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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > F30 Performance brakes in E92 335i



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      01-17-2018, 12:14 PM   #1189
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Quote:
Originally Posted by Kevin_The_Clean1 View Post
Maybe it's simply the offset that's the issue. I have a squared set of style 219 wheels. But they are meant for the E90 M3 front end...
Squared rears? Those would be 9.5s with a mid 20 offset. Ya I cant see those fitting under stock fenders lol
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      01-17-2018, 12:32 PM   #1190
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Quote:
Originally Posted by neilvan View Post
Squared rears? Those would be 9.5s with a mid 20 offset. Ya I cant see those fitting under stock fenders lol
No. Says front and those are 8.5. Anyhow this is a brake thread.
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      01-26-2018, 02:34 PM   #1191
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Hi Guys I just finished the conversion
with the m performance BMW brembo Calipers 370mm discs front, 345 rear.
I also replaced master cylinder with e92 m3 unit & fitted ECS stainless lines, have Bled Calipers.. no leaks & took for a test drive..
no brake bite, poor pedal bite, pressure feels weak/ braking power no good.
Pedal doesnt feel spongy you just have to push really hard on brakes now to get sufficient response.. like what happens when discs are wet & you it brakes
I am a bit concerned.. any ideas what the issue could be?
I have new discs but still kept the original pads that were in the calipers for now ..so maybe this uneven connection is a problem till they bed in.
but I didnt expect it to be this poor .
I am also wondering if air in the abs unit would cause this?
Brakes bleed seemed to go ok so I wanted to get some feedback asap.
hopefully a solution comes soon
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      01-26-2018, 03:31 PM   #1192
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Quote:
Originally Posted by automods bmw View Post
Hi Guys I just finished the conversion
with the m performance BMW brembo Calipers 370mm discs front, 345 rear.
I also replaced master cylinder with e92 m3 unit & fitted ECS stainless lines, have Bled Calipers.. no leaks & took for a test drive..
no brake bite, poor pedal bite, pressure feels weak/ braking power no good.
Pedal doesnt feel spongy you just have to push really hard on brakes now to get sufficient response.. like what happens when discs are wet & you it brakes
I am a bit concerned.. any ideas what the issue could be?
I have new discs but still kept the original pads that were in the calipers for now ..so maybe this uneven connection is a problem till they bed in.
but I didnt expect it to be this poor .
I am also wondering if air in the abs unit would cause this?
Brakes bleed seemed to go ok so I wanted to get some feedback asap.
hopefully a solution comes soon
It sounds like you have air. Bleed it again and use the power bleeding process via bmw standard tools. It's described in this thread a number of times.
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      01-29-2018, 07:30 PM   #1193
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Quote:
Originally Posted by automods bmw View Post
Hi Guys I just finished the conversion
with the m performance BMW brembo Calipers 370mm discs front, 345 rear.
I also replaced master cylinder with e92 m3 unit & fitted ECS stainless lines, have Bled Calipers.. no leaks & took for a test drive..
no brake bite, poor pedal bite, pressure feels weak/ braking power no good.
Pedal doesnt feel spongy you just have to push really hard on brakes now to get sufficient response.. like what happens when discs are wet & you it brakes
I am a bit concerned.. any ideas what the issue could be?
I have new discs but still kept the original pads that were in the calipers for now ..so maybe this uneven connection is a problem till they bed in.
but I didnt expect it to be this poor .
I am also wondering if air in the abs unit would cause this?
Brakes bleed seemed to go ok so I wanted to get some feedback asap.
hopefully a solution comes soon
I don't think air.
Air doesn't give you a stiffer pedal. Air gives you a spongy pedal.
How man times did you bleed?
Did you hit the caliper with a rubber mallet to dislodge all the bubbles?
Did you rough up the pads as they were not new?
Did you bed them in with the correct procedure?

I think the pads need to be roughed up and bedded on the new rotors.
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      01-29-2018, 08:04 PM   #1194
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Quote:
Originally Posted by techwhiz View Post
Quote:
Originally Posted by automods bmw View Post
Hi Guys I just finished the conversion
with the m performance BMW brembo Calipers 370mm discs front, 345 rear.
I also replaced master cylinder with e92 m3 unit & fitted ECS stainless lines, have Bled Calipers.. no leaks & took for a test drive..
no brake bite, poor pedal bite, pressure feels weak/ braking power no good.
Pedal doesnt feel spongy you just have to push really hard on brakes now to get sufficient response.. like what happens when discs are wet & you it brakes
I am a bit concerned.. any ideas what the issue could be?
I have new discs but still kept the original pads that were in the calipers for now ..so maybe this uneven connection is a problem till they bed in.
but I didnt expect it to be this poor .
I am also wondering if air in the abs unit would cause this?
Brakes bleed seemed to go ok so I wanted to get some feedback asap.
hopefully a solution comes soon
I don't think air.
Air doesn't give you a stiffer pedal. Air gives you a spongy pedal.
How man times did you bleed?
Did you hit the caliper with a rubber mallet to dislodge all the bubbles?
Did you rough up the pads as they were not new?
Did you bed them in with the correct procedure?

I think the pads need to be roughed up and bedded on the new rotors.
If the pedal is harder with less retardation then it may be a vacuum leak on the booster
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      01-31-2018, 04:35 AM   #1195
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do the f80 380mm discs fit on an e92? with the m perfromance 370mm caliper
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      01-31-2018, 07:31 AM   #1196
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Quote:
Originally Posted by OTN55 View Post
do the f80 380mm discs fit on an e92? with the m perfromance 370mm caliper
No.
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      01-31-2018, 05:34 PM   #1197
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Quote:
Originally Posted by feuer View Post
Quote:
Originally Posted by OTN55 View Post
do the f80 380mm discs fit on an e92? with the m perfromance 370mm caliper
No.
thankyou. i kinda thought it would not
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      01-31-2018, 06:15 PM   #1198
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Quote:
Originally Posted by OTN55 View Post
Quote:
Originally Posted by feuer View Post
Quote:
Originally Posted by OTN55 View Post
do the f80 380mm discs fit on an e92? with the m perfromance 370mm caliper
No.
thankyou. i kinda thought it would not
They would if you made custom brackets and there's a 1 addicts thread that talks about what's required.
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      02-01-2018, 04:45 AM   #1199
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Quote:
Originally Posted by automods bmw View Post
Hi Guys I just finished the conversion
with the m performance BMW brembo Calipers 370mm discs front, 345 rear.
I also replaced master cylinder with e92 m3 unit & fitted ECS stainless lines, have Bled Calipers.. no leaks & took for a test drive..
no brake bite, poor pedal bite, pressure feels weak/ braking power no good.
Pedal doesnt feel spongy you just have to push really hard on brakes now to get sufficient response.. like what happens when discs are wet & you it brakes
I am a bit concerned.. any ideas what the issue could be?
I have new discs but still kept the original pads that were in the calipers for now ..so maybe this uneven connection is a problem till they bed in.
but I didnt expect it to be this poor .
I am also wondering if air in the abs unit would cause this?
Brakes bleed seemed to go ok so I wanted to get some feedback asap.
hopefully a solution comes soon
How did you bleed the system after? Pressure bleeder at least? Did you also use a scanner to activate the DSC pump and valves?

If the pedal travel/stroke is similar to stock but the pedal is hard to press to achieve the same stroke, you have vacuum supply issue.
If the stroke is similar to stock and the foot pressure required is similar to stock but brakes are weak like you say, I think you just need to bed them in properly.
Since you fitted used pads to new discs, this will take even longer.

I suggest new pads and bedding properly if you are 100% confident in your bleeding procedure.
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      02-07-2018, 10:10 AM   #1200
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so for the front calipers to fit with my 19 inch 313s i need spacers?
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      02-07-2018, 10:31 AM   #1201
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Quote:
Originally Posted by OTN55 View Post
so for the front calipers to fit with my 19 inch 313s i need spacers?
To be safe I went with a 3mm spacer up front with my 313's. It was just too tight without one.
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      02-07-2018, 04:02 PM   #1202
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also i noticed the m logo on the calipers one is facing the other way foe some reason, when i got them repainted i got them done facing the same qay, does it natter which caliper goes on which side?
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      02-07-2018, 05:46 PM   #1203
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Originally Posted by OTN55 View Post
also i noticed the m logo on the calipers one is facing the other way foe some reason, when i got them repainted i got them done facing the same qay, does it natter which caliper goes on which side?
As long as the bleed nipple ends up at the top they should be fine. Some callipers have different size pistons depending on direction of travel but f30/f80 ones do not.
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      02-08-2018, 11:05 AM   #1204
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What method(s) do you use to enlarge the caliper bolt hole on the knuckle.?
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      02-08-2018, 11:24 AM   #1205
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Quote:
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What method(s) do you use to enlarge the caliper bolt hole on the knuckle.?
.
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      02-08-2018, 01:02 PM   #1206
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Originally Posted by peterparker View Post
What method(s) do you use to enlarge the caliper bolt hole on the knuckle.?


With a couple cobalt 1/2" drill bits. They dull fairly quick, and one of these https://www.mcmaster.com/#rotary-deb...tools/=1bheyae The long shank can come in handy shaping the hole outwards.
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      02-10-2018, 05:22 AM   #1207
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hi guys gor my fronts all painted, just curious to know... will an e82 135 rear 2 pot caliper bolt straight onto a e92 335i hub and disc?
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      02-10-2018, 11:11 AM   #1208
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hi guys gor my fronts all painted, just curious to know... will an e82 135 rear 2 pot caliper bolt straight onto a e92 335i hub and disc?
No, it's not plug and play. It's possible but not easy. Feuer would know the details if anyone would.
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      02-10-2018, 01:00 PM   #1209
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Can anyone confirm if the 19" 313 rims will clear the 340mm F20 brakes at the front? I assume so just wanted to check. My MV4 wheels are buckled.
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      02-10-2018, 05:41 PM   #1210
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Quote:
Originally Posted by OTN55 View Post
hi guys gor my fronts all painted, just curious to know... will an e82 135 rear 2 pot caliper bolt straight onto a e92 335i hub and disc?
caliper need 1-2mm spacer in order to be centered on the rotor.
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