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      02-22-2012, 10:25 PM   #45
antzcrashing
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Quote:
Originally Posted by Liquid2.0T View Post
I think the crank figures posted are wrong mathematically. What am I missing here?

275whp * 1.15 = 316.25hp to the crank. Not 324hp as claimed.

Am I not taking into account something? I see this is not the first time this translation has been done incorrectly also.
275 / .85 = 323.7
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      02-22-2012, 10:41 PM   #46
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The engine of F10 535i dyno 277hp and 283lb-ft at the wheel. So this sounds about right.
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      02-22-2012, 11:20 PM   #47
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Quote:
Originally Posted by antzcrashing View Post
+1, and the I6 won't come with granny wheels
Explain "granny wheels"......both 328i and 335i come with the same 18" wheels.
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      02-22-2012, 11:23 PM   #48
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or 440i ?!
I hope so! They better bump up the power when the coupe comes out! 300hp just isn't gana be enough anymore..
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      02-22-2012, 11:26 PM   #49
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that's a better looking curve than the stock N54 curve i think
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      02-22-2012, 11:29 PM   #50
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Quote:
Originally Posted by iwannabimmer View Post
Explain "granny wheels"......both 328i and 335i come with the same 18" wheels.
the base comes with 17"
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      02-23-2012, 12:33 AM   #51
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I woke up this morning, thinking: Some other great threads on a F30 328/N20 being tested...

But my eye cought THIS particular thread. Strange huh?
The fact is, I, from the beginning, knew a N55 is a phenomenal engine , I have it in my current 535i. And I know the N54 as well. Superb.

And if you literally cut off 2 cylinders you get the N20 more or less. N55's smaller brother so to say.(but very very good , don't get me wrong!)


Then I read this post:
Quote:
Originally Posted by antzcrashing View Post
what you guys are not considering is that that 6 cylinder is barely breaking a sweat, whereas the 4 cylinder is working its ass off. The 6 will be a more long-lasting and reliable engine.
I can only agree with you. Fwiw.

Cheers
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      02-23-2012, 02:54 AM   #52
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Quote:
Originally Posted by justinnum1 View Post
the base comes with 17"
That's fine. Everyone here so far has bought a 328i or 335i with a Line and all of them have at least 18" wheels. Plus, why 17s have to be granny wheels?
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      02-23-2012, 03:35 AM   #53
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Quote:
Originally Posted by iwannabimmer View Post
That's fine. Everyone here so far has bought a 328i or 335i with a Line and all of them have at least 18" wheels. Plus, why 17s have to be granny wheels?
Imo 17"will do. But it is the absolute minimum for an F30...
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      02-23-2012, 05:53 AM   #54
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Environmentalists

What's happened in Europe over the last decade, due to the fast progress of 4-cyl gasoline engines, is that the depreciation on the larger engines has steeply increased.

With the road taxes more and more being determined by the displacement size and CO2 exhausts, you can more or less get a 3 year used 330i for the same price as a 320d, only to end up with 20-30% higher running costs. After more years than that, the bigger engine models are practically ice cold due to more wear (more active driving) and 2-3 times higher repair costs.

Traded 535i for a new 320d in 2009 and has practically never missed the bigger engine in terms of performance, only for its sounds and its more sophisticated charisma. (even the smallest bimmers start their hp/torque models where the competitors leave off)

As I see it after owning a couple of bavarian masterpieces is that regardless of their engine size, very seldom do they become "slowly suicidal boring" to drive..

(of course not fair to compare a dual turbo gasoline with a single turbo diesel, just a heads-up for what the environmentalists might be up to in your country soon too)

Cheers
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      02-23-2012, 07:05 AM   #55
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Quote:
Originally Posted by antzcrashing View Post
what you guys are not considering is that that 6 cylinder is barely breaking a sweat, whereas the 4 cylinder is working its ass off. The 6 will be a more long-lasting and reliable engine.
Meh. Engines don't "sweat". If it is operating within design tolerances and properly built, it should make no difference.

That's like saying the N55 is "working its ass off" because the old E46 328 2.8L is also an inline 6 but makes less power. The comparison has no merit in terms of longevity conclusions - they are different engines with different designs and different builds.
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      02-23-2012, 07:08 AM   #56
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Quote:
Originally Posted by rackley View Post
Meh. Engines don't "sweat". If it is operating within design tolerances and properly built, it should make no difference.

That's like saying the N55 is "working its ass off" because the old E46 328 2.8L is also an inline 6 but makes less power. The comparison has no merit in terms of longevity conclusions - they are different engines with different designs and different builds.
No offence, but you didn't study engineering did you?

I have.

Edit: If a N20 rates at 275HP at the crankshaft, then a N55 could do 275:2(litres)=137.5 x 3(litres)= 412.5 HP.
That's a lot.


Cheers
Robin

Last edited by Robin_NL; 02-23-2012 at 07:14 AM.
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      02-23-2012, 08:12 AM   #57
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Quote:
Originally Posted by Robin Hood View Post
I woke up this morning, thinking: Some other great threads on a F30 328/N20 being tested...

But my eye cought THIS particular thread. Strange huh?
The fact is, I, from the beginning, knew a N55 is a phenomenal engine , I have it in my current 535i. And I know the N54 as well. Superb.

And if you literally cut off 2 cylinders you get the N20 more or less. N55's smaller brother so to say.(but very very good , don't get me wrong!)


Then I read this post:


I can only agree with you. Fwiw.

Cheers
Robin
You are right. The N55 is going to be solid. It has been around for a while now without major issues and there is really no question in reliability. As the N52 was the silky smooth bread and butter engine, the N55 has taken its place (even though it is more powerful).

I haven't test driven the N20, but it sounds like an awesome engine. I probably could have bought it and been just as happy, but I have been waiting for the N55. For the past couple of years I have been saying that once the N55 is in the new body style I am there...And now here I am
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      02-23-2012, 08:54 AM   #58
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Quote:
Originally Posted by Robin Hood View Post
No offence, but you didn't study engineering did you?

I have.

Edit: If a N20 rates at 275HP at the crankshaft, then a N55 could do 275:2(litres)=137.5 x 3(litres)= 412.5 HP.
That's a lot.


Cheers
Robin
Exactly -

Calculated HP / Liter for each engine

N55 - 328hp/3L = 109hp/L
N20 - 270hp/2L = 135hp/L

The N55 is most likely stressed less than the N20. As Robin pointed out, if the N20 was "grown" into an N55, HP would be closer to 400HP, more than what you can get from the N55 with tune only. I don't know if the N20 has been beefed up with stronger internals, but it's definitely stressed more.
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      02-23-2012, 08:55 AM   #59
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I don t belive that N20 is not reliable.
VW took out 270hp for the Golf R. BMW posted a power of 245 hp (euro version). So it can t be pushed to the limit at all.
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      02-23-2012, 09:03 AM   #60
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vladberca. I understand and agree. But some engines are more reliable than others. I love the 458 Ferrari engine to death with 570BHP @ 9000rpm from a 4.5 litre V8 NA, but to drive it every day for 20,000 miles? I want to, I really do. And I know this is a weird example.
Edit: For everyday use I'd prefer a 7.0 litre V8 from the C6 Z06 Vette, just 2 valves per cylinder, 512BHP(EU) @ 6300rpm...

My ex 1.8 turbo 5 valve Audi S3 engine with about 270BHP(back in 2000) was blown to pieces because not so strong internals, more or less, but damn it was fast....

Cheers
Robin

Last edited by Robin_NL; 02-23-2012 at 09:11 AM.
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      02-23-2012, 09:15 AM   #61
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@ Robin Hood: it depends a lot also of the maintenance of the engine during its usage: going on a circuit or hard driving its not the same with a normal DD
Remaped, this N20 engine achieve ~295hp. It's an waranty offered too!
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      02-23-2012, 09:23 AM   #62
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Quote:
Originally Posted by vladberca View Post
@ Robin Hood: it depends a lot also of the maintenance of the engine during its usage: going on a circuit or hard driving its not the same with a normal DD
Remaped, this N20 engine achieve ~295hp. It's an waranty offered too!

Only remapped a N55 can do 380/90 BHP easily....

The question is, do we want that as a dd, and dd means to me actually a lot of hard driving....
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      02-23-2012, 09:28 AM   #63
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From what i learned, most ppl here lease cars for 3 years and don't care if the car lasts 8 or 10 years. I for one, trust that BMW makes very solid engines that always collect engine awards of the year. Whoever has a problem with that should change brands. I can dig the flame war of diesel vs petrol (famous in Europe), but really can't get this nonsense, bmw vs bmw...
I guess self-confidence is a comodity these days
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      02-23-2012, 09:35 AM   #64
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Quote:
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From what i learned, most ppl here lease cars for 3 years and don't care if the car lasts 8 or 10 years. I for one, trust that BMW makes very solid engines that always collect engine awards of the year. Whoever has a problem with that should change brands. I can dig the flame war of diesel vs petrol (famous in Europe), but really can't get this nonsense, bmw vs bmw...
I guess self-confidence is a comodity these days
But the car itself will last more than 3 years, as you know.....

Anyway, no worries, we're just talking engineering stuff and I'm stating the N55 is a very relaxed engine to have.

Cheers
Robin
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      02-23-2012, 10:36 AM   #65
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Compared with the Automobile Mag Dyno Run:

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      02-23-2012, 10:51 AM   #66
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N54 was so amazing, i wish they offered it in the 335
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