yea see thats the thing I dont get. I dont think anyone makes a 38 mm rotor!! thats insanely huge!!!

 

damm dude, i just checked the legend and prelude forms and the guys there are telling me

94-95 GS sedan
or
93+ coupes.

gawd damm this crap is confusing as hell!!! First i get a caliper that needs a 38mm rotor and now this crap. Anyways I just called up a junkyard and they said they had a 94 LS 4 dr caliper so i bought those. Did the 94 LS 4 dr come w/ 2 different types of calipers or only the 2 piston type?

 

I got mines from a 94 LS sedan or something..
only the coupes come GS i believe so you might have just gotten the wrong ones to begin with, but those from the LS should befinitely be it just make sure they say 28T :fawk:

 

ok i got my calipers taken apart. I'm about to clean them on hone them, but I have no clue about the honing kit. I went to autozone to pick up the kit and it looks like all it does is home the wall on the caliper that the piston touches. If this is the case wouldn't I have to also hone the piston wall itself? What about the surface of the piston that physically touches the brake pads? Mine looks like theres a few knicks and grooves in it, would I need to get that fixed?

Also what did you use to clean the calipers/pistons? A lot fo the stuff i've read seems to be acids which would also eat metal.

 

all you need to worry about is honing the walls on the calipers, the pistons should not have any damage since they sit in the calipers if they do then you can buy new ones at www.acuraautomotiveparts.net and about the cleaning process take everything apart.. soak it in half water and simple green ( i had the concentrated kind) and just let it soak for days.. then get a wire brush and brush away ..

 

So after u dunked it for several days, did u rinse it through some water or whatever to get rid of all the simple green?

 

of course man, thats a no brainer..

 

kewl! i think i finally will have all the parts by mid next week. Figured out how to mount them right on right and left on left too!

 

When you were honing the cylinder wall, did you do it wet or dry? if wet what liquid did you apply on the cylinder wall before honing?

 

Nice, first time Ive been to Honda-Acura.net in ages. Im really surprised to see these kinds of "tech" threads instead of your typical.

So back on subject, Im not too keen on which model/year caliper you should have purchased, BUT, I wouldnt stress TOO much over the 38T vs the 28T.

What I will share with both of you is that the NSX/Legend/ITR front brake discs, share the SAME diameter. The only differences between each 3 chassis are the hub offset (NSX) and obviously the thickness. Beleive it or not the Legend and the NSX rotor are EXACTLY the same, with the exception of the HUB offset.

There is no possible way that the 38T signifies the brake disc width of 38m. Holy crap that would be like a Porsche GT3 car.

If worst comes to worst, you might have to shim the caliper bracket from the front suspension knuckle. This can be done with some washers. If you use ENOUGH washers (or shims), you might also have to use the NSX brake caliper mounting bolt. I really doubt that but if you run into that situation, opt to the NSX caliper mounting bolt.

Technically, it does matter that you switch left for right and right for left.
Here is why:

Your picture in the thread is showing the DRIVER side front brake caliper. Notice how each piston size is a DIFFERENT size. Go look at it and come back to this post......

....notice how the piston the RIGHT side piston of the caliper is larger? Correct? Now keep in mind that this is the DRIVER side caliper. If you look at a Legend, you will find the the DRIVER side brake caliper is mounted at the 12-3 oclock positions.

And on Chameleon's accord, it is mounted on the 9-12 oclock.

So, when the car is rolling FORWARD, the brake calipers COMPRESS. So when the PAD bites the rotor, the FIRST SMALLER piston will be biting along with its LARGER piston. The piston in the "BACK" (if it were to be the SAME size) would be having a hard time keeping the friction the same. So, that is why they engineered the piston in the "BACK" to have a larger diameter. So it would have an easier time pushing/compressing the pad as the front pad.

The offset size of the pistons are designed to cure BRAKE MODULATION. If both pistons were the same size, it would have uneven pad wear. The piston in the front would be doing of the work in the braking process.

Now, chameleon had SWAPPED the calipers, left for right, and right for left. He VERY well may have an easy time locking up the brakes and stopping in a better distance, but this will cause uneven brake pad wear. Significantly? Probably not TOO much but he should notice it the next time he changes his pads.

This whole post was to inform you, not to scare you. Alot of people have gone down this route to swap calipers and most of the guys I know are racing their vehicles.

Hope all this helps.

--migs