[ric124]

Originally Posted by quikM2

I thought the N55 in the M2 was much more than that. I thought it had beefed up internals and much more over the standard N55 in the m235i so much so it was dramatically different and they gave it a different designation N55 etc. etc.

I will let one of the more knowledgeable comment and clarify.

Here you go.

http://m.wardsauto.com/test-drives/b...gine-new-again

[zenmaster]

Originally Posted by ric124

Here you go.

http://m.wardsauto.com/test-drives/b...gine-new-again

Want to note that the M235i's N55 also uses a forged crankshaft, so not sure why they mentioned that one.

[Nine Lives]

Originally Posted by bim2er

Some S55 internals does not make it a tune.

This is why I mentioned semantics.

OK it's been finessed but has a tune.

It's still an N55 motor though.

[Japper69]

Originally Posted by zenmaster

Gotta assume S55. But in base model or special edition? If they upping their game that much, m3/4 getting similar bump.
Of course also if base, 2016/17 values will tank!

Another rumour from dealer source today is that the base model retains N55 but a CS / CSL test mule is currently running N55 but with water injection system from M4 GTS.

[zenmaster]

Originally Posted by Japper69

Another rumour from dealer source today is that the base model retains N55 but a CS / CSL test mule is currently running N55 but with water injection system from M4 GTS.

Dealers don't know. But, adding water injection is an easy guess.

[quikM2]

Originally Posted by ric124

Here you go.

http://m.wardsauto.com/test-drives/b...gine-new-again

Thanks! Yeah I would say quite a bit more work was put into this version than just a tune. I do notice halfway through the article he mentions this:

"Manufactured in Steyr, Austria, the intercooled engine has a closed-deck design, meaning the cylinder water jacket is closed at the top. The result is an engine that is extremely rigid and can endure higher cylinder pressures and accommodate more horsepower and torque.

Higher output required grey cast-iron cylinder liners, which add weight relative to the spray-in liners they replace but absolutely are necessary..."

I thought this 'is it closed deck or not' topic was being consistently debated and nobody was 100% sure. This guy seems quite matter of fact.

[Destroya]

Originally Posted by quikM2

Thanks!

I thought this 'is it closed deck or not' topic was being consistently debated and nobody was 100% sure. This guy seems quite matter of fact.

More fuel for the fire....

[Nine Lives]

Originally Posted by quikM2

Higher output required grey cast-iron cylinder liners, which add weight relative to the spray-in liners they replace but absolutely are necessary..."

I thought this 'is it closed deck or not' topic was being consistently debated and nobody was 100% sure. This guy seems quite matter of fact.

The N55 already uses cast iron liners,so nothing new there.

It's the S55 with spray in liners and obviously has more power than the N55 will ever have without having to resort to "absolute necessary cast liners"....

So I wouldn't take this description as gospel.

[Msmall143]

all m cars should have a s engine

[DivideBYZero]

Originally Posted by Msmall143

all m cars should have a s engine

The OG E28 M5 had an M code engine.


Dogma busted.

[Hankdoll]

Originally Posted by DivideBYZero

The OG E28 M5 had an M code engine.


Dogma busted.

E28 M5 had S38

[Japper69]

Originally Posted by zenmaster

Dealers don't know. But, adding water injection is an easy guess.

Dealers don't know and Niether do we. An easy guess that i dont believe has been discussed here.

[zenmaster]

Originally Posted by Japper69

Dealers don't know and Niether do we. An easy guess that i dont believe has been discussed here.

http://f87.bimmerpost.com/forums/sho...&postcount=346

[DivideBYZero]

Originally Posted by Hankdoll

E28 M5 had S38

Only in the US. Euro version was an M code motor.

[switlikbob]

Originally Posted by Nine Lives

This is why I mentioned semantics.

OK it's been finessed but has a tune.

It's still an N55 motor though.

What BMW did to the N55 in the ///M2 is very impressive, and makes it a much more capable motor. And if the closed deck block rumor is true, then it's even more capable for turbo applications.

As a point of reference, I built the S50 motor in my late e36 M3 with upgraded pistons, rings, and forged connecting rods (it already had a forged crank) for a custom turbo setup. In stock form on 93, this engine with good tuning could handle less than 450 whp with some reliability (head gasket was weak point). With the built motor, tuning, larger turbo, and more boost, the motor could make upwards of 600whp easily and reliably on 93. Add water injection and race fuel, and 800whp is attainable.

My point is that that with the internal engine modifications that BMW made to our N55, there is an excellent base for making pretty big power with minimal modifications.

For example, a larger but efficient turbo (new charge & down piping required), external wastegate, BOV, boost controller, larger intercooler, better turbo manifold, and tune would most likely get the ///M2 in the 450-500whp area. Of course, this could be expensive. But as time passes, and more options become available, prices will come down. Just keep in mind, the hardware can only work as well as the tuner makes it work.

And one last thing...
It sounds much better than the S55 (ball bearings raping cement).

[bim2er]

Originally Posted by Japper69

Another rumour from dealer source today is that the base model retains N55 but a CS / CSL test mule is currently running N55 but with water injection system from M4 GTS.

While certainly possible, maintaining the water is a concern so water injection is something I would expect to see in a GTS or CSL and not a Competition Package/ClubSport model.

[bim2er]

Originally Posted by Japper69

Another rumour from dealer source today is that the base model retains N55 but a CS / CSL test mule is currently running N55 but with water injection system from M4 GTS.

While certainly possible, maintaining the water is a concern so water injection is something I would expect to see in a GTS or CSL and not a Competition Package/ClubSport model.

[zenmaster]

Originally Posted by bim2er

While certainly possible, maintaining the water is a concern so water injection is something I would expect to see in a GTS or CSL and not a Competition Package/ClubSport model.

It's hardly a concern. Infrequent refills and the refills arent required.

[ryem3]

Originally Posted by zenmaster

It's hardly a concern. Infrequent refills and the refills arent required.

Not sure that's the case. Watched a guy test a car and run out of water after a couple of laps. Not that it hurts the car,but you lose power of course.

[slashrawr]

Originally Posted by RPM2-85

Ummm, ok. Go look at the nurburgring vids. Then option out a 240i to M2 specs and see where that gets you..... Your waiting for rear LED's and 20hp.... I wouldnt worry man. Its one of the best drivers cars I ever owned. Great performance every day car. Its the PERFECT M car and all the haters have no clue what they are talking about.

I've seen the Nürburgring vids...that one with Klaus is ridiculous. It highlights the capability of the M2 but bear in mind how much talent and outright experience that guy has. He was passing vastly more capable track cars because of his own capability. That's what comes with doing lap after lap of the Ring for years. I certainly will never be able to drive the Ring like him, and I would never drive to that limit on the street. Like I said, most M2s will never see a track. If you're one of the lucky few that will track your M2 that's fantastic and I bet you'll enjoy every turn.

If you want to use Nürburgring lap times as the benchmark for the better car why not look at a Civic Type R or Megane RS Trophy or Golf GTI Clubsport S? They're all quicker around the Ring than the M2, but that doesn't necessarily make them better cars.

I may end up waiting for "only" LED lights and 20hp but that's an improvement on what you've already said is an amazing car anyway. So it's a win. I'm also hoping for interior colour options, white backlit dials, birds eye view cameras and active blind spot assist. If it gets any of those, great, an awesome car becomes even more awesomer. If it doesn't get them, then so be it, I still get an awesome car anyway. It's a win/win.

[slashrawr]

Originally Posted by MMMBRAP

I'm also really hoping they offer Sakhir for the LCI. That would be icing on the cake for me.

Yes! A million times yes!

[zenmaster]

Originally Posted by ryem3

Not sure that's the case. Watched a guy test a car and run out of water after a couple of laps. Not that it hurts the car,but you lose power of course.

On average, it only has to be refilled every 3,000 kilometers or 1864 miles!

According to the Bosch numbers, it'd be like 6 times a year, or every 8 fillups for me.

However, BMW says it depends on driving style: every fill up when racing or every 5 if driving "fast".

http://www.m-power.com/_open/s/varli...d=3301&lang=en

"In rigorous action out on the racetrack, it is always necessary to refill the water supply whenever the car must refuel. During standard operation, the intervals between water refills are considerably longer, depending on the driving style. Even when driving faster on the motorway, it is only necessary to refill the water container roughly every five stops for refuelling. To ensure the system is as suitable as possible for daily use, it does not require any additional maintenance."

Again, hardly a concern!