Yep, as the title says, Matt and I have finished the REAR BBK on my car. It is absolutely awesome. Here's the announcement over on the Org and my 200 mile review below the link.
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OK. I'm the test mule for the Matt's front, and now the rear brake kits. I've got almost 200 miles on the rear brakes at this point, so its time for me to chime in with my observations.
After the pics above were taken and before we road tested the car, we powdercoated the rear rotors black to make them match the fronts. We made the mistake of getting some powder on the wear surface. This on top of the zinc plating was a mistake. It took about 100 miles to wear it off. Once it was gone, the pedal feel changed for the better. I also have stainless brakes lines front and rear now. As Matt mentioned, I have Valvoline synthetic brake fluid.
Compared to having the 300ZX front calipers and stock rears: brake pedal travel is about 1/2 cm more now before brake engagement-VERY minor. The pedal is firmer. The sponginess we encountered on the initial drive is gone - I believe when the powder coat and the zinc plating was off the pad surface this issue went away. I do not feel a master cylinder change is necessary. Under normal, average, conservative driving conditions (ie, not trying to throw passengers out the windshield) the brakes behave comparable to the stock system. When you push the pedal harder, you better be holding on. On a 50mph to zero demo for my 16 year old son today, his rear end came off the passenger seat and was held in by the seat belt. Thought his eyes were going to pop out. And yes I'm older, the stop made my nauseous again - it stops that hard and fast. The ABS engaged twice, only for a split second , on the stop. I'm also running Bridgestone S-03's with 1/4 tread, size 245/45/17. These tires stick like there's glue on the road.
Last but equally important for me. With the front 300ZX calipers and stock rears, the nose of the car would dive drastically on heavy braking. Now, the car stays fairly flat, similar to the stock brake system. The brake bias seems to be just a tad more to the back compared to stock. But thats my 30 years of agressive and racing driving experience saying that, not any sophisticated equipment. All you guys with front only BBK - 300ZX, Brembo, Wilwood AP Racing, etc - this rear system is a must. And for you guys running cheap tires, get some good tires to get the full potential out of these brakes.
Mike
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prolly not.. not unless you have some HUGE front brakes already..
plus I'm not going to do all this work for another car. if it doesn't fit, then it doesn't fit.
Do you have a front brake kit yet? there is absolutely no reason to touch the rears until you have the fronts done. In fact, it's dangerous to run with too much rear bias.
But if you really want big rear brakes, use Z31 rotors in the back and keep your stock calipers.. The Z31 rotors are about an inch larger than factory, and all you need is a bracket off an 89 or early 90 model SE Maxima. I did this conversion years ago, and it's enough for me, even on heavy track use. http://mattblehm.com/pics/car/brakes/ scroll down to the bottom and look at the rear*.jpg pics.
If you cant find them, go to forums.maxima.org and get in touch with Jeff92SE and he'll hook you up with a set.
matt, will you be making a rear relocation kit for 5th gens? Kind of like your front relocation kit. I would probably be more interested in that one since this Z BBK would probably be out of my price range
I thought about it, but there's no rotor out there currently that will work- I'd have to have them custom made, and as $200/ rotor for that, there's no real point in it. you'd spend almost as much on the relocation as on this kit.
the parking brake cables don't have enough slack in them, so they would have to be replaced/stretched to make it work as well as the rotor. not much fun there.
It's a big pain to find these brackets in the bone yard. I have these brackets fabricated and IN STOCK. I just got another batch of 5 sets done. I don't get these made very often. $90 shipped. That's a good price considering how big these are and how much cutting there is to do. Plus you don't have to wasted a day digging around in a dirty boneyard.
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Originally Posted by Matt93SE
If you cant find them, go to forums.maxima.org and get in touch with Jeff92SE and he'll hook you up with a set.
3 gen big brake conversoin
Linear Mode
