EverythingBmwpro is that you?

So the block, pistons, crank, turbo's, manildfolds, etc are all different. So how the hell are 75% of the components shared??

If only the engineers had figured out how to put in a key-way or pin hole into the crankshaft on the S55. Lol

I'm sticking to the n55

I have an m4 competition..I can tell you for a fact the s55 rips! Id say reliable too. Ive taken it literally across the country. Zero problems.

Thanks for the information, I think I'll go for a N55 for my next BMW as I want to get a M2 I can work on myself, I am not a drifter so I think it will be satisfactory. The S55 sounds overly complicated with more failure points, admittedly it would be cool to have more power but I like to be realistic.

An engine with 4 water pumps and 8 radiators should be illegal to make.

Omg! 3 more electric water pumps to replace!!! One is enough! Lol

s55 is a track/racing engine n55 is daily/street regular car engine. s55 can withstand more but is also more expensive in repairing/maintaining. Judging the fact that n55 cars are half the price of s55 I am happily owning my 640i with n55 XD

Hi everybody, just a note- the N55 does not have a forged crankshaft in MOST applications. There are a couple exceptions including the M2, F26 M40i (yes, the X4 did NOT initially use a B58) which have truly forged steel cranks, along with the Alpina variants. The M235i, LCI M135 (and ActiveHybrid 3 if anyone gives a shit or owns one) are oddballs... They have cranks that are made from a stronger steel, rather than the iron in the other N55 variants. if you have a 135, 335, 435, 535, 640, X3, X4, X5, or X6 with an N55, you have a cast crank. This is a common misunderstanding, and I see how easily this info can be confused so I don't fault you for it. It's just worth knowing if you are trying to build these engines, it's what I do for a living. Thanks for reading!

GREAT VIDEO! You have balls! The last time I tried to explain the differences between the S55 and N55 to owners of the N55 I literally got all kinds of profane comments stating I didnt know what I was talking about. People have this belief that you can buy the cheaper alternative and achieve better results than the more expensive model without doing extensive upgrades. Rule of thumb: engineers get paid larger salaries than we do to increase hp in todays cars reliably and the companies charge you for the extra engineering. There are a lot more differences than you explained in the engineering of the entire S55 F80. You are right it would take you an hour to explain them. Lol

The S55 is a masterpiece. I can’t wait to see what BMW have done with the S58

Great video Omar! There’s a lot of things about the S55 that I didn’t know

Great job on gathering all that information! I definitely enjoyed watching this video, and also learned some facts from the S55 I didn't know.

Love these types of videos that you produce. Keep up the great work man!

Quite educational. I am looking forward to the 1 and a half hour long version of this topic.

Fantastic video, this is an engine geeks paradise! Had no idea there was that much difference in the engines, makes you appreciate the BMW engineering even more! I’m about to buy an m135i so this is amazing

Very well done and Informative video. I’ve been looking to learn more about the exact differences between the two engines.

I have a 2016 F82 M4 Competition and I must say that this video was a real eye opener about my S55 engine! Great engine, great car, great daily driver and an equally great video! Kudos and enjoy your new M4! 👍 🏁🏎

Ton of great info, thanks 🏁