info on q45 brake upgrade

[mixeds14]

can any body tell me what year q45 i can use the front brakes as an upgrade n also what about the rear?

[italiansp_10]

you can use 91- 96 front brakes.. i used 96 just to be safe..

[ILoveMyRHS13]

Don't ever upgrade rear brakes... Unless it's for new rotors that are the same size but slotted/drilled. You can use 92-96 Q45 brakes if I remember correctly... You just need to drill the holes for your 4 lug if you have one.

[mixeds14]

so i shouldnt upgrade the rear only the front i do have a four lug but i would like to convert it to a 5 lug n since im going to the juck yark i see waht i can find any other car i could use to upgrade i apreciate the help thanks

[mixeds14]

so i shouldnt upgrade the rear only the front i do have a four lug but i would like to convert it to a 5 lug n since im going to the juck yark i see waht i can find any other car i could use to upgrade i apreciate the help thanks

damn my speeling suck

[KA24Power]

if you dont' want to convert to 5 lug, 94 altima front rotors work too. they're a bit thinner, but already 4 bolt.

[ILoveMyRHS13]

if you dont' want to convert to 5 lug, 94 altima front rotors work too. they're a bit thinner, but already 4 bolt.

No. Bad idea.

[mrgreeneyes]

agreed. dont go ghetto/cheap. no altima rotor BS.

order new rotors online and have them redrill to 4 lug... most places do it for $10 extra/rotor. thats dirt cheap to have it done the proper way.

i personally have 91 Q45 brakes on the front of my s13, and had them on my last S13... i LOVE them. dirt cheap to buy, rebuild for $40, use dot 4 synthetic fluid, stainless steel braided lines... yadda yadda yadda.... aka amazing bang for the buck. braking is more progressive and confident feeling. brake fade is totally gone, the car seems to decel more smoothly also b/c you dont have to work the system so hard anymore. i also have stock master cylinder and an automatic s13 brake booster (slightly larger than the MT version).

any questions? email me man... its in my profile. ill be more than happy to point ya the right direction

[hbpignosePA]

i agree dont cheap out on somethin like brakes... i did hear that b14 sentra rotors work... i bought drilled and slotted rotors for my q45 swap from a company out of arizona... fastbrakes is the name... they were already drilled for 4 or 5 lug and 11 inches

gl hope this info helped

[KA24Power]

lol, wtf are you talking about? I got j30 fronts, and they are just a bit smaller than q's. 280mm rotor... same as z's and q's and j's, but instead of 32mm Z's, or 26mm Q's (iirc) or 24 J's(again iirc) thery're like 22 mm. fit fine, and no redrilling bull****.

the pistons will never over-extend their intended reach, and the rotors don't wear out THAT much faster.

[italiansp_10]

i bought re-manufactured calipers.. and i got some drilled and slotted rotors from irotors.com they even redrilled the fronts for me to a 4 lug application.. i love the brakes they make a huge difference.

[mrgreeneyes]

the pistons will never over-extend their intended reach, and the rotors don't wear out THAT much faster.

its not about pad wear... its about brake clamping power/onset of said power. if your rotors are the CORRECT width for your Q, your brakes will engage sooner and without the slop of a few MM on each side... and since they engage sooner, they require less fluid to actuate them, resulting in less pedal travel required, giving your brakes the sporty feel/performance you are supposed to have. they wont behave like a hodgepodge frankenstein setup that wont keep the calipers and rotors aligned properly.

[Razi]

If you upgrade the front and keep the rear stock.Won't that mess up your braking bias?

[KA24Power]

actually, they will work fine with no extra pedal movement. when the piston pushes against the disc, it stays there. there is no returning spring to pull it all the way back into the caliper. so effectively when you hit the pedal, the piston moves about 2mm MAX to push the pad back up against the rotor.

The rotor isn't a "hodgepodge frankenstein" setup. the caliper is bolted to the knuckle, and the rotor is bolted to the hub. the only movement is in the caliper bracket sliders, and guess what? those only move when the brakes are applied.

go look at your brakes after pushing the pedal, or better yet go to a brake job. you will realize that until you push back the piston (which isn't easy, its forcing brake fluid back into the master cylinder) the new pads won't fit on the new rotor.

If you're gonna try to tell me I'm wrong, make sure you're right.

[sommmatt]

actually, they will work fine with no extra pedal movement. when the piston pushes against the disc, it stays there. there is no returning spring to pull it all the way back into the caliper. so effectively when you hit the pedal, the piston moves about 2mm MAX to push the pad back up against the rotor.

The rotor isn't a "hodgepodge frankenstein" setup. the caliper is bolted to the knuckle, and the rotor is bolted to the hub. the only movement is in the caliper bracket sliders, and guess what? those only move when the brakes are applied.

go look at your brakes after pushing the pedal, or better yet go to a brake job. you will realize that until you push back the piston (which isn't easy, its forcing brake fluid back into the master cylinder) the new pads won't fit on the new rotor.

If you're gonna try to tell me I'm wrong, make sure you're right.

He's right, if you think about it, when you change out an old rotor and pads that have nothing left to each of them, they're still rubbing constantly, even though they're much smaller than they started out to be.

[frosti108]

i recently did the front Q45 swap on my 240. i redrilled the rotors to 4 lug myself. also put in SS brake lines. definatly feels a lot more firm than stock. i still need to get new brake pads though (still using the stock ones from the j-yard)

oh yea and if your doing this on your sohc s13, make sure to grab the slider brackets as well. the sohc bracket is a bit different from the dohc and q45 brackets. it makes it easier anyway, just 2 19mm bolts per side and the whole bracket, caliper and pads setup comes off, then just knock the rotors off with a sledge

[mrgreeneyes]

all said and done, ill stick with the way nissan/infiniti designed that combo to work. my guess is they know what they are doing.

besides, more mass = more heat transfer ability = further reduced fade

op, do what you like. take my advice or ka24power's. both of us are gonna swear up and down that our setup is better.

Brake bias: a slight bit more front bias, however, that makes for a nice trailbraking and/or corner entry setup

[KA24Power]

if they knew what they were doing your car would already have the altima rotors on it... like on the 180sx. Really, you're just upgrading the caliper.

[Frank R]

Hey, Any of you guys know anything about using the wheel setup off a 300ZX on the S13? I'm considering investing on the 5 lug conversion hubs but I'm not sure what year 300ZX parts I'm supposed to use. I'm assuming the rotors and breaks would also have to be off the 300ZX. Do any of you guys know about this? Help!

[98s14inaz]

If you can get your hands on a nismo catalog the q45 brake set up was sold as an "upgrade" for the 240sx/silvia. I got a junkyard set of calipers for cheap, bought the rebuild kit, freaking love them. The key to bigger brakes is good pads and really good tires. Don't expect these to work right with out those two things.

[White Comet]

i have to agree with kapower that the braking wont take longer because the piston doesnt move back out, but i said with greeneyes in that i'd much rather have the larger rotor (which i do). sure the altima rotor will work but its not that hard to redrill 2 rotors.

on another topic, i heard that the sentra se-r spec v has the exact same rotor (sizewise0 as the q45 only its 4 lug. no one ever confirmed it though but its said u can run a spec v rotor, have the same dimensions, and u dont have to redrill