M50 swap that will blow your mind.

Yes, I said it. This thread that I’m putting up will blow your mind. I’m not going to start this off with a story about my car and the life it went through. I’m going right in to it. I’m using a booster that’s not 30 years old....... 🤯 I’m using a booster from a e92 and this is about how I made it work.

So I was doing some research on here and everyone is using some old pos booster that is 1 expensive and 2 way to much work to make it fit (in my opinion)

Someone on here was mentioning about sizes of boosters and the e9x one came up. 10” in size. So I kept that in mind. Was search on eBay for boosters and all the ones that people use for this swap was so expensive, $200 $400 $600. Like out of this world prices. The e92 booster came up, comes with master, reservoir, lines and gasket. Looked a bit weird but it looked like it would fit. At the price of $50 I said fuk it let’s try it and if it doesn’t fit, it was $50.

Now, a couple days later go by and I received the booster. Looks good, No damage at all, no signs of leaks. Now I’m comparing to the old 27 year old booster. The studs that goes through the firewall look the same. Missing two but it will work. So I put it in the firewall and goes right in. The lines for the master are on the other side. No big deal. Go take a look to see where the pedal lines up and guess what. Right on the money. Now I’m seeing the pin that puts them together has to be longer. So I made one.

Now it’s bolted up.

So now I’m testing things. I put the brake lines on the master, the e9x master is a 12x1 compared to the old master that is 10x1. E39 has brake fittings that are 3/16 hole but 12x1 thread. So I Bubble flared it and was done with that. You can also find the brake fittings at your local auto parts store.

Now the lines are done. Pedal to the rod is done. Now to test if the engine will fit and it did. With minor issues but 1/2 clearance from the intake manifold to the booster. The brake reservoir is hitting the TPS. so I took a e34 530/540i remote reservoir and clutch reservoir and put it in the car. You can also raise the reservoir with some modifications and clear the TPS. Now to test if the engine vacuum will Work with this booster, I’m doing this because e9x use a mechanical vacuum pump. So I did and OMG. that nasty, spongy, old brake pedal is gone. I mean, it feels like a brand new car brake pedal.

I also want to mention that this will also Work great with the stock m20, m10 or m42 maybe even the s14 it could probably work with a s54 swap to.

Now I hope that this can be Another option for you guys and I hope that you guys don’t jack up the prices of the booster. There is no reason for it.

If you guys have any questions or need any help, hit me up here or give us a call at globo auto in south river NJ

Here is a update with all the parts that you will need to do this
Find the other parts at fcpeuro.com

E9x booster (find on eBay)

Clevis pin (I custom make them)

Brake fittings 12x1 3/16 I.D

Bmw brake master reservoir grommets x2

Bmw brake hose connector x2

Bmw hydraulic hose x2

Bmw brake fluid reservoir x1

Thank you razo-s.supra for finding the parts
Here is his setup

Here is a little background of the build and some pictures.

1987 bmw 325e 164,000
M50B25 nv 136,000
ZF 320 trans 180,000
JB lighten flywheels 240 mm
95 m3 clutch kit stage two 240 mm
ZHP shifter
Condor tall weighted shift knob
E driveshaft
3.73 LSD
Fortune 510 coilovers with swift springs 14k front 18k rear
RX7 FC brake kit front
Stock brakes in the rear
I made 3/4” spacers for raise the motor above the subframe
RED46 m30 skid plate
E90 335i booster
E34 remote brake and clutch reservoir.
Turner overdrive pulleys
Reseal engine
Removable radiator support
Z3 radiator
Spal pusher fan 2100 cfm
Mishimoto Radiator hoses
325is coolant reservoir
Fully custom exhaust with v-bands, true dual with x-pipe and borla muffler 2.25 diameter
Turner ecu chip
Wired x20 connector
Reinforced front subframe
E46 m3 rack and pinion
16x9 +15 Schmidt modern lines with 225/40R16
Probably some more stuff that I’m forgetting

Added photos

Rx7 brakes are awesome with this booster

Sent from my iPhone using Tapatalk Pro

M50 swap that will blow your mind.

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M50 swap that will blow your mind.