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      10-07-2016, 05:17 PM   #1
Dackelone
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Arrow M240i Review - NEW 2017 (The M235i replacement)

Another great video from Joe...

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      10-08-2016, 10:15 AM   #2
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Thanks for posting. Very interesting comparison between the M235i and M240i.
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      10-08-2016, 01:00 PM   #3
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Bore Stroke Ratio

Thinking that Joe's gut feeling about the M240i B58 engine can be explained by the B58 being an undersquare / longer stroke engine than the N55 which is slightly oversquare / larger bore. Therefore, the peak torque of the B58 is made at a lower engine speed. Throw in improved cooling and the differences are what Joe describes. Also explains the need for the forged crank & rods.
.
.
However, I wonder how the B58 will compare in maintenance cost and long term ownership:

(2) WATERPUMPS VS (1) FOR EXAMPLE.
.
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      10-08-2016, 01:34 PM   #4
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Quote:
Originally Posted by 123Britt View Post
Thinking that Joe's gut feeling about the M240i B58 engine can be explained by the B58 being an undersquare / longer stroke engine than the N55 which is slightly oversquare / larger bore. Therefore, the peak torque of the B58 is made at a lower engine speed. Throw in improved cooling and the differences are what Joe describes. Also explains the need for the forged crank & rods.
.
.
However, I wonder how the B58 will compare in maintenance cost and long term ownership:

(2) WATERPUMPS VS (1) FOR EXAMPLE.
.
B58 looks great from a performance perspective. But from a maintenance perspective, long term, looks like a nightmare. Pure speculation at this point, but just look at the oil filter placement :/

And doesn't the N55 in the m235 have a forged bottom end? I remember reading an article/press release that supported this. The same one where they confirmed that the m235 was faster than the 1M around the track.. I'll try to find it.

Found it:

http://www.2addicts.com/forums/showt...9#post15275019
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      10-08-2016, 04:39 PM   #5
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Quote:
Originally Posted by Dylan86
Quote:
Originally Posted by 123Britt View Post
Thinking that Joe's gut feeling about the M240i B58 engine can be explained by the B58 being an undersquare / longer stroke engine than the N55 which is slightly oversquare / larger bore. Therefore, the peak torque of the B58 is made at a lower engine speed. Throw in improved cooling and the differences are what Joe describes. Also explains the need for the forged crank & rods.
.
.
However, I wonder how the B58 will compare in maintenance cost and long term ownership:

(2) WATERPUMPS VS (1) FOR EXAMPLE.
.
B58 looks great from a performance perspective. But from a maintenance perspective, long term, looks like a nightmare. Pure speculation at this point, but just look at the oil filter placement :/

And doesn't the N55 in the m235 have a forged bottom end? I remember reading an article/press release that supported this. The same one where they confirmed that the m235 was faster than the 1M around the track.. I'll try to find it.

Found it:

http://www.2addicts.com/forums/showt...9#post15275019
Thanks for posting that was a good read.
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      10-10-2016, 03:30 PM   #6
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I don't get it? He driving it in EcoPro mode? Look closely when he scrolls through the computer functions.
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