[Abax335]

Ok cool. Do you have any measured performance gains from this set up ?

[feuer]

Originally Posted by Abax335

extra vacuum pump" sorry. touchy today aren't we. Just trying to let him know in case he was unaware that it exist, its's not common knowledge ....but it may be worth taking a look at since he is trying to do a retrofit of a master cylinder that works with a booster that utilizes it.

The pump is not the actual booster which is the drum and in this case identical in both M and non M. That means the pump is simply to create vacuum which also is identical in both M and non M. Only the vacuum source is different and that is mainly due to the big high revving V8.

Do we have measurable gains? I assume you mean whether we have measured the difference with special tools and gauges.

Answer is no.

However, how both setups perform is rather obvious.

Not all great results were achieved scientificly per say, although research, trial, error and success could be all considered as scientific methods.

Since the consensus among enthusiast that have done this "experiment " is that the setup works and has been tested on the street and track (in my case 2 years now) and we don't have any claims supporting the opposite we could all agree is beneficial especially if you have upgraded larger calipers.

[rob1024]

Originally Posted by feuer

The pump is not the actual booster which is the drum and in this case identical in both M and non M. That means the pump is simply to create vacuum which also is identical in both M and non M. Only the vacuum source is different and that is mainly due to the big high revving V8.

Do we have measurable gains? I assume you mean whether we have measured the difference with special tools and gauges.

Answer is no.

However, how both setups perform is rather obvious.

Not all great results were achieved scientificly per say, although research, trial, error and success could be all considered as scientific methods.

Since the consensus among enthusiast that have done this "experiment " is that the setup works and has been tested on the street and track (in my case 2 years now) and we don't have any claims supporting the opposite we could all agree is beneficial especially if you have upgraded larger calipers.

Great info. Totally agree here

[R99]

Does anyone have the TRW part number for the M3 master cylinder?

I've tried searching, but I can't find it!

I'm hoping it may be like the M3 arms where you can buy the same parts, but just cheaper!

[Aus335iguy]

Originally Posted by R99

Does anyone have the TRW part number for the M3 master cylinder?

I've tried searching, but I can't find it!

I'm hoping it may be like the M3 arms where you can buy the same parts, but just cheaper!

I was looking for this exact thing myself ! I haven't been able to find an aftermarket one. I believe ATE make it and I have the catalogue but haven't had time to sift on my phone

I need a RHD one and the part number oem is 34312283534 LHD number ends in 3

I have found that the 5/6 series is 27/22 vs 26/22 for m3 and 335i is 25/22.

Have a look at https://www.ebay.com.au/itm/332105463180

[R99]

I too need a RHD one!

[Aus335iguy]

Originally Posted by R99

I too need a RHD one!

There was one in your neck of the woods recently but the guy wasn't sure if it was from an M or not even though he advertised it as that. :

[R99]

Yeh that's the problem! I don't want to end up buying exactly the same cylinder as the one I already have!!

[Aus335iguy]

Originally Posted by R99

Yeh that's the problem! I don't want to end up buying exactly the same cylinder as the one I already have!!

I asked the gent to take a photo but he hasn't sent it through yet.

[Aus335iguy]

Originally Posted by R99

Yeh that's the problem! I don't want to end up buying exactly the same cylinder as the one I already have!!

I pulled the trigger on the bigger one. See how it all goes eh?

[DR-JEKL]

Originally Posted by Aus335iguy

I pulled the trigger on the bigger one. See how it all goes eh?

Did you do the swap yet?

I bought a RHD M3 master last year from the UK (I have M3 driveline & brakes on my 335i) and am going to do the swap tomorrow with the assistance of titium

I found at high speeds the brake pedal was spongey with the 335i master (as it was well reported on the forums that you need to swap the master also)

[Aus335iguy]

Originally Posted by DR-JEKL

Did you do the swap yet?

I bought a RHD M3 master last year from the UK (I have M3 driveline & brakes on my 335i) and am going to do the swap tomorrow with the assistance of titium

I found at high speeds the brake pedal was spongey with the 335i master (as it was well reported on the forums that you need to swap the master also)

No not yet

[juld0zer]

Originally Posted by DR-JEKL

Did you do the swap yet?

I bought a RHD M3 master last year from the UK (I have M3 driveline & brakes on my 335i) and am going to do the swap tomorrow with the assistance of titium

I found at high speeds the brake pedal was spongey with the 335i master (as it was well reported on the forums that you need to swap the master also)

I hate to be the bearer of bad news but i have a feeling there is some sort of software restriction which affects brake pedal feel. This is something that not even an M3 master will fully cure.

Did you code your car and add SPBR? (I dont even think it would yield a good result because the 335i was not advertised as being suitable for the 6/2 pot Brembo BMW Performance brake kit - as we all know it has a superior front brake). Adding SPBR to your VO after upgrading to Brembo F30 calipers is supposed to bring brake pedal feel to a satisfactory level.

Just to be clear, your pedal has long travel but weak response at high speed? What happens when you press harder? (Not stomping, just pressing harder)? Does the retardation increase with pedal pressure?

What I am thinking is that since your M3 brakes have larger pistons, they require more fluid to operate. Your 335i master is matched to the smaller diameter stock pistons. You might get what you are after with an M3 master but i reckon you'll be in the same boat as me - there is still something holding us back from truly amazing brakes with the response of the stock 335i setup but durability and fade resistance of a BBK.

[DR-JEKL]

Originally Posted by juld0zer

I hate to be the bearer of bad news but i have a feeling there is some sort of software restriction which affects brake pedal feel. This is something that not even an M3 master will fully cure.

Did you code your car and add SPBR? (I dont even think it would yield a good result because the 335i was not advertised as being suitable for the 6/2 pot Brembo BMW Performance brake kit - as we all know it has a superior front brake). Adding SPBR to your VO after upgrading to Brembo F30 calipers is supposed to bring brake pedal feel to a satisfactory level.

Just to be clear, your pedal has long travel but weak response at high speed? What happens when you press harder? (Not stomping, just pressing harder)? Does the retardation increase with pedal pressure?

What I am thinking is that since your M3 brakes have larger pistons, they require more fluid to operate. Your 335i master is matched to the smaller diameter stock pistons. You might get what you are after with an M3 master but i reckon you'll be in the same boat as me - there is still something holding us back from truly amazing brakes with the response of the stock 335i setup but durability and fade resistance of a BBK.

Hmm TBH I had vtl code the car after M3 driveline install (He removed ediff and the brakefade feature) but AFAIK no the car hasn't been coded with SPBR. I must admit I'm a total amateur with coding and have NFI what SPBR is or what it could possibly do for me

As for the pedal feel, it just feels doughy/wooden. Best way I can describe it is that it feels difficult to modulate and doesn't inspire confidence. Come into a corner at high speed and start braking at moderate levels and you don't get that feedback through the pedal where you can feel the car pulling up.

I'm using stoptech street performance pads (stoptech S/S line and motul RBF600 fluid) but before I had done the M3 driveline retrofit I had heard of other owners stating they had noticed issues regarding pedal feel and the M3 master had help resolved their issues.

Hopefully by this time tomorrow I'll have an answer for you to see if it helped as much as I hoped it would

[feuer]

Originally Posted by DR-JEKL

Did you do the swap yet?

I bought a RHD M3 master last year from the UK (I have M3 driveline & brakes on my 335i) and am going to do the swap tomorrow with the assistance of titium

I found at high speeds the brake pedal was spongey with the 335i master (as it was well reported on the forums that you need to swap the master also)

What brake retrofit you have exactly? E9x M3 or something else?

[Smokey33]

Meh. Been running F20 135i 4 pots fronts now for about 6 weeks on my E92 335i. Brake feel and bite is fantastic. Whats the point in the M3 master cylinder.......Just do the fronts.

[juld0zer]

Originally Posted by Smokey33

Meh. Been running F20 135i 4 pots fronts now for about 6 weeks on my E92 335i. Brake feel and bite is fantastic. Whats the point in the M3 master cylinder.......Just do the fronts.

Don't the 335i stock brakes have better initial bite and cold bite? Even the F20/F30 owners complained about their stock brakes.

[juld0zer]

Originally Posted by DR-JEKL

Hmm TBH I had vtl code the car after M3 driveline install (He removed ediff and the brakefade feature) but AFAIK no the car hasn't been coded with SPBR. I must admit I'm a total amateur with coding and have NFI what SPBR is or what it could possibly do for me

As for the pedal feel, it just feels doughy/wooden. Best way I can describe it is that it feels difficult to modulate and doesn't inspire confidence. Come into a corner at high speed and start braking at moderate levels and you don't get that feedback through the pedal where you can feel the car pulling up.

I'm using stoptech street performance pads (stoptech S/S line and motul RBF600 fluid) but before I had done the M3 driveline retrofit I had heard of other owners stating they had noticed issues regarding pedal feel and the M3 master had help resolved their issues.

Hopefully by this time tomorrow I'll have an answer for you to see if it helped as much as I hoped it would

SPBR is the parameter for the 6 pot/2 pot BMW Performance brake kit intended for non N54/N55 models.

I think your feedback mirrors my experience. M3s and 1Ms have this particular feel to them. Put your foot down on either pedal and you get what you expect with great linear response.

[DR-JEKL]

Originally Posted by feuer

What brake retrofit you have exactly? E9x M3 or something else?

OEM E9X M3 brakes on my 335i

[DR-JEKL]

Originally Posted by juld0zer

SPBR is the parameter for the 6 pot/2 pot BMW Performance brake kit intended for non N54/N55 models.

I think your feedback mirrors my experience. M3s and 1Ms have this particular feel to them. Put your foot down on either pedal and you get what you expect with great linear response.

Oh OK thanks! I may ask Vince next time he's coding my car to see what he thinks re SPBR

Massive thanks to titium for doing the master cylinder swap and full brake flush. We gave up getting the oem 335i brake booster out to swap for the 'fresher' brake booster that came with the M3 master cylinder (my car is an 06 build master cylinder is 2011 build)

I think brake pedal feel has improved but need more time to evaluate it (I'm dog tired after 5-6 hrs of driving and a busy day)

[feuer]

Originally Posted by DR-JEKL

OEM E9X M3 brakes on my 335i

Did you retrofit the suspension too? As far as I know M brakes don't mount on non M uprights/knuckles.

[juld0zer]

Booster and master can be fitted together. But removing the booster requires removing the master first. Just one of those situations where going home feels quicker than going there lol

Booster would've just been another 5 mins