Differences in N55 between E series cars and F series cars

[Frostydc4]

Whats the difference (engine internals and turbo) between the N55 applications in the E series cars and the F series cars? Thanks!

 

[Joe]

"The N55 in the F22 M235i has three enhancements over the normal N55.

1. Software update
2. Revised camshaft
3. Revised exhaust"

- The Internet

Also, the ECU is different. E series can be flashed via MHD. F series requires a one time unlock and then can be flashed with bootmod3.

 

[Joe]

"The N55 in the F22 M235i has three enhancements over the normal N55.

1. Software update
2. Revised camshaft
3. Revised exhaust"

- The Internet

Also, the ECU is different. E series can be flashed via MHD. F series requires a one time unlock and then can be flashed with bootmod3.

Also... https://www.google.com/url?sa=t&sou...wNXcAE4jIw0j0H9yQ&sig2=xl3Zje2mPajxNVsOq2B9ow

 

[Frostydc4]

Thanks.

 

[Bnks334]

That is the pdf for the n55 in the e-series.

I'm sure bmw Academy (where the pdfs were sourced from) has since produced another n55 pdf for the F series that outlines the engineering improvements over the outgoing e-series n55.

There are probably many more technical differences between the engines. Just like how people think n54 and n55 are the same engine yet they are technically 2 completely different animals.

Also... https://www.google.com/url?sa=t&source=web&rct=j&url=http://f15.bimmerpost.com/forums/attachment.php?attachmentid=1237050&d=1435890258&ved=0ahUKEwjxz9Lu3-zQAhUoj1QKHRAHDEgQFggaMAA&usg=AFQjCNF1BNNSzCz2WwNXcAE4jIw0j0H9yQ&sig2=xl3Zje2mPajxNVsOq2B9ow

 

[Joe]

That is the pdf for the n55 in the e-series.

I'm sure bmw Academy (where the pdfs were sourced from) has since produced another n55 pdf for the F series that outlines the engineering improvements over the outgoing e-series n55.

There are probably many more technical differences between the engines. Just like how people think n54 and n55 are the same engine yet they are technically 2 completely different animals.

The PDF references both M0 and O0 models of the N55... Both of which found themselves in several F series cars.

 

[Flinchy]

"The N55 in the F22 M235i has three enhancements over the normal N55.

1. Software update
2. Revised camshaft
3. Revised exhaust"

- The Internet

Also, the ECU is different. E series can be flashed via MHD. F series requires a one time unlock and then can be flashed with bootmod3.

Close

Only the 2011 e series can be flashed. The rest need a bench unlock just the same.

 

[Martial@MHD]

There are more differences. M135i-235i have a forged crankshaft. M2 (n55to) has m4 internals.

As for DME, some early F 535i should be directly OBD flashable. The rest will be taken care of later this year.

 

[Frostydc4]

Is the turbo on the E8/E9x cars and the M135/M235 the same?

 

[Cjdzombie]

I read that the newer N55s have and the M cars have a bigger turbo..

 

[niceast]

2011 e82 n55 have different fuel pumps than late-n55 2012+
(2011 shares same Hpfp as n54 2007-2010 but never got the extended warranty to 100k/10yrs under service bulletin 130309, who know why its was overlooked... *scream)

Video of Hpfp @ 4:10 by fcpeuro "n55 problems"