J30 Brakes DONT equal Q45 brakes? HUH? PICS

[gotta240]

I had a bunch of caliper laying around. Finally posted a set of the j30's for sale. While packaging and comparing them to some Q45s(i'm pretty sure thats what they came off of) i noticed some slight differences. Maybe not enough to matter, but different none the less.

Or maybe i just have the calpers switched around?

Cause i THINK the

J30 have the brake line inlet "holding brackets" facing the motor bay.(those two little pieces of metal that hold the brake line strait). Basically, they face the "wrong way" for an s14. I dont think it matters much as long as the brake line is tight, but it IS facing a different direction. (i used the same calipers on my s14, and have had no problems.)

Q45(i think, lol) have the brake inlet "holding brackets" facing towards the top of the car. Also the brackets of these brakes appear to be a little thicker. Pics below.

Am I correct in calling the top ones j30 and the lower ones Q45? Has anyone else noticed these differences? Everyone claims they are identical, but i'm finding differently.

[MadMaverick]

There are no pics here...

[gotta240]

http://i112.photobucket.com/albums/n169/mrmikeman/IMG_4892.jpg

What i believe are Q45 on Left, and J30 on right. Correct?

[steve shadows]

they look the same to me

[DOOK]

calipers look the same, just a difference in bracket location, no big deal.

[projectRDM]

The line is different, hence the fitting is changed on the caliper, but since they both use a banjo bolt it doesn't matter.

[MrChow]

I thought only different thing was the brake pads. But everything was basically the same.

[UNISA JECS]

If anything there was probably a slight revision to the parts because they both have the same specs for rotor diameter and thickness and pad demensions are the same for the Q45 and J30 in the front.

I have dealt with both types of calipers you posted and both work exactly the same.

Heres my pictures of an old setup of mine.

http://i167.photobucket.com/albums/u159/zilvia_album/SOLD%20STUFF/PictureorVideo184.jpg
http://i167.photobucket.com/albums/u159/zilvia_album/SOLD%20STUFF/PictureorVideo184.jpg

[gotta240]

Thanks for all the replies guys. No one worries about the J30 brake lines coming lose by not having those "stoppers" in the correct location? I know projectRDM says they have banjo bolts, but i dont see how those are any less likely to come lose when the wheel is turned, putting stress on the bolt. Like i say, i USE THEM and love them, but was considering having my own little "line stoppers" tacked on... Waste of time?

Also, just to clarify and for my own knowledge...

Do i have the calipers correct? J30 on right and Q45 on left?

[design240sx]

Thanks for all the replies guys. No one worries about the J30 brake lines coming lose by not having those "stoppers" in the correct location? I know projectRDM says they have banjo bolts, but i dont see how those are any less likely to come lose when the wheel is turned, putting stress on the bolt. Like i say, i USE THEM and love them, but was considering having my own little "line stoppers" tacked on... Waste of time?

Also, just to clarify and for my own knowledge...

Do i have the calipers correct? J30 on right and Q45 on left?

yes you got it right!

[UNISA JECS]

It appears your caliper on the left is from a Q45 with a wear indictor light option (atleast I think its an option) as well as maybe a traction controled equiped Q45 hence the banjo bolt mount I have no clure just guessing here but it could also be J30 by the same token not to sure haven't dealt with eitehr recently.

[projectRDM]

As long as they're a stopper to keep the brake line fitting from rotating, you're fine. It's when you use a Z32 caliper that has no retainer to secure the line that people worry about. Even then, the line won't rotate unless it's loose.

[gotta240]

Thats what i was referring to... the lack of stopper.

The j30 calipers(at least the ones i have) have the stopper in the wrong position, making it useless.

[projectRDM]

No, they both have a stopper. It's just that one had two, to hold the line securely, while the other just has one and keeps it from rotating any further. Either way, the lines does not flex or rotate unless the bolt is loose. And if so, loosing the line is going to happen anyway, plus all the fluid, so it doesn't matter at that point.

[hijack3d]

Someone said that they share pad dimensions......

There was another thread kind of like this... where a little research found that the J30's and the Q45's did not always share the same pads (but I don't know what the determining factor is)...

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HWK%2DHB326Z%2D64 6&N=700+115&autoview=sku (http://store.summitracing.com/partdetail.asp?autofilter=1&part=HWK%2DHB326Z%2D646&N=700+115&autoview=sku)

Summit lists Q45's as having the same pad dimensions as the J30's at:

5.48 in. x 2.35 in. x 0.583 in

But they also list certain Q45s as sharing the same pad dimensions as the QX4, Pathfinder, and Quest:

6.25 in. x 2.21 in. x 0.646 in.

And I'm so glad that you have both because I need a picture of the pistons for both J30 and Q45 :-D Sent PM.

[UNISA JECS]

The G50 Q45 and JPY32 J30 which happens to be the only chassis for J30 anyways should have the same front brake pad deminsions, even the FSM shows them with the same identical specs.

http://i167.photobucket.com/albums/u159/zilvia_album/SP32-20080131-105056-2.gif

[hijack3d]

Yes, the J30 has the same specs as SOME the Q45... that's true. I didn't say it wasn't.

Here's the screen/page (http://store.summitracing.com/partdetail.asp?autofilter=1&part=HWK%2DHB415F%2D583&N=700+115&autoview=sku) from Summit Racing saying J30's are the same as (some) Q45 (which I'm not and never was arguing):

http://i54.photobucket.com/albums/g102/Annie907/j30q45.gif


I said that there are OTHER specs (http://store.summitracing.com/partdetail.asp?autofilter=1&part=HWK%2DHB326Z%2D646&N=700+115&autoview=sku) for the Q45s as well. Some Q45 calipers (and I don't know the determining factor), suit a larger pad dimension. Why else would Summit Racing list the Q45 x-referencing to the QX4, Pathfinder, and Quest and not the J30? Like I said... I don't know the determining factor... But:

http://i54.photobucket.com/albums/g102/Annie907/noj30.gif

I'm not trying to be a dick or anything... and I'm certainly open to saying I'm wrong if I am, if proven so... but I don't know how else to make sense of this if not to say that not all J30's are the same as Q45's... or else the J30 would ALSO share pads from the QX4, Pathfinder, and Quest, yet Summit does not seem to think that...

[e1_griego]

I think that applies for later q45 brakes. The 94-96 q45 front calipers seem to be the same as the j30.

That's my understanding at least.

Alex

[UNISA JECS]

Ok after looking threw all 3 chassis for the Q45's front brake pads this is what I found:

Chassis / Model - pad demensions (Im not saying they use the same calipers though):

*G50 Q45 (08/89-06/96) - 5.00 x 2.20 x .374

FGY33 Q45 (07/96-01/01) - 5.20 x 2.067 x .433

*F50 Q45 (01/01-XX/XX) - 5.00 x 2.20 x .374

[sildrift86]

ummm...:-/ so which one would be best?

[sr_20]

is there a way to tell which year the calipers are from ??

[reccakun08]

recap: so other than the brackets being different the calipers are the same?

Can you use j30 brackets on q45 calipers? and viceversa?

[reccakun08]

answer my question, somebody?

Thanks.

[smelly240]

I dont think the 96-01 q45 calipers will even bolt on... 90-96 are the ones that you'd want.

I'm not 100% tho.

the brackets are the same on 94-96 q45 and j30.

[EDacIouSX]

dude, calipers even look different.. one's bigger than the other.

[reccakun08]

the brackets are the same on 94-96 q45 and j30.

This was what i was asking. Because i have j30 brackets and was going to put q45 calipers on them since apparently the q45 rotors are slightly bigger.