I know this has been covered, somewhere.. but after searching for over an hour i cant find a definitive answer. The links in the sticky for brake questions are all dead. So real quick:

I have brackets for mounting 300zx calipers and 13” rotors onto a 4th gen. I think the only difference with a 5.5gen is the mounting bolts are 14mm compared to the 4th gens 12mm,
but otherwise the spacing between the holes is the same - meaning I would have to drill the holes on my brackets out another 2mm. Any oldheads in here aware of any other potential issues that could arise here? The goal is 13” rotors and Z32 calipers without overhang, rubbing, etc. I feel like I knew this stuff at some point but that knowledge has since been forgotten, so forgive me on that. Thanks guys.

Heres some eyecandy while we are at it.

 

Kept digging and of course I found the answer, in my own posts none the less.

https://maxima.org/forums/5th-genera...n-brembos.html

Which in turn led to another question. If im using wheel spacers, and the 13” rotors in the front require hub rings, wouldnt that mean that I need to source wheel spacers that match the cobra 70.3mm hub size rather than the nissan 66.1mm hub, since the spacers will be going over the rotors + centering ring? Im also concerned about having the rotor stud holes AND the wheel spacer stud holes being wider than the nissan studs, last thing I need is the whole thing to shift during hard braking and sheer the wheel off or something crazy.

 

i don't know about hub centric ring for rotors, that sounds weird to me., only have heard of hubcentric adapter rings for only for wheels fitting on different hubs . I have 10mm spacers upfront, and 20+3mm spacers in the rear. My summer wheels use hubcentric rings that then butt up to the 66.1 hubcentric spacers.

what rotors are these? wish I could be of more help but never heard of adapters for the rotors themselves it sounds odd to me

also about your stud question. in my case the wheel spacers that are made for the 5th gen maxima ( the 66.1 hub) when the wheel is off they can slightly rotate +/- 1/16" around the studs, basically the studs are slightly smaller than the spacers stud holes diameters,

i think the hub match is the most important part, that little bit of play around the studs isn't anything to worry about. i have been riding with these hubcentric spacers and aftermarket wheels with hubcentric ring adapters and stock wheels for 200k miles.

 

The rotors are from a Ford Mustang cobra, they share the same lug pattern as Nissan (5x114.3) however Nissan uses 12mm studs where as these rotors have 14mm stud holes. In order to make the rotors work, they either need to be redrilled for the Nissan 12mm, or a hub ring with an ID of 66.1 (nissan hub size) and OD of 70.6 (ford hub size) so the rotors become hubcentric.

The issue i see is that if I use hub rings for the rotor, it would mean that my nissan sized spacers would no longer fit. I would have to get spacers that would fit over the Ford 70.6 hubsize, which seems like they would also have 14mm lug holes. My wheels are lugcentric, so im worried that with both the rotors and spacers having oversized lug holes, that this would cause centering issues with my wheels.

I could either just not use spacers (pretty sure the z32 calipers will fit without them but I did want to maintain the look my car has) or, I could redrill the 13” cobra rotors, making them lugcentric, and allowing me to not need a hub ring, which in turn would let me use a Nissan hub sized wheel spacer.

Idk, i dont really see much discussion on this particular issue, so im not sure if that means it doesnt really matter or if it was overlooked by others. With all the extra stopping power, i dont want my lugs sheered off as the spacers and rotors shift a couple mm during hard braking.

 

At this point im pretty much just thinking out loud.. but can anyone see a problem arising if I was to sand the depth of the centering rings down, so that they are flush with the face of the rotor? This would allow the actual 66.1mm Nissan hub to be above the rotor face, which in turn would would allow the hubcentric wheel spacer to interface with it. This seems like the easiest, cheapest, and simplest solution to the problem. The rings are made of some sort of nylon plastic and should go down easily on a belt sander.

 

Will these work on my 97

 

You will need the “dogbone” adaptors to make this setup fit, see post #42 of this thread for reference.
https://maxima.org/forums/5th-genera...n-brembos.html
Unfortunately, these adaptors were made in the mid 2000’s by a forum member and have not been available since. I was lucky enough to find a set almost 10 years ago, and even luckier that nobody bought them from me when I tried selling them, because theres no chance I wouldve found them again. I think Fastbrakes sells BBKs for 4th gens but as far as using 300zx calipers, Im not aware of anyone offering brackets that make them fit anymore.

If someone was serious about making them again and had access to a machine shop, Id be happy to take any measurements needed to help make that happen. Wouldnt be surprised if theres enough interest out there to make it a financially viable venture.