep 10th, 2003, 09:03 PM

question...whats are the brakes of the 4 door b12 with the e13??

what rotors will fit the sr20 axles in a b12 thats good for 150 - 230bhp?

minute rice sentra · Sep 10th, 2003, 09:16 PM

Quote:

Originally posted by red_devil
hey does anybody know what the plug is on the side of the
booster?it has two wires yellow,and black is it a sensor?

brake fluid level sensor?

Myetball · Sep 10th, 2003, 11:01 PM

[quote]Originally posted by b12sr20de
question...whats are the brakes of the 4 door b12 with the e13?? [quote]

You should have the CL18B brakes with a solid rotor. Sufficient for a 69hp car.

Quote:

what rotors will fit the sr20 axles in a b12 thats good for 150 - 230bhp?

I'd say go with the AD18's with some performance pads, maybe even cross drilled and slotted. You could also do the AD22VF system from an NX2000 w/ABS for the ultimate stocker upgrade.

Of course if you are really serious you could go for something like this or another big brake or racing setup.

Myetball · Sep 18th, 2003, 06:29 PM

I think it's time to talk a little about proportioning and master cylinders. The whole idea behind proportioning is to meter the amount of fluid/pressure each wheel receives when the brake is applied. Proportioning is set by either an external valve, usually located on the fire wall, or an internal valve built into the master cylinder. Proportioning limits are set based on the type and size of brakes you have on your car. Naturally, disc brakes require much more fluid/pressure than drum brakes to work effectively.

When upgrading the brakes on your B11/B12 it's important to keep in mind the stock proportioning is set to effectively meter fluid/pressure to a set of small rear drum brakes with quite small cylinders and a set of medium sized front calipers. Swapping to an internally proportioned master cylinder designed to work with rear disc brakes or larger rear brakes from a larger chassis vehicle will result in too much fluid/pressure being sent to the rear cylinders. It may be fun for a while to have your rear wheels locking up all the time, as it would make for some pretty fun drifting, but it is hardly practicle and somewhat dangerous to have a daily driver with hair-trigger rear brakes. This is especially true when you upgrade the brake booster and increase the overall amount of pressure in the brake system.

So, what's the best combination? Well, IMO a B12 would stop quite well with a set of AD18 brakes up front with high quality pads, stock rear drums in the back with high quality shoes, a booster from a KN13 Pulsar SE, Stanza, or B13 SE-R, and a stock master cylinder.

The only real affect swapping the master cylinder will have is to change the proportioning so a master cylinder swap isn't really necessary unless you are going to fab some rear disc brakes. In this case it would be necessary to swap master cylinders to ensure the rear disc brakes receive enough fluid/pressure to work. Without changing the master cylinder, and along with it the proportioning, a set of custom rear brakes would only provide a fraction of their designed braking power.

Lazarus_023 · Sep 22nd, 2003, 11:10 PM

alright, i cornered the market on diesel hubs. now what?

the above info is all well and good, but it does squat fer my poor B11.

i noticed while shopping for pads that the sentra diesel and stanza (82-86) use the same pads. IIRC, they use similar calipers/rotors, with the stanza being slightly thicker (20mm vs 18, er something?) anyone know if i can use the MUCH more readily available stanza (or even maxima?) calipers/rotors in conjunction with the diesel hubs?

Myetball · Sep 28th, 2003, 01:36 PM

Here's an auction for some AD18VB/VE compatible rotors in case anyone is interested.

These won't work with calipers from an '87 Pulsar SE unless you get the torque members from a set of '88-'90 calipers.

Webfoot · Sep 28th, 2003, 04:12 PM

Quote:

Originally posted by Myetball
Here's an auction for some AD18VB/VE compatible rotors in case anyone is interested.

Gosh, wish they had a pic.
First off, mad props to your sticky, Myet.
Secondly, I wanna back up a little bit and confirm a few things. Went to the jy and picked up a set of Calipers and rotors

from an 87 Pulsar SE with a CA16DE The two big calipers are setting next to a b12 stock caliper. Now, I checked brakes on at least 20 pulsars and 30 B12's and saw basically these 2 types of brakes. The SE's have much thicker rotors with fluting between the 2 surfaces. Everything with a SOHC had identical, whimpy little brakes as the b12. So, I'm just saying that any pulsar, 87-90 with a CA motor should have AD18 brakes.
Another thing I noticed is the calipers in an SE-R are litterally stamped AD18.... The ones in all the CA motored Pulsars are all stamped 1708. Don't think you can see it in the pic, it's right next to the bleeder screw. There is also a 17V stamped on the caliper. Sooooo, Whadya think? I paid 10ea for like new rotors, 20 ea for good calipers with like new matalic pads.

Myetball · Sep 28th, 2003, 05:43 PM

Sounds like a sweet deal. Yep, the '87-'90 SE's have the AD18VB brakes. Check the first post on this thread, you can't see the part with the numbers but mine had the same numbering.

Just remember the '87 Pulsar SE's rotors are 10mm smaller in diameter than the '88-'90. If you try and mount up the '87 calipers on a set of the later year's rotors it won't fit. The only difference in the calipers in the '87 has a shorter torque member (the part that bolts to the steering knuckle) to match the smaller rotor.

The whimpy brakes on the XE Pulsars and Sentras are CL18B.

Webfoot · Sep 28th, 2003, 05:51 PM

????? THe 89 SE with 1.8 had the same setup. The rotors I got are the exact same diameter as stock, just thicker. You can also tell how much MORE of the rotor surface the AD brake pads use. Is that the 10mm your're thinking of?

Myetball · Sep 28th, 2003, 06:47 PM

Quote:

Originally posted by Lazarus_023
alright, i cornered the market on diesel hubs. now what?

the above info is all well and good, but it does squat fer my poor B11.

i noticed while shopping for pads that the sentra diesel and stanza (82-86) use the same pads. IIRC, they use similar calipers/rotors, with the stanza being slightly thicker (20mm vs 18, er something?) anyone know if i can use the MUCH more readily available stanza (or even maxima?) calipers/rotors in conjunction with the diesel hubs?

Lazarus, I really don't know if it will work. The steering knuckles on the Stanza and Maxima are larger than the sentra so I don't know if the caliper mounting will work.

----------------------------------------------------------------------------------

Webfoot, I'll assume you got rotors to fit an '87 Pulsar SE. The ones for the later years will be 10mm larger in diameter.

I was checking my Mitchell CD and it says the B12 wagon used AD18VB calipers too. Anyone ever look into that?

Webfoot · Sep 28th, 2003, 10:40 PM

Damnit, now I got to go back the jy to prove you right. Cuz I swear the 89SE had the zact same brakes as the 87. What if it was a late 87?

Myetball · Sep 28th, 2003, 11:20 PM

Well, they look exactly the same and it will look like the '87 calipers will fit the '89 rotors until you go to put them on and the holes don't quite line up.

If you can get the torque members off an '88 or later it should solve the problem. Just bolt them up to the calipers you have. The calipers are the same...just the torque member is different.

I believe the size difference was related to having a CA16DE vs. the CA18DE.

Webfoot · Sep 30th, 2003, 11:24 AM

F*&^ it. Do you think there's much diff in the performance? The set I got has all the appearances of a fresh rebuild. The 1 CA18 in the yard only has 1 brake assy left. Hmmm, I just measured the rotor sufaces. Stock b12 pad covers 1.4", KN13 1.5" as measured from the inside to the outer edge..... So, but the pads are the same on both CA setups? Just bigger rotors and torque member.