E9X N55 Built Motor

[Zebaztian7]

This looks great!! Can't wait to see results on this

 

[bahn]

Awesome build, cool to see the N55's getting some love.

 

[boostE92d]

Very cool, to say the least.

 

[ap485]

This looks great!! Can't wait to see results on this

Awesome build, cool to see the N55's getting some love.

Very cool, to say the least.

Thanks guys!

 

[ap485]

Update!

I got the numbers on the heads. Huge gains after porting.

How does that look?

Still a lot to do but, the motor is almost finished.

 

[doublespaces]

Very nice! I would really love to do a built motor once all the misfire/knock is figured out.

 

[ap485]

Very nice! I would really love to do a built motor once all the misfire/knock is figured out.

Fingers crossed! I will not have any issues related to that.

 

[ap485]

Finally counting days to get my car back.

 

[doublespaces]

So, I wonder how the Big Boost and Speedtech kits compare in terms of install...

 

[ap485]

So, I wonder how the Big Boost and Speedtech kits compare in terms of install...

If I'm not mistaken, the only difference is the water pump installation because the turbo sits lower and the turbo housing is bigger on the Speedtech kit. So, the water pump needs to move forward. However, the water pump remains in the stock position on the Bigboost kit.

 

[Rob09msport]

I was able to get a pd setup and was told that I could still send my transmission in

 

[ap485]

I was able to get a pd setup and was told that I could still send my transmission in

You are very lucky!

 

[ap485]

A few more pictures before the motor/trans goes back in the car.

More to come

 

[Sbrach]

Who is tuning it?

 

[Twisted Tuning]

A few more pictures before the motor/trans goes back in the car.

View attachment 12443

View attachment 12444

More to come

looking great man.

 

[switlikbob]

looking great man.

Any updates? Link to all work and parts used on just the engine build? I'm curious about pistons / rods, new compression ratio, different head gasket / cut ring, valvetrain mods, etc...

I'm probably going to do some kind of build with N55 from my M2, but I am wondering what the differences are between my engine and a standard N55. Rumor was there are s55 internals, but I have yet to see any confirmation. I'm hoping to do a docrace turbo kit. I just don't know if I should build motor first, or let it pop on its own.

 

[Twisted Tuning]

Any updates? Link to all work and parts used on just the engine build? I'm curious about pistons / rods, new compression ratio, different head gasket / cut ring, valvetrain mods, etc...

I'm probably going to do some kind of build with N55 from my M2, but I am wondering what the differences are between my engine and a standard N55. Rumor was there are s55 internals, but I have yet to see any confirmation. I'm hoping to do a docrace turbo kit. I just don't know if I should build motor first, or let it pop on its own.

Engine difference is the crank. Forged vs cast. All else is the same pretty much. Over 650whp do rods and pistons.

 

[switlikbob]

Engine difference is the crank. Forged vs cast. All else is the same pretty much. Over 650whp do rods and pistons.

Thanks. I was told that the f87 n55 has the s55 rods & pistons. I trust you know what you're talking about, so thanks for this info. Would weisco pistons and eagle rods work? If not, what are good options for 800-900 rwhp?

 

[9krpmrx8]

All N55's and the S55 have the same rods. M135, M235, and other E/F series N55 except M2 have the same pistons.


As for the N55's with the forged crank, here:

Part 11217602972 was found on the following vehicles:

1' F20   (04/2011 — 02/2015)

1' F20 LCI   (06/2014 — 06/2016)

1' F21   (12/2011 — 02/2015)

1' F21 LCI   (06/2014 — 06/2016)

2' F22   (10/2012 — 06/2016)

2' F87 M2   (11/2014 — 06/2017)

2' F87 M2 LCI   (09/2016 — 06/2018)

2' F23   (03/2014 — 06/2016)

7' F02 LCI   (05/2011 — 05/2015)

X4 F26   (11/2014 — 03/2018)

MS BMW Motorsport   ( — )

 

[switlikbob]

All N55's and the S55 have the same rods. M135, M235, and other E/F series N55 except M2 have the same pistons.


As for the N55's with the forged crank, here:

Part 11217602972 was found on the following vehicles:

1' F20   (04/2011 — 02/2015)

1' F20 LCI   (06/2014 — 06/2016)

1' F21   (12/2011 — 02/2015)

1' F21 LCI   (06/2014 — 06/2016)

2' F22   (10/2012 — 06/2016)

2' F87 M2   (11/2014 — 06/2017)

2' F87 M2 LCI   (09/2016 — 06/2018)

2' F23   (03/2014 — 06/2016)

7' F02 LCI   (05/2011 — 05/2015)

X4 F26   (11/2014 — 03/2018)

MS BMW Motorsport   ( — )

Thank you for that info. With that being said, can I get some advice regarding the proper recipe to build my F87 N55 for 800rwhp?

Seriously, what's the goal? What's the weak spot? Lower compression, cut ring head gasket, beefier rods, billet pistons?