[BimmerBoomer]

Give me a break: the E92 M3 would slaughter the M235i at any high speed track. And this porky thing weighs over 300 pounds more than my comparably sized E36 M3 did! I'm guessing that the 75 pounds heavier 435i (with equal tires) with the MPPK might beat it on a high speed track too. I agree that given an LSD the M235i would be a fun car and very fast on a twisty road.

Having driven a 435i with MPPK a couple of times recently I too was struck by the difference in feel from the N54 engine (335i 6 speed w/Dinan stage 2 in my case). The power doesn't hit like a hammer down low and the engine doesn't run short of breath quite so suddenly. My 335i wasted a lot of that power doing power squats. This tune with the M55 feels more useful for getting down the road. But my guess is that the optimum shift point is only about 200 rpm higher.

[Gio72]

Originally Posted by alpinweiss 335i

I believe it is 335 HP from the M power pack and 7 HP from the M performance exhaust.

For me it's impossible to gain 7HP with the simple MPE...

[Gio72]

Originally Posted by Jim Pearce

Give me a break: the E92 M3 would slaughter the M235i at any high speed track. And this porky thing weighs over 300 pounds more than my comparably sized E36 M3 did! I'm guessing that the 75 pounds heavier 435i (with equal tires) with the MPPK might beat it on a high speed track too. I agree that given an LSD the M235i would be a fun car and very fast on a twisty road.

Having driven a 435i with MPPK a couple of times recently I too was struck by the difference in feel from the N54 engine (335i 6 speed w/Dinan stage 2 in my case). The power doesn't hit like a hammer down low and the engine doesn't run short of breath quite so suddenly. My 335i wasted a lot of that power doing power squats. This tune with the M55 feels more useful for getting down the road. But my guess is that the optimum shift point is only about 200 rpm higher.

I don't agree.
I own a 435i MPPK and my previous car was a E91 335xi N54 tuned with around 400hp and I was very suprised and happy about behaviour at high revs of N55 powerkitted!!! It pools with no drop til 7.000rpm (except in 1' and 2' gear because of a power and torque limitation) and it runs like a sport normally aspired engine!!!
Yesterday I went for 12 laps on a track and engine, step8 and breakes (M system) were fantastic!

[BimmerBoomer]

http://www.automobilemag.com/reviews...5is_dyno_test/

[Gio72]

Originally Posted by Jim Pearce

http://www.automobilemag.com/reviews...5is_dyno_test/

Ah, because you believe that N55 on E9X has the same tuning that N55 on F3X??? That was a test made just after the introduction of N55, 3/4 years ago!!! Sorry, but what kind of example is it?
In the meanwhile, don't you guess that this engine has been devoloped and improved?
For my N55 with MPPK maximum power is claimed between 5.800 and 6.500rpm, with slight drop after Check out on offical dyno chart of BMW.
It's not only my opinion, but the one of all main testers. Take a look at this interesting review of M235i with N55 in 320hp/326cv configuration:

I confirm that this last N55, expecially with MPPK 335hp/340cv, has a fantastic breath at high revs!
Anyway, I drive it everyday and I know perfectly the differences with my old N54
Good sunday.

[Falafel Combo]

Originally Posted by Jim Pearce

Give me a break: the E92 M3 would slaughter the M235i at any high speed track.

...

Umm, I wouldn't be so sure. It is unclear. The M235i may even edge out the e92 M3, or perhaps the e92 M3 may slightly outperform the M235i. And the truth is it would be really close and we just don't know yet. And in a fair comparison, the M235i would also be equipped with the optional LSD as the e92 M3 is. Either way, no slaughter-ing going down in that comparo.


Remember boys and girls, the M235i is quicker around the Nurburgring than the mighty and very nimble 1M. And that is without the LSD, if I recall correctly (someone correct me if I'm wrong here).

[300hp]

Originally Posted by Gio72

For me it's impossible to gain 7HP with the simple MPE...

BMW Canada quotes the mperformance 335i with MPE and PPK at 342, 326 with the old PPK.

If your car has both options it's reasonable to deduce that you have the same HP

[bmw-nj]

Originally Posted by 300hp

BMW Canada quotes the mperformance 335i with MPE and PPK at 342, 326 with the old PPK.

If your car has both options it's reasonable to deduce that you have the same HP

How does it rate the 335i with a 6 speed and mppk?

Still hard to find info on this.

[BimmerBoomer]

Originally Posted by Gio72

For my N55 with MPPK maximum power is claimed between 5.800 and 6.500rpm, with slight drop after Check out on offical dyno chart of BMW.
It's not only my opinion, but the one of all main testers. Take a look at this interesting review of M235i with N55 in 320hp/326cv configuration:

I confirm that this last N55, expecially with MPPK 335hp/340cv, has a fantastic breath at high revs!
Anyway, I drive it everyday and I know perfectly the differences with my old N54
Good Sunday.

What I know is that BMW claims peak power on the N55 in the F30/32 at 5800 rpm, in the M235i at 5800-6000 rpm. As I recall, peak power with the N54 and Dinan stage 2 was at 5700 rpm. So, 200-300 rpm.

[RicardoSwe]

Gosh !!! Decisions, decisions, decisions.

All good advice given.

I'd go for the 435 myself, since you don't feel you need four doors.

I have the 2014 335 with PPK and PPE. I really doubt the PPE adds much performance at all -- just hard to believe an "axle back" exhaust will have much impact. To me, it's purpose is to provide just sweet sound, which it does very well. If you want to squeak out a bit more performance, go further up the exhaust -- i.e. cat back or further. Eminently do-able.

Man, what a dilemma!! Good luck!

[Gio72]

Originally Posted by Jim Pearce

What I know is that BMW claims peak power on the N55 in the F30/32 at 5800 rpm, in the M235i at 5800-6000 rpm. As I recall, peak power with the N54 and Dinan stage 2 was at 5700 rpm. So, 200-300 rpm.

Is it ok now?


I repeat again: maximum power of 335hp/340cv is gained costantly between 5.800 and 6.500rpm.
As you can see, the line drops very slightly.
But have you really pull your F3X N55???

[Gio72]

Originally Posted by 300hp

BMW Canada quotes the mperformance 335i with MPE and PPK at 342, 326 with the old PPK.

If your car has both options it's reasonable to deduce that you have the same HP

Yes, I think you're right

[Gio72]

Originally Posted by Jim Pearce

What I know is that BMW claims peak power on the N55 in the F30/32 at 5800 rpm, in the M235i at 5800-6000 rpm. As I recall, peak power with the N54 and Dinan stage 2 was at 5700 rpm. So, 200-300 rpm.

It's in italian (but you can find it also in english ), but you can understand that:
- maximum torque is reached in the interval 1300-5000rpm;
- maximum power is reached in the interval 5800-6500rpm.
Now do you believe me?


So, no drop after 6.000rpm, but the exact contrary. This engine configuration for me is fantastic!
About M235i, in the video test posted before it's clear their surprise for the capability of this N55 to pull till 7.000rpm

[BMHunden]

@Gio 72

Thank you, I have enjoyed your recent posts. I used Google Translate to translate the Italian mppk brochure you posted. The word "borbottio" is very descriptive of the overrun burble!

Interestingly, here is a graph from bmw.co.uk which portrays the power and torque curves of the M235i - the power peaks much more sharply and is shown to start dropping off at 6000rpm, all the way down to below 225kw at 7000rpm.

[TurboSpecC]

Originally Posted by chiefneil

Having 2 identical cars in the garage always seems like a wasted opportunity to me. Personally I'd go with a more fun 3rd car since you don't need 4 doors - boxster, cayman, etc.

2x. Cayman/Boxster in a heartbeat.

[happycow6171]

Where do you guys stand on 428i or 435i convertible?.

[Alpine435i]

Originally Posted by Gio72

About M235i, in the video test posted before it's clear their surprise for the capability of this N55 to pull till 7.000rpm

Gio, I don't think you understand what "pulling to 7000 RPM" entails. Yes, the engine will rev to 7000 RPM and it's still producing some level of output at that RPM, but the engine is well past its efficiency range. These engine/turbo combinations run out of breath in the top half of the RPM range and it's very obvious if you look at a dyno.

The average N55 torque and horsepower curve looks something like this, be it stock or lightly modded:



As you can see, peak power is made between 4500-5500 RPM then it tapers off. It's far from ideal, and no one will consider this a powerband which "pulls to 7000 RPM." Even the BMW 435i development car, one of the most powerful F-Series N55 cars, made peak power around 5500 RPM then declined to redline. Although it's still delivering torque to the wheels and the car is accelerating to redline, giving the feeling that you mention, it's not "pulling."

An ideal horsepower curve peaks at redline because an ideal torque curve is flat and horsepower is merely a derivative of torque. For example, something like this...

[300hp]

Originally Posted by bmw-nj

How does it rate the 335i with a 6 speed and mppk?

Still hard to find info on this.

I think AT and MT get the same HP but tq is limited to 317 in the manual. I could be wrong

[nicknaz]

Originally Posted by Jim Pearce

N54 engine (335i 6 speed w/Dinan stage 2 in my case). The power doesn't hit like a hammer down low and the engine doesn't run short of breath quite so suddenly.

Maybe it is because you were using a Dinan tune that tapers boost at high RPM, instead of say the cobb 93 octane tune that targets more boost at high rpm

[BimmerBoomer]

Even directly from BMW this claim is hard to believe. In essence, the whole graph has been extended 500 rpm to the right of anything I've seen before from a third party dyno test of the N55 in any tune. If this bears out the MPPK is a remarkable tune. As for my car, it arrives later this week - and even then I won't be pulling 6000 rpm anytime soon.

[Gio72]

Originally Posted by Alpine435i

Gio, I don't think you understand what "pulling to 7000 RPM" entails. Yes, the engine will rev to 7000 RPM and it's still producing some level of output at that RPM, but the engine is well past its efficiency range. These engine/turbo combinations run out of breath in the top half of the RPM range and it's very obvious if you look at a dyno.

The average N55 torque and horsepower curve looks something like this, be it stock or lightly modded:



As you can see, peak power is made between 4500-5500 RPM then it tapers off. It's far from ideal, and no one will consider this a powerband which "pulls to 7000 RPM." Even the BMW 435i development car, one of the most powerful F-Series N55 cars, made peak power around 5500 RPM then declined to redline. Although it's still delivering torque to the wheels and the car is accelerating to redline, giving the feeling that you mention, it's not "pulling."

An ideal horsepower curve peaks at redline because an ideal torque curve is flat and horsepower is merely a derivative of torque. For example, something like this...

But what kind of curves are there? The tuner was drank when it run the dyno???
No, guys, sorry, but that's out of mind! Peak power between 4500-5500 is impossible for a recent N55.
I know perfectly what I mean with "pulling"
N55 goes up to red line with NO noticeable drop, except in 1st (drop after 6.500) and 2nd gear (drop after 6.700), because of power and torque limitation.
I showed you official curves of BMW but it's not enough to convince you... Goodnight

Edit: aaaah, but they're curves of a JB N55! Excuse me, but what are we talking about? I believed we were talking about N55 stock and N55 MPPK, not tuned by third parties! I've seen a lot of tuned curves, some will done, other with very bad profile. The one you posted has a very bad profile! Even my old N54 with 402ps on dyno had the peak power over 6.000 (6.100rpm if my memories support me...). Bah...

[Gio72]

Originally Posted by 300hp

I think AT and MT get the same HP but tq is limited to 317 in the manual. I could be wrong

No, you're right: MPPK has 450nm Max torque for AT and 430 For MT