Redtop_240

Cool less work for me.......( I love allready having the 5 lug setup)

-Jeff

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JDM JUNKYARD.NET

mellojoe

What years Q45? The q45 came in just about every year of Infiniti.

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240Stilo

j/k....or am I? HahaHhaHaha


Alright I strapped on the spare wheel and I didn't notice any clearance issues. So now I'm 98% sure that stock wheels will work, given that I'm never 100% sure about anything.

As for what year q45 I would just stick with 95. It worked for me and it will work for you. But, if you search I think anything before 97 q45 will work.

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-Juan

mixxamike

are these 4 piston brakes? and are the calipers and rotors similar in size to the z32? Actually, if someone could tell me the size of the rotors, it would be great!

AceInHole

1. Q45's come with 15's stock. The calipers will also fit behind steelies. As for offset, Kookz had Altima wheels on his car previously, with that ridiculous FWD offset. They cleared his Q45 fronts just fine.

2. Doing a full Q45 brakeswap is possible for 250 - 300 if you can find the junkyards. If anyone needs Q45 calipers let me know. I'm pretty sure there's still a bunch near here.

3. Definitely upgrade the MC if you go with a full front and rear swap. I'm running a 17/16" MC right now, but it's definitely overkill. a 1" would probably be better, and even a 15/16" might do. Using the 17/16" MC, my brake bias is VERY neutral. The car rotates very well under heavy braking. The difference between my car and my friend's car with only z32 fronts upgraded was very noticeable. His fronts would lock up too easily to go into corners as deep as my car could.

4. You can redrill the rotors by hand if you're brave. I did and was fine autocrossing like that (although I've since swapped to 5 lug).

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AceInHole

the fronts are 2 piston. rears are single piston. all are floating caliper.

IIRC, it's 11" front, 11.4" rear (might be 11.6 but i forget). Fronts are 28mm from what I've read. I'd assume you could use 30mm z calipers with those rotors, or 26mm z rotors with Q calipers, as long as all the rotor hat offsets are similar.

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240Stilo

The rotors I got are 26mm. That's what the parts store gave me as q45 rotors so that's what I used. The reason I say this is because it's been said q45 uses 28mm rotors.


ACE- Why did you have to upgrade MC if the rear calipers are also single piston? Bigger piston or something?

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-Juan

AceInHole

it seems as though the rears have a larger piston. it might just be that with no e-brake mechanism in the caliper, there's a larger active piston head area (which would require more fluid per piston travel). we bled Kookz' brakes for a couple hours and his drive home was still very mushy.

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mrmephistopheles

90-96

mixxamike

so the z32 brakes would most likely be better than the q45 brakes? (4 piston compared to 2 piston, 30mm compard to 26mm) i dunno, maybe i'm wrong...just a guess.

What are the differences in diameter of the z and q brakes?

Peace,
-Mike

DSC

Oh, the Z brakes are definitely better...
But some people find them SOO good they can't controll it...the feel is gone. Which IIRC is also a characteristic of the z style caliper (what are they called again?) vs Q45 or 240sx floating calipers.
Clearance with a floating caliper will be much better than a 300zx style also.

So, to some the q brakes may be "better" overall even though they don't have the same power as Z brakes.

The only question I'd really have about them is how good is the pad selection for a brake setup that came on a luxury car...

Edit: anybody ever use a dual MC setup on their car?

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s15dude

Also, another brake swap i recently learned about was putting altima brakes on 240sx's, the front rotors are about 1.5"'s bigger and the calipers are much bigger, it is a single piston floating caliper, so might not be as good as Q45 brakes, but definately better than stock, also, Infiniti J30's used the same brakes as Q45 I think, so if you goto the junkyard, there should be a wide range of cars to look for to rob brakes from.

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mellojoe

I've got the 5-lug going for me, too.

I was just about to go scavenge for some z-calipers when I came across this thread. THis is perfect for me. I've got my daily driver that sees the 1/4mile track occasionally, but has YET to see the twisty-course. Even after I go auto-x'ing, it will still only be sporatically and never very intensely.

So, while lying out my suspenion, brakes were on my mind. Bigger rotors, bigger calipers, bigger pads, and I can even get a 2 piston (I know its not the 4-piston grabber of the z), and I don't have to shell out ANOTHER $100 for ANOTHER set of stainless brake lines. That makes me glad. Sure, its a little thing, but it counts, right?

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Anubis

so lets recap here, 90-96 Q45 front calipers bolt on to an s14 and use the stock Q45 rotor(for 5 lug) and a re-drilled stock rotor(for 4 lug). And if your just swapping the front brakes, there is no need to change the master cylinder? correct?

mrmephistopheles

correct. if anything, adjust the actuator rod in the booster.

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rco8786

Offset has 0 to do with brake clearance...it's all in the wheel design. My guess is that steelies will not, and the SE wheels may but it will be very close.

From what I know, the Q brakes are similar to the Z, but the rotors are a tad smaller and I think the Qs are 2 piston and Zs are 4. correct me if I'm wrong.

brianglawson

um i think they said earilier that steeles will fit man....they have pretty easy wheel clearence, this is a great upgrade for people wanting to stick with old skool wheels i would say

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Ghettokracker71

Okay....I am confused to bare with me...

I like my 4 lug,and am sticking with it,if it will clear steelies it will definitely clear my wheels...

I also have a really stupid question...

The z32 brakes say "NISSAN" on them...do the Infiniti ones have the symbal or say Infiniti on them?

Just wondering

HaLo

No. They don't even look alike. they look more like an oversize stock 240sx caliper

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-> HaLo
Race Car: '98 E36 BMW M3
Daily Driver: '08 Fiji Blue Honda Civic Si
SOLD: 01 GPW Honda S2000
PARTED: 93 Pearl White 240SX LE Fastback w/SR20DET
SOLD: 93 Super White 240SX SE Convertible w/Silvia Front

mellojoe

And the 300zx rotors are the exact same size as the q45 rotors, fronts are both 11"

There ya go.

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HaLo

What's the major difference with the next generation Q45 brakes?

97+ have much more options for brake pads...

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-> HaLo
Race Car: '98 E36 BMW M3
Daily Driver: '08 Fiji Blue Honda Civic Si
SOLD: 01 GPW Honda S2000
PARTED: 93 Pearl White 240SX LE Fastback w/SR20DET
SOLD: 93 Super White 240SX SE Convertible w/Silvia Front

Ghettokracker71

Caliper size? From what I understand they clear alot more wheels than the 300zx brakes....and price would be another concern

philbro

the calipers are a lot smaller on the q45, from what i understand they will fit under all stock wheels. And the rotors are both 11in but the z32 calipers a like 3 or 4 mm thinker than the q45

Ghettokracker71

Well then I know it'll clear my +40 offset ....hah hah