M50 swap that will blow your mind.

[Staszek]

Yes the tabs are for clutch line. Cut one open and put the stock clutch line to it.

I already bought mine, but also ln m52 the resevoir is on way. I'm trying to find fine that is not remote one.

Will the M52 reservoir fit directly on the E90 master? What other reservoirs are options. The ones that come with the E9X boosters are tilted.

[Noshow20x96]

Will the M52 reservoir fit directly on the E90 master? What other reservoirs are options. The ones that come with the E9X boosters are tilted.

I don’t think it’s a big deal. The shop That I do some work in, they did it and just raise the reservoir upwards to clear the tps on the throttle body. You can probably find plastic fittings at your local auto parts store, put them in the master cylinder and then run soft lines to the reservoir


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[E30335i]

Going to be doing this very soon, but on s54.


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[MWC]

Is this booster going to work the S54? Isn't there even less clearance there than with an M50 based engine?

[E30335i]

Still prepared to do small cut out on the intake box but it’s an experiment, if not, gonna do hydro boost using e28 535i/m5.


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[MWC]

Nice I've been doing a lot of research about what the best way to do it is. I'm going to be repainting the car when I do mine so modifying the firewall in some way is an option too. I wonder if it would be possible to move the booster farther back into the car if it doesn't fit.

[Noshow20x96]

I have some more made, two are already called for, will be making some more this week.

The ugly one on the right is the original one that I made by welding to pins together.


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[dude8383]

A word of caution for those that are doing this booster with a BBK up front only... if you plan to track the vehicle you will need to upgrade the rear as well otherwise you'll be going through brake pads like I did.

The 25mm master will shift the bias all the way forward on our cars if you don't match up the front calipers with something larger out back.

For reference:

https://www.r3vlimited.com/board/showthread.php?t=248323

Switching back to a stock master cylinder cured all of my issues. I have the 280x22 massive kit.

[E30_GT]

Nice set up,thanks for the write up

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[ba114]

Nice set up,thanks for the write up

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Thanks for quoting the entire post with all the pictures too... :-?

[agent]

Fixed that. ^

[KIRIEIW]

A word of caution for those that are doing this booster with a BBK up front only... if you plan to track the vehicle you will need to upgrade the rear as well otherwise you'll be going through brake pads like I did.

The 25mm master will shift the bias all the way forward on our cars if you don't match up the front calipers with something larger out back.

For reference:

https://www.r3vlimited.com/board/showthread.php?t=248323

Switching back to a stock master cylinder cured all of my issues. I have the 280x22 massive kit.

That’s really good info to know, I plan on ordering a kit from Lee myself in the next month or so. Thanks for the share dude.


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[moatilliatta]

Can anybody do a side to side comparison to the E32 735 unit?

Will E90 booster fit with an S54?

[Staszek]

Can anybody do a side to side comparison to the E32 735 unit?

Will E90 booster fit with an S54?

Give me a few months and I will let you know. I am putting the E90 unit in with my S54. I still may have to shave the plastic a bit, we will see.

[moatilliatta]

If anything, it looks significantly lighter.