[ryanb06]

Originally Posted by dentprotony@gmail.com

I thought he meant using f80 front 4 piston calipers for the g80 rear set up. I didn’t think about 2 piston rears off f80. Availability is very limited, and the mounting is very odd , would require an extension bracket probably

Yes, I meant using the F80 rear on the G80 rear with your electronic parking brake caliper separate. Seems like the pad and brake bias might be similar if using the F80 rear.

I might buy a new set of F80 rear calipers and test it out.

[dentprotony@gmail.com]

Originally Posted by ryanb06

Yes, I meant using the F80 rear on the G80 rear with your electronic parking brake caliper separate. Seems like the pad and brake bias might be similar if using the F80 rear.

I might buy a new set of F80 rear calipers and test it out.

Yes, availability and cost of the f80 calipers would be a challenge for me, i am used to selling 1-2 brake sets a week per platform (f85/f10/e70(f15) etc. it would immediately affect my production because i buy 19z sets in bulk 6-7 full sets at a time hence i get a good price on them, this wont be the case for f80 units. Definitely let us know if you can make f80 caliper fit and post some pictures, thanks !

[nick///M3]

It can be done. At least for the carbon setup

I have zero info though besides that it's a g81 in the photo.

I am also trying to find more on this

[dentprotony@gmail.com]

Originally Posted by nick///M3

It can be done. At least for the carbon setup

I have zero info though besides that it's a g81 in the photo.

I am also trying to find more on this

That seems to be a gt4 caliper, same as used on m2 competition ccb , these calipers are made to work with 28mm rotor I believe , also see how far the pad sits on the disc, there gotto be a wider pad to use more rotor area im sure.

[KingKairo]

Would you sell just EPB & mounting hardware as I would like to use the F80 Rear Ceramic Calipers?

[M3SQRD]

Originally Posted by KingKairo

Would you sell just EPB & mounting hardware as I would like to use the F80 Rear Ceramic Calipers?

Is this for g8x CCB or iron brake setup?

The f87 M2C 4-p caliper is identical to the f8x CCB 4-p caliper, correct? Trying to understand the pad options available for this caliper.

[dentprotony@gmail.com]

Originally Posted by M3SQRD

Is this for g8x CCB or iron brake setup?

The f87 M2C 4-p caliper is identical to the f8x CCB 4-p caliper, correct? Trying to understand the pad options available for this caliper.

Check rotor thickness that they are made to work with, they are significantly wider, might need spacers for pads.

[M3SQRD]

Originally Posted by dentprotony@gmail.com

Check rotor thickness that they are made to work with, they are significantly wider, might need spacers for pads.

That’s where I was ultimately headed with this check but before saying anything I wanted to make sure I had the correct information. I was thinking there’s a not insignificant difference in rotor thicknesses. I’m not an expert on CCB rotor thickness and f87 2NH rotor thickness. I had the blue iron setup but converted to Essex/AP Racing early on. F8x CCB or f87c iron rear rotors are significantly thicker than g8x iron rear rotor. On paper it’s easy to pick out any caliber to work with any diameter rotor(s). Many try, most fail for many different reasons.

Also, you’re supposed to have existing caliper mounting brackets available for any caliper and any rotor (diameter, rotor offset and thickness) for any application. Most creators of retrofit kits don’t care, or don’t understand, the radial pad offset and maximizing swept area is important. There’s an extremely poorly designed kit (two actually) floating around on the e9x forum right now. From incorrect piston areas, to poor radial placement, to rotors hitting calipers…yet people buy these kits without asking basic questions such as where to purchase replacement rotors, what pad shapes/numbers are used and availability…

[dentprotony@gmail.com]

Originally Posted by M3SQRD

That’s where I was ultimately headed with this check but before saying anything I wanted to make sure I had the correct information. I was thinking there’s a not insignificant difference in rotor thicknesses. I’m not an expert on CCB rotor thickness and f87 2NH rotor thickness. I had the blue iron setup but converted to Essex/AP Racing early on. F8x CCB or f87c iron rear rotors are significantly thicker than g8x iron rear rotor. On paper it’s easy to pick out any caliber to work with any diameter rotor(s). Many try, most fail for many different reasons.

Also, you’re supposed to have existing caliper mounting brackets available for any caliper and any rotor (diameter, rotor offset and thickness) for any application. Most creators of retrofit kits don’t care, or don’t understand, the radial pad offset and maximizing swept area is important. There’s an extremely poorly designed kit (two actually) floating around on the e9x forum right now. From incorrect piston areas, to poor radial placement, to rotors hitting calipers…yet people buy these kits without asking basic questions such as where to purchase replacement rotors, what pad shapes/numbers are used and availability…

Could you send me a link to these e90 kits you mentioned, id love to see what they are up to, i am actually considering getting e90 set built for possibly 18” wheels using f80 rotors, but ran into a few light issues , still getting there sooner than later though

[KingKairo]

Originally Posted by M3SQRD

Is this for g8x CCB or iron brake setup?

The f87 M2C 4-p caliper is identical to the f8x CCB 4-p caliper, correct? Trying to understand the pad options available for this caliper.

I would be using it for the G80 CCB.

[M3SQRD]

Originally Posted by KingKairo

I would be using it for the G80 CCB.

If the g80 CCBs are identical to the f80 CCBs (I believe they’re identical in diameter) and the 1-p sliding caliper is the same as the one used with the iron brake setup. So the f80 4-p caliper has a ~19% smaller piston area than the g80 1-p sliding caliper. This shifts the g80 CCB brake bias forward to 67.6%.

[M3SQRD]

Originally Posted by dentprotony@gmail.com

Could you send me a link to these e90 kits you mentioned, id love to see what they are up to, i am actually considering getting e90 set built for possibly 18” wheels using f80 rotors, but ran into a few light issues , still getting there sooner than later though

Here you go:
https://www.m3post.com/forums/showthread.php?t=2084837

[ginohhh]

The question is do we need ISTA to bleed the brakes? Or can we just use a motive bleeder? I heard you can’t bleed the g80/82 using the traditional 2 man method cuz it throws all sorts of code.