[Knonsense]

//M takes the N55, does their skunkworx, and voila - 430 at the crank.

http://www.bmwblog.com/2013/09/25/meet-new-s55-engine/

//M agrees that the twin-scroll is sub-standard for performance

i want the exhaust side on my n55!!!!!!!


'TwinPower' now refers to both twin-scroll turbine and biturbo. It makes just as much sense as the nomenclature convention. Also, the F-series all have twin exhausts. suck it easy, BMWNA Marketing

[marCOCOpuffs]

I don't understand...bmw engineered the N55 to be more efficient/reliable than the n54. Stock for stock it might even be faster... I'm not sure they were too worried about aftermarket performance. That being said, go buy a VTT stage 2 and call it a day.

[DesertBMW]

coming from person who titles the thread only as "S55"

What do you know about marketing?

[Knonsense]

i wrote a whole SWOT analysis of BMW's North American market. and then IE crashed.


i still have the wrong goddamn manifold and this silly twinscroll turbine. and the n54 still doesn't have ValveTronic. c'mon!

[turbo_chris]

N54 has vanos. It doesn't have valvetronic.

[hailpersia]

Originally Posted by Knonsense

i wrote a whole SWOT analysis of BMW's North American market. and then IE crashed.


i still have the wrong goddamn manifold and this silly twinscroll turbine. and the n54 still doesn't have VANOS. c'mon!

WAITTTTT.....you use IE?

[Knonsense]

Originally Posted by hailpersia

WAITTTTT.....you use IE?

yea. work computer.

[snaimpally]

I'm waiting for someone to figure out which S55 parts can be grafted onto the N55. It would be sweet if we could add OEM parts (e.g., bigger turbo) and get some nice gains.

[hetzle]

The S55 is a crazy motor, Terry at BMS put down 427whp stock on a Dynojet, 479whp with a tune. This will probably be the next 2JZ...

[Benstuck]

Originally Posted by hetzle

The S55 is a crazy motor, Terry at BMS put down 427whp stock on a Dynojet, 479whp with a tune. This will probably be the next 2JZ...

I wonder if they said that about the N54..

[e92proper]

Originally Posted by hetzle

The S55 is a crazy motor, Terry at BMS put down 427whp stock on a Dynojet, 479whp with a tune. This will probably be the next 2JZ...

Highly doubt that it will be the next 2jz...iron block, forged internals, vvti (which was cutting edge at the time) stock ceramic bearing turbos and a laundry list of other goodies make the 2jzGTE almost the most bullet proof stock engine ever. Highly doubt any BMW engine ever will be able to internally handle 800-1000 hp with stock internals. I just can't see a better, more reliable engine than a Nissan RB, an LS1, or a 2jz being built anytime soon.

[135Pats]

S54>2JZ. At this point the GTE is irrelevant outside of dyno graphs. Obviously at the time it was a new frontier, and it's certainly a horse of a short block.

[Knonsense]

Originally Posted by snaimpally

I'm waiting for someone to figure out which S55 parts can be grafted onto the N55. It would be sweet if we could add OEM parts (e.g., bigger turbo) and get some nice gains.

[Subaru335i]

Originally Posted by 135Pats

S54>2JZ. At this point the GTE is irrelevant outside of dyno graphs. Obviously at the time it was a new frontier, and it's certainly a horse of a short block.

Wut? How is the 2JZ irrelevant? It makes and takes crazy power without breaking...
The S54 isn't even that much lighter.

[Delta0311]

Originally Posted by DesertBMW

coming from person who titles the thread only as "S55"

What do you know about marketing?

What do you mean by that? The OP is referring to the S55 engine. As in the engine in the M3 and M4.

[135Pats]

Originally Posted by Subaru335i

Wut? How is the 2JZ irrelevant? It makes and takes crazy power without breaking...
The S54 isn't even that much lighter.

Perhaps irrelevant was an overstatement, but in terms of outright performance? It's close to irrelevant.

The only people doing GTE builds are doing it for a dyno printout, magazine shoot, or cool swap. As an actual performance platform, it's been eclipsed by numerous motors and the chassis is no good. I'm not denying its' legacy in the tuning world, or the strength of the block. But in comparison to more modern platforms, it's heavy, inefficient, and hampered by awful OE fueling and command systems.

There is absolutely no question that for an 800-1K WHP build that had any intention of actually being driven, S54>2JZ. Have you seen the spool on GTEs with those 76mm turbos? It's absolutely terrible.

[Subaru335i]

Originally Posted by 135Pats

Perhaps irrelevant was an overstatement, but in terms of outright performance? It's close to irrelevant.

The only people doing GTE builds are doing it for a dyno printout, magazine shoot, or cool swap. As an actual performance platform, it's been eclipsed by numerous motors and the chassis is no good. I'm not denying its' legacy in the tuning world, or the strength of the block. But in comparison to more modern platforms, it's heavy, inefficient, and hampered by awful OE fueling and command systems.

There is absolutely no question that for an 800-1K WHP build that had any intention of actually being driven, S54>2JZ. Have you seen the spool on GTEs with those 76mm turbos? It's absolutely terrible.

Ok that is a much better argument. Irrelevant is an overstatement but really I only think of the 2JZ for swaps and drag cars. There is a local guy here with a 1000+whp Mustang notchback with a 2JZ w/ GT45R and it is a beast.
Certainly takes a while to spool but not ridiculous, it still makes more power than most cars by 4-5k rpms.
In the supra with mostly stock supporting systems its not that great. The block is just bulletproof.

[hetzle]

Terry is now at ~530whp/570wtq running an ethanol mix

[Knonsense]

S54 is NA and based on the M54 - M for natural aspiration.
S55 is twinturbo'd and based on the N55 - N for forced induction.

don't see how the S54 enters the convo about the hoped parallels between the N55 and the S55.

[135Pats]

Originally Posted by Knonsense

S54 is NA and based on the M54 - M for natural aspiration.
S55 is twinturbo'd and based on the N55 - N for forced induction.

don't see how the S54 enters the convo about the hoped parallels between the N55 and the S55.

It doesn't. Somehow the 2JZ came into this thread, and it turned into a debate RE: great tuning platforms. I feel pretty strongly that in terms of BMW, the S54 and S85 are the best motors they've ever produced by a rather enormous margin.

The S55 doesn't belong in the same zipcode of awesomeness as the S54. It's nice that we're seeing good power with piggybacks and octane, but that's not at all surprising for a factory boosted 6. Let's see when things start to fall apart, then we'll know what type of motor it is. I will say the curve looked pretty nice for stock turbos.

[Knonsense]

Originally Posted by 135Pats

The S55 doesn't belong in the same zipcode of awesomeness as the S54

the S55 is massively more efficient than the S54. I'll report back once I refind that info, but I think it's like 50% more efficient w/more power and w/more force, so it's >>50% more efficient.

Originally Posted by 135Pats

Let's see when things start to fall apart, then we'll know what type of motor it is.

Agreed. two times

[Knonsense]

found different info towards same endstate.

S55 has different bore/stroke than N55, different block, etc etc. probably the end of N borrowing from S
http://f80.bimmerpost.com/forums/sho...d.php?t=893611