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I was never able to get enough bite to lock up the fronts before EVER. then i put the ad22vf's on there and admittly my tires were about gone(but decent tred left) they locked up for a good 10 feet when i was showing them off to a friend. slight modulation and they came back just to get ultimate stoping you jab them hard, release a litte and get back into them (more like a pump). I cant threshold brake like dad can so i give a little hard punch then back off and give a little back. Dad bout damn put me though the window the night i put them on. given all is equal, good tires, well bled system, good shape lines, equal pad, clean rotors, if you stop with the stock ones, then put on the ad22vf's and bring them to exact same they will stop shorter. period.
more swept area. while they have a broader pad which does equal to less pressure on rotor the over all friction area is increased. your brakes are designed to do ONE thing. convert rotional energy into heat. by the law of conversation of energy, energy can not be created nor lost. so that forward kinetic energy has to be turned into something. the rotional energy is where you get the forward motion. so stop you have to transfer that energy away, and the best way is to turn it into heat. the pads rub on the rotors to take the rotional energy and turn it into heat. the rotor is designed to be a big heat sink. it takes the heat and then disapates it away though the cooling fins and just radiation mostly. so the more contact area you have the more friction you can create which means more converstion of rotional energy to heat.
heres a way to show you this. take your finger and press on your palm and rub your palm back and forth. you can create alot of pressure on one point but it takes a lot of pressure to get your hand warm. now open your hand and rub your plams together. notice less pressure but you get the same if not more heat in your hand. and its also harder to move your hands. this is the difference in the size of the pads. with the smaller pads you get probaly a tighter clamping force but the over all heat is less. with a larger swept area you create more heat with the same amount of pressure. now you gota walk a fine line at which you are applying the maximum ammount of pressure you can before you break out of the traction circle and your tires cannot grip because there is more weight than they can handle at that pressure level at which point the will begin to slide instead of transfering the energy to the ground in the form of heat caused by friction.
the ad22vf's will allow you to stop shorter if all else is equal. but only marginaly shorter. like when i got these new tires, damn i stop on a dime. but you will notice is because you are used to a set level you push on your break. right after you get them installed for about a couple weeks you will still be in the habit of the old brakes. when coming up to a stop sign you will find yourself having to let off the brake and coast up then stop. cause your car is transfering the energy faster and more effeciently. but dont expect instant on off brakes. i was. the way everyone talked about them i thought it was going to be like a video game or something. but i did over all a quicker stoping car.
and this effecincy thing also goes into the fact that with the larger swept area you can transfer the heat away quicker. the heat has more surface area to radiate off of. and they are thicker so they can take more heat before they become totaly hot and start to warp. if you turn the stock rotors you are running a higher chance of warping the rotors so that was my deciding factor. these will last longer and give me a margin of saftey on the ability to stop.
as for those prices, check courtsey i could have been wrong but from what i remember they were the cheapest place to get rotors almost, got mine from jez when he worked at nissan. the calps are another story i would just call the shops around your place. but since you are ordering stock oem nx2000 rotors you get a discount from courtsey if you are on the list. which helps so ask for a set of rotors for a 92 nx2000 without abs if i remember correctly
now dont get me into cross-drilling(*coughcrapcough* and sloted)
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