[Artemis]

So also the knee pad on the center console for the driver got the "Polar Blue" stitching.

[hs01jowe]

Originally Posted by cc3

Do we know what tyres it is coming on? Needs Michelin Cup 2's??

It's got Pilot Super Sports. It's a great all round sports tyre, Cup 2's are much more track focused.

[BiscottiGelato]

Originally Posted by DJKapeesh

Or keep the 135i

A RAV4 decided to turn left when she can't see through, and then panic braked in the middle of the intersection when she saw me going straight on a green light.

The good part was the dash cam video and the high total loss payout. The bad part is I'm total OCD but not willing to pay the new premium. So getting that perfect car at the perfect price is going to take a while.

[Ian ///M]

Originally Posted by Ryan Bell

Sorry is this a common subject? I'm quite new to this forum.

yes very common rhetoric.

[N54B30A]

Originally Posted by den525

I think you're a little bit confused with the term "closed deck" just because they're both "closed deck" doesn't mean it's the same block.

M2's closed deck crankcase is NOT the same one as the M3/M4s FACT.

Yes, it does borrow the rods, pistons and crank from the S55 engine, but it's pretty self explanatory. The forged steel crankshaft, the crankshaft bearings and the special pistons and high-power spark plugs will allow an increase in the peak power combined with optimum durability in most sports usage.

Along with a completely different turbo system, it's safe to say it's NOT a "dumb down" S55 engine, but rather it's an upgraded N55 as BMW has stated. Since majority of the components are still based on the N55 engine.

How is it an upgraded N55? they dont share any major internal components. Yeah I assumed they're the same block since I highly doubt a cost-cutting company like bmw would create two seperate blocks that share the same bore, stroke, compression ratio, pistons, rods, aluminum alloy, and closed deck design. There would be no point to create another closed deck I6. The "Forged steel crank" was also in an n54, it may not have been the same exact crank. This new "N55" shares a lot more parts and design methods with the s55 than with the old N55. They did this with the N63 and S63, they share the same block, crank, pistons, and rods down to the part number. BMW isn't gonna spend the extra $$$ to make another closed deck block that uses the same internals as the m4, its cheaper to just rename the S55 block as an n55. There would be no point to create another closed deck block for a car that has a limited production run when they already have the b58 on the way.

[FilipMPower]

Originally Posted by sahyoun

How is it an upgraded N55? they dont share any major internal components. Yeah I assumed they're the same block since I highly doubt a cost-cutting company like bmw would create two seperate blocks that share the same bore, stroke, compression ratio, pistons, rods, aluminum alloy, and closed deck design. There would be no point to create another closed deck I6. The "Forged steel crank" was also in an n54, it may not have been the same exact crank. This new "N55" shares a lot more parts and design methods with the s55 than with the old N55. They did this with the N63 and S63, they share the same block, crank, pistons, and rods down to the part number. BMW isn't gonna spend the extra $$$ to make another closed deck block that uses the same internals as the m4, its cheaper to just rename the S55 block as an n55. There would be no point to create another closed deck block for a car that has a limited production run when they already have the b58 on the way.

Which is why it wonders me why BMW didnt use the B58.

[hans007]

Originally Posted by FilipMPower

Which is why it wonders me why BMW didnt use the B58.

i'd guess the engineers know the limits etc of the N55 better.


besides, I don't think the B58 is necessarily even better than the N55. It was just engineered for parts commonality with the B48/B38 etc. Nothing seems to indicate that the B58/B48 are actually better engines than the N55/N20 and i know they are more square which should make them rev lower, and feel even less sporty.

[mofomat]

Originally Posted by sahyoun

How is it an upgraded N55? they dont share any major internal components. Yeah I assumed they're the same block since I highly doubt a cost-cutting company like bmw would create two seperate blocks that share the same bore, stroke, compression ratio, pistons, rods, aluminum alloy, and closed deck design. There would be no point to create another closed deck I6. The "Forged steel crank" was also in an n54, it may not have been the same exact crank. This new "N55" shares a lot more parts and design methods with the s55 than with the old N55. They did this with the N63 and S63, they share the same block, crank, pistons, and rods down to the part number. BMW isn't gonna spend the extra $$$ to make another closed deck block that uses the same internals as the m4, its cheaper to just rename the S55 block as an n55. There would be no point to create another closed deck block for a car that has a limited production run when they already have the b58 on the way.

Maybe you should email BMW and tell them they've made a mistake calling the engine the "N55" then?

[bradleyland]

Originally Posted by mofomat

Maybe you should email BMW and tell them they've made a mistake calling the engine the "N55" then?

The engine code is N55B30T0. Plain and simple, it's an N55 in T0 trim.

[N54B30A]

Originally Posted by bradleyland

The engine code is N55B30T0. Plain and simple, it's an N55 in T0 trim.

Yeah, I understand that. My point is this motor shares a small fraction of its parts with the N55 and a hell of a lot more with the S55. My point is that this motor is a lot more of an s55 than an n55. Im willing to bet that the s55 and this n55 will share the same block part numbers. The m2 engine is a completely separate engine from the old n55. I dont understand the point of an engine code if two engines under the same engine code dont share any internals including the block, which has usually delegated BMW's engine codes in the past.

[PackPride85]

You can find the official differences S55 vs N55 here in the 2nd doc:

http://f80.bimmerpost.com/forums/sho....php?t=1015603

A couple of the "New Development" S55 dots now apply to the M2 N55. The biggest one that doesn't is the twin turbo design and how the S55 was designed to rev to 7500 rpm.

[FilipMPower]

Originally Posted by hans007

i'd guess the engineers know the limits etc of the N55 better.


besides, I don't think the B58 is necessarily even better than the N55. It was just engineered for parts commonality with the B48/B38 etc. Nothing seems to indicate that the B58/B48 are actually better engines than the N55/N20 and i know they are more square which should make them rev lower, and feel even less sporty.

Both engines are probably on the same level, but having the B58 might seem the car more unique in a way.

[PrematureApex]

As soon as the thing has a different block, let alone a different crank, rod and pistons, you can call it whatever you want, it's hardly a version of an N55 in reality. You could easily say the S55 is just an upgraded N55 using that same logic.

What's in a name?

I don't care what they call it. It's an N55, fine. But you can't use that in a derogatory sense when describing the engine, if in fact just about all of the major components are new/upgraded.

[Gibson6594]

Leading to the thought that BMW knew what might happen if they titled the engine an S55 variant. M3 owners would have gone apeshit and sales would have been impacted.

Better to do it this way and keep the peace.

[mofomat]

Originally Posted by Gibson6594

Leading to the thought that BMW knew what might happen if they titled the engine an S55 variant. M3 owners would have gone apeshit and sales would have been impacted.

Better to do it this way and keep the peace.

I don't think the majority of M3 owners have the foggiest idea that their engine even has a name, never mind what it is.

[hans007]

Originally Posted by mofomat

I don't think the majority of M3 owners have the foggiest idea that their engine even has a name, never mind what it is.

this...

i'd wager that a good number of m3/m4 owners think they have a twin turbo v6 honestly.

it really doesn't matter what is in the name. its a n55, but by far the most different and great N55 variant out there. and thats enough for me.

i mean really i don't get people with the whole exclusivity thing. if the engine is awesome and tons of cars had it, it'd still be awesome.

maybe some people's goal is to feel special and exclusive with their BMW (this is my mother, who things the most expensive ones are the best since less people have them). personally i just want the car that i like driving the most. if you want exclusivity , if anything, buy a weird car like a lotus evora or alfa 4c if anything

[filet.M2c]

Here is a dyno pic from the B58 thread. Stock the engine puts down 331 whp/339 ft-lbs and with the BMS prototype tune it puts down 379/378. Those are good numbers for both stock and beta tuning. Guys with the M235i are getting around those numbers running map 2 with catless DPs. I'm really hoping they upgraded the turbo for the M2, as that seems to be the bottleneck.

[dmboone25]

Originally Posted by sahyoun

Yeah, I understand that. My point is this motor shares a small fraction of its parts with the N55 and a hell of a lot more with the S55.

From BMW's own literature, the S55 shares 75% of its respective parts with the N55.

[Gibson6594]

Originally Posted by dmboone25

From BMW's own literature, the S55 shares 75% of its respective parts with the N55.

Unfortunately, until BMW clarifies, we are assuming that the turbo is within that 25% distinction.

[dmboone25]

Originally Posted by Gibson6594

Unfortunately, until BMW clarifies, we are assuming that the turbo is within that 25% distinction.

Sure - there's two of them in the S55 and only one in the N55.

Generally speaking though, the engines are going to be very similar. Even more so on the 0T0 version.

[Gibson6594]

Originally Posted by dmboone25

Sure - there's two of them in the S55 and only one in the N55.

Generally speaking though, the engines are going to be very similar. Even more so on the 0T0 version.

The big question is if that one is the same as the 235's.

[dmboone25]

Originally Posted by Gibson6594

The big question is if that one is the same as the 235's.

My guess would be no.