They are both about the same thickness with the obvious difference being the placement of the pistons on the Q caliper.

 

They both weigh about 9-10lbs according to my bathroom scale.

I will be running the Q45 caliper because of this....

 

so, are you gonna sell the zx calipers?

 

Yeah I was thinking of throwing them on ebay, they are in great shape but I ended up getting the Sedan G35 wheels so the offset is wrog and they don't clear otherwise I would use the Z calipers. Like I said the weigh about the same as the Q calipers.

 

hey do you need to change the stock 4th gen rotors with either of these rotors? and do you need bigger rims, bc i have the stock 02 maxima 16 inch rims, and ive been looking to upgrade my brakes w out getting a whole bbk. whats the advantage of either of these to the 4th gen stock calipers?

 

pm me if your going to sell.

 

hey zack, i thought we were gonna work something out. i sent you a PM earlier today. let me know what's up.

 

Do they both provide the same stopping power? Those were the wheels I was looking at but I wanted to do a BBK.

 

if anyone is interested in the calipers Pm me.

 

Hey, Iron Mountain does our shredding at work...

I'm probably going to be doing Q45 calipers in the future.. but no $ right now

 

Zack, you should probably clarify that the 300z units are the IRON versions and not the aluminum units. The aluminum units are way lighter than any iron caliper regardless of the # of pistons

 

PM sent. . .

 

Yeah what he said. Its too bad they don't clear the dran wheels but oh well I already have the Q calipers so I will just install them. z calipers are hard to come by, Junkyard never have them. Ebay the demand is too great because of 240's.

 

Thanks for clarifying. I was under the assumption they were aluminum.

 

So the Q45 calipers are better?

 

I just received my Q45 calipers today hopefully Wednesday if the weather holds. *crosses fingers*

Whoever snatches up the Z32 calipers I'm sure will be extremely happy.

Interesting how the Iron Z32 calipers and Q45 calipers weigh basically the same. For some reason I thought there would be a slight difference in weight. Those looking to do a BBK in the future, you can't go wrong with either caliper. 2 piston or 4 piston is always better than 1!

 

no they just weigh less.....but u can get 300z in aluminum...and IMO 4>2 even on track days in the rain my BBK doesnt lock up...its all in the tires

 

how much you looking for the z calipers?

 

wheres the "nissan" logo?

 

with the 300zx caliper 1 would have to get a larger rim... and i dont want to do that. will the q45 calipers work with the stock 16" rim - clearance wise(for my 97 maxima)?
- and will it be a direct bolt on too?

i would probably like the lighter weight 300zx version, but thats just not going to happen.

 

Hey, which rotors are you using? the Cobra's or the 6th gen?

 

Well I'm gonna be doing g35 rims soon so I'd like to go with the 300zx calipers.
1)What calipers are you guys running?
2)How hard is it to replace the rear brakes with the 300zx calipers?

 

You cannot replace the rear with the 300zx setup, the 300zx uses a drum type parking brake that is not compatable with the Maxima.

 

Ok thanks alot I thought I read about people changing the rears as well.
How's the look with the front calipers twice the size as the rears? Does it look funny at all?

 

u can if u buy matts rear kit

 

Who cares about the rears when you have 13" rotors up front! But seriously, looking at pics, it doesn't really looks that bad. Most cars have larger front rotors. This is just a little exageration.

 

Sounds good. Thanks for the info. I'm gonna do this when I get new rims.

 

It does look really dumb with the fronts much bigger than the rear. Especially when your wheels show the brakes.. I have it....

 

mustang cobra 13", jeff's kit and Q calipers. I sold the Z calipers

 

What types of rotors can be used? Just the cobra's or 6th gen? Will Brembo crossdrilled for the 6th gen work with 300zx calipers? What other hardware is needed to do the bbk? (sry, new to working with brakes and all!)

 

The type of rotors that can be used are "Cobras" "6th Gen Rotors" & "300zx Rotors" of course. Yes, brembo crossdrilled will work with 300zx calipers. And hardware needed would be ss brake lines, pads of course for the brakes,Jeff's brackets and centering rings (only if your getting 13 Ford Mustang Cobra rotors)

 

So 6th Gen rotors don't need new the brackets? How would the 6th Gen calipers and rotors do on my 98?

 

hey guys good ? but what rotors work with the Qs if you dont use the brackets-i have a 97 and have the z32 calipers/rotors but cant find a machine shop that will cut the rotors down 4mm- so i want to buy the Qs but dont no what year and what rotor - do not want brackets just the Qs and rotor if possible

 

If you use the Q calpiers and rotors, you will run into the same need to cut the rotors as the Z rotors.

 

I was just about to point out the same thing jeff stated about the rotors:

you will need to mill the 300zx rotors if you want to use the calipers in the stock mounting location. about 3-4mm off the rotor diameter.
the 300zx rotor is also recomended for the swap because it's 28.0mm thick vs the 20.0mm thickness on the 4th gen rotor.
you WILL notice the difference by going with a thicker rotor, and moreso with the 300zx calipers.

NOTICE: you will feel the front brakes lose their initial grab considerably if you use the 4th gen (20mm) rotors. this will start to happen after your brake pads get worn about 65%, the main braking will be done by the rears, and then the fronts will kick in once the pedal is closer to the floor.. trust me on this, i've been there before i swapped the 4th gen with 300zx rotors.

if you DO this J30/Q45/300ZX swap using the STOCK mounting location, do yourself a huge favor and get the 300zx rotors, the pistons won't have to travel further out with the thicker rotor.

somebody mentioned the rear brakes, with the front 300zx calipers and the stock master cylinder the maxima tends to nosedive alot when you "step" on the brakes. - that's front brake bias for you.
with the complete 300zx brake swap the maxima doesn't nosedive and is extremely stable if braking during turns.

keep in mind there are other larger rotors to use with this swap requiring brackets

it all comes down to the wheels, particularly
wheel size: 16 or more
and wheel offset

if your wheels offset can clear the 300zx calipers --get them. if they don't, then go with the q45/j30 2-piston. if your wheels are 16in then go with stock location if they are 17 or more, you have a choise to go with larger rotors and brackets.

BUT I will NEVER stop telling people that it is the TIRES and the BRAKE PADS that determine how well your brakes CAN BE. IMHO SS brake lines also play a role too.

 

Completely agree with vipervadim, since the Q45 calipers are of a 2-piston floating caliper design, just like the OE Maxima calipers, while the 300zx calipers are of a 4-piston fixed caliper design. The 300zx caliper offers fairly good brake bias, imagine your brake pressure being split 10-ways where 8- pistons are dedicated to the front and 2-pistons dedicated to the rear. You would theoretically want 70-80% of your braking power for the front wheels because of a simple weight transfer principle. You would mostly likely want the 300zx master brake cylinder also, or else it just wont feel right.

Ideally, you would want a biggest, thickest and heaviest rotor paired with a lightweight caliper that would provide a good bias. Bigger diameter gives your brakes more leverage, imagine pushing by a door hinge instead of the door handle, and usually cools better since the pads dont travel over the same area as often. Thicker rotors are less prone to cracking and warping and generally handle heat much better. Heavy rotors are characteristic of big, thick rotors and have the enough material to distribute the heat generated. The 300zx rotor is 11.8" and is rather tiny by today's standards.

Personally, I would jump straight to Stoptechs with 17"-18" wheels. I upgraded my 300zx brakes to Stoptechs a while ago.

 

Well Stoptechs are fine. But cost probably 2 to 3 times as much.

 

LoL, The stoptechs are huge. Caliper is twice the size and OMG the rotors are just ridiculous at 13.1". Besides, stoptechs are all new parts where as used caliper seals may fail at any given time. You need to see the pictures of them side by side. Can't seem to find them right now but you would be surpised how much thicker the stoptechs are. You get what you pay for.

 

Um yeah. The cobra rotor is 330mm x 26.4mm+ in diameter/thickness and you can purchase newly rebuilt 300z calipers if you wish. Is 0.1" worth the huge price diff? IMHO no. But the Stoptech kit is a fine kit. You want to see expensive? Try the 6 piston kit that uses AP Racing calipers.

 

If your interested I am selling a cobra BBK. Rotors,Brackets,Hubcentric Centering rings and Bolts.
Check the link in my sig.