I could have gotten you the Calipers cheap. My g/f's dad owns 2 NAPA stores in the area. Good to see you will have some stopping power Bed them in properly and you should be set. One question, why didn't you add stainless lines???

 

I agree. Hey, my calipers don't have the two things on the sides...

 

yours dont? Mine do but Mike has the J30 calipers as I do also.

You have the Q calipers and maybe they dont share the same caliper bracket as the j30/maxima does.

you should have it. found a pic of the q45 caliper and they have it also.

 

that's funny...jeff's bracket lines up w/ the holes perfectly. I guess that's what counts, right?

 

in mikes picture he doesnt have the caliper bracket which botls to the brackets we got from jeff.

what happened to the pic you had of your calipers? I could have sworn yours look the same as Mike's and Mine + caliper bracket

 

Oh I see

 

hey mike keep me updated with the install. i've got a set of calipers waiting in my garage. Would you mind taking some pictures of the install. I know maxmaxima91 has some but just wondering if it would be the exact same thing on a 4th gen. Does maxmaxima91 have any more spacers available or he just made a set for you?

 

I am actually going up to his shop to do the work. I will definately take pics and ask him about availabiliy of more spacers.

 

Great, now you tell me!

 

Spent sat evening with maxmaxima91 on the J30 swap.

This can be done very easily by just milling down the J30 rotor to get the Maxima torque member to fit over the rotor. We went the long way around by grinding down the torque member. Also used was a 1/16" spacer between the hub and rotor, which is needed no matter what. Forgot to take pics of the spacer, sorry.

J30 rotor and maxima rotor. the J30 is very wide

http://img.photobucket.com/albums/v1...Picture026.jpg


Pics of the different spots we had to mill down on the torque member. Basically it is a matter of taking off enough matereial to make the casting just about flat. When you get the torque member off and take a close look at it you will see what I mean. Both side of the TM need to be done, even though I only have a pic of the one side

http://img.photobucket.com/albums/v1...Picture032.jpg
http://img.photobucket.com/albums/v1...Picture031.jpg
http://img.photobucket.com/albums/v1...Picture029.jpg


Milled TM over the J30 rotor

http://img.photobucket.com/albums/v1...Picture033.jpg


Everything together

http://img.photobucket.com/albums/v1...Picture034.jpg
http://img.photobucket.com/albums/v1...Picture035.jpg


We had to take a little material off the pads as well to be able to get the caliper over everything. And the clips had to be filed down a little as well. Like I said, just getting the J30 rotor cut down should take care of the fitment issues but if you want to keep the advantage of the thicker rotor then the torque member will need some work.

I would like to give you guys my impression of the results. But thanks to NAPA that won't be happening for a while since one of the calipers they sent me was wrong. Didn't notice it till we were about to do the other side.

http://img.photobucket.com/albums/v1...Picture036.jpg

 

Thanks for posting your pics. Looks like there's a lot of modding involved. More than we thought. I hope i don't come across this when i do the Cobra swap.

 

Like I said. Getting the J30 rotors milled should be the easiest way. But you may have to take them down to the lowest tolerance level to get them thin enough to fit the torque member over. Grinding down the torque member instead is not that hard, just takes a while if all you have is a hand file.

 

this doesn't look too diffcult, just a little bit of milling and filing. This setup will probably go on my car as soon as i finish with some other work. is there any more sets of the spacers or any plans for them? By the way did you have to grind down a piece of the caliper or TM like maxmaxima91 had to on his 3rd gen?

 

The install looks like it went pretty smooth minus the set back. Pics look good, and the setup looks like it came from the factory like that.

Mike the spacers you used, arent they the same thing basically as the hub centric rings?

 

Yep, basically did the same thing he did on his 3rd then from what he said.

It really isn't that much to do. For someone like me it is half the fun.

I am sure he would make up a spacer for anyone for a small price.

 

Not hub centric rings, but pretty much the same thing as basic wheel spacers except they go inside the rotor. Rings just center a wheel and don't have any surface to them.

 

did you get both calipers on yet or still waiting for the correct one? how is the set up?

 

Not yet. Waiting on the correct caliper. Will probably be next week

 

You will definately have to do all that grinding if you plan on using the stock torque member with cobra rotors.

 

The Maxima TM or the Q45 TM? I'm using the Q45. Will i still need to grind?

 

I believe they are the same. the Max and J30 are the same.

 

they are the same as in they both bolt up to the same locations, but the Q45/J30 TM must have different dimensions since they use a much wider rotor. Using a Q45/J30 TM may not require removing material.....but it really needs to be attempted to know for sure, there could be other fitment issues with the Q34/J30 TM that may come up.

 

The rotors are wider and the hub on a J30/Q45 would accomidate for that. Hence why we need Jeff's Bracket so that the caliper can fit onto our hubs. Besides that I cant seem to find much of a difference caliper wise. They are both just about the same size length and width, just 2 pistons on the J/Q.

So with the Brackets, and milled down rotors, or milled down brakcets in your case, should eliminate most of the problems to be ran into. But the real problems will arise when doing the swap.

 

You are totally misunderstanding the torque member issue.

The rotor fits INSIDE the torque member (the torque member goes on both sides of the rotor.) The J30 torque member and the maxima torque member are NOT the same, it would be IMPOSSIBLE to put the J30 rotors inside the J30 torque member if the were the same. The maxima torque member does not have a large enough "hollow" slot in the middle for the rotor to fit inside.

They have the same bolt pattern, that's why they bolt up the same, but they are NOT the same part.

 

I don't know anything about the q45 torque member so I can't answer that question. All I know about is the maxima torque member and the J30 torque member, and I know for sure that they are NOT the same part. They have the same bolt pattern (the bolts line up the same) but there is more space inside the J30 torque member, otherwise the J30 calipers would not even fit on a J30 and that wouldn't make any sense would it lol.

 

let me see if I'm understanding this better.

they are different due to the mounting location on the hub? Since the J uses a wider rotor, the TM on the J would be wider or deeper in order to accomidate it. The Maxima TM wouldnt be as deep since the rotor isnt as wide?

So then is it best to use the maxima TM with J calipers ? or best to get the J TM to match?

I'm a little confused here.

 

Look at mikes pictures and see where he had to grind away at the maxima torque member, that's the "width" portion of the maxima torque member which is not enough. The maxima torque member is only designed to have a 22mm thick rotor inside it, but the J30 rotor is 30mm thick, thus it doesn't quite fit inside, that's why you have to grind on the torque member to get the J30 rotor inside the maxima torque member.

I don't know if the J30 torque member would work on the maxima for this swap because I haven't seen a J30 torque member or tried to bolt one onto our hub to see if the rotor sits nicely inside it. It would certainly bolt onto our hub (because the bolt spacing is the same for both J30 and maxima) but I don't know if the J30 rotor would sit in its proper position.

 

I get it, hence the reason for grinding the torque member, or milling down the rotor so that it can properly fit inside the bracket with clips and pads.

so hypetheticall if the J30 TM would bolt onto our hubs there would be no need to mill down anything as everyhing is designed to work with everthing?

I'll see if i can get my hands on a J30 TM, get some pics and comparison.

 

if you use the j30 TM i believe you will have to mill the rotor down 3 millimeter in diameter becaue it sits closer to the center of the hub. I think tilley is running this set up: J30 calipers, TM, Stock rotors milled 3mm from the diameter.

 

That is interesting. If that is true then using a spacer between the hub and rotor would be all one would need instead of milling down the rotor.

 

I'll ahve the Calipers off of my 1992 Q45 for sale soon.

Moving up to 300zx setup.

anyone want them?

 

I have tried a j30 Torque member.. way back in september when i first figured out this swap. When you bolt a J30 TM to a maxima spindle, it is not placed out far enough to fit over the rotor. So obviously on a j30 the placement of the TM mounts are out further from the center of the axle than on a maxima. That is the difference between the Maxima TM and the J30 TM, it is as you might say... "taller" than the j30. Yes, you can use a j30 TM, BUT ONLY if you mill the rotor down in diameter (not thickness). This is what i did NOT want to do. For one, it is detrimental to brakeing power.. and also , it would void my rotor warrenty. Therefore since i knew that the maxima and j30 rotors were the same diamerter, i knew i could make this swap work if i could only make the J30 rotor fit under a maxima Torque member. So that is what i did.. and now also what mike did. And trust me, its really not all that hard. You can do everything with a hand file and a vise. I hope this helps clear some confusion up.

Jeremy

 

so we've seen a set up that works, but would a full J setup just bolt up? a full J setup being J rotors, J calipers and TMs, J pads; then not sure if this has been covered but i'm guessing just standard maxima SS lines.
but would you still have to mill 3mm off the Dia. of the J rotors and still have to get the 1/16th in. spacers?
so far thats kinda what i'm getting out of this thread.

 

the rotors will still need to be milled down 3mm off diameter but i'm not 100% sure about the spacers but i do think you need it.

 

If you mill 3mm off the radius of the rotor, you won't need to do anything else to fit the J/Q brake setup. No spacers will be required.

 

so the spacers were just to get the maxima TM to fit properly?
and maxima SS lines will fit the J30 calipers?

 

Exactly.
I know for sure that the regular lines fit perfectly, since that's how I'm using my brakes, so the Maxima SS lines should fit, AFAIK.

 

The spacer Jeremy and Mike are using moves the ROTOR so it is centered in the middle of the torque member, it doesn't move the torque member itself.

 

oops, didn't read the question carefully.

 

thats what i ment, i was typing real fast before i left work, so i didn't make that real clear