08-10-2017, 10:38 AM | #67 |
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08-10-2017, 01:32 PM | #69 | |
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Two birds with one stone.
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pissclams277.50 |
08-10-2017, 01:53 PM | #70 | ||
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I've no problem treating the neighbours to an early morning cold start. Gets them 'up and at em' and is a really nice sound.
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Corinne1171.00 |
08-10-2017, 03:14 PM | #71 | |
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It's a (very well-designed) computer-generated sound; no mechanical input whatsoever. I don't want to listen to the equivalent of a video game but I'm all for piping in the real sound into the cabin or manufacturing/engineering real, mechanical parts that sound glorious. Although added HP/decreased back pressure would have been nice... |
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Lieutenant Biscuits101.50 |
08-10-2017, 03:30 PM | #72 | |
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Whether it comes from a speaker or exhaust tip, what's the difference when there's zero performance gain and it's only there to increase the bulge in the driver's pants? |
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soco35277.50 |
08-10-2017, 05:47 PM | #73 |
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Has anyone ever done dyno tests with the MPE?
I find it odd that there isn't any Performance gain at all. I'm wondering if the zero Performance claim has to do with not affecting emissions ratings and taxes. Or against warranty claims. For instance, a user who has modified his car to have the same Performance increase using other methods can claim it shouldn't affect the warranty of the car. |
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JustChris17427.50 |
08-10-2017, 06:43 PM | #74 | ||
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Lieutenant Biscuits101.50 Robin_NL8679.50 |
08-10-2017, 07:51 PM | #75 |
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08-10-2017, 10:14 PM | #76 |
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08-11-2017, 01:46 AM | #77 | |
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I will be able to give some feedback soon as i've just ordered the Remus. |
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08-11-2017, 02:24 AM | #78 | |
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08-11-2017, 06:08 AM | #79 | |
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08-11-2017, 06:50 AM | #80 | |
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08-11-2017, 01:03 PM | #81 | ||||
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What happens AFAIK: the engine management arranges to quickly heat up the catalytic convertors through 'open loop' fueling (fueling control loop: fuel/air-fuel ratio feedback loop between the injector pulse and oxygen sensors). On cold start, some open loop algorithm pulses the injectors until the time that oxygen sensors are sufficiently warmed up to properly do their job. Oxygen sensors feature heater wires to help shorten this time and maintain operating temperature. Hence, the open loop fueling only happens during a brief time window after firing up the engine and won't be triggered that way if the engine was already warmed up to operating temperature (you'll notice that there won't be that hallmark cold start deep bass sound if you restart the engine briefly after a drive). Reason for all this: emissions requirements and getting the cold engine a little quicker up to temp. With a manual gearbox, the loudness of an M2 cold start (with or without MPE) or 1M (with or without Akrapovič exhaust) can definitely be toned down by using the clutch and accelerator pedals in close harmony. Fire up the engine (if you got MPE: don't open the butterfly valve) and immediately climb a little higher in the revs (thus higher than the usual 1200-900rpm engine idle yo-yo cold start start-up sequence) with the accelerator pedal, whilst partially depressing the clutch pedal. Just a matter of subtle interaction between the left and right feet to slowly move forward/backward out of your parking space whilst gently subduing the deep bass sound. You'll notice that by doing so, you'll reduce that deep bass sound loudness. And as this pedal interaction only takes place at very slow speed and for a very brief period of time (just enough to move the car from its parking spot), it's best to operate when in a location where the deep bass sound could eventually bother other people nearby (especially from dusk till dawn). A lesser known fringe benefit of a 6MT compared to an M-DCT. Technical explanation (general): "Internal combustion engine cold-start efficiency: A review of the problem, causes and potential solutions": http://www.sciencedirect.com/science...96890414001939 Quote:
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08-11-2017, 07:37 PM | #82 | |
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08-12-2017, 12:27 AM | #83 |
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Drives: 1995 M3 coupe; 2017 M2
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m33porsche sez: 'Lets be honest the hate is envy, just like I'm envious of the LCI cluster. there will be lots of self deceiving denial but that's really all there is to it.'
Seriously and in complete honesty, I do not 'envy' the MPE. Nor do I 'hate' the MPE. It's a meaningless gesture in my view. If it gives you some sense of satisfaction to call that 'self deceiving denial,' then by all means gratify yourself. My view of the MPE: If it floats your boat and you are in the mood to pay for one, fine. I'm simply uninterested. I find the stock exhaust more than adequately aggressive - loud, deep baritone, with plenty of snap and crackle at speed. If you gave me an MPE gratis tomorrow, I'd sell it before the day was done. If you'd care to send me one to see whether I really and truly mean that, or whether that's just 'self deceiving denial,' I'll send you a mailing address. As for wheels that add nothing to performance, I understand your point. However, I find the black 437m wheels that come with the M2 as sold in the US offensively unattractive, which I gather many others do not. Personally, I'll gladly spend the dinero to get a set of more esthetically pleasing wheels for the car for summer, in silver like my 640m 18 inch winter set, which I think looks great on the car in LBB. And looks are not insignificant when you're looking at an otherwise very nice looking new automobile. Last edited by chambolle; 08-12-2017 at 12:38 AM.. |
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08-12-2017, 01:24 AM | #84 | |||
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That said, I'm sure that everyone who buys them does so for the sound of the exhaust, and enjoying cruising around the CBD where the tall buildings create a great environment for the sound to reverberate. Quote:
One thing I've noticed in the media here in Australia, is that when there is some offence committed with a car, the article will seldom mention the make of the vehicle ... except if it is a BMW. It just creates an impression like this... Quote:
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08-12-2017, 08:37 AM | #85 | |
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Some people prefer goodies of the BMW M Performance catalogue or third party after market suppliers, over the stock set-up of their ///M car. In principle not per se (except if solely serving the purpose of 'buying bragging rights'), but because they consider that it 'improves' their car a little more and complies with their personal taste. Of course only few of those goodies are truly automotively functional (think for example of a tune, coilovers and, at very high speed, maybe also the MP trunk spoiler replacing the smaller Gurney flap), whilst the vast majority are merely aesthetically functional (tweaked sound and vision to some - ruined sound and vision for some others). So what about the M2 M Performance Exhaust ? To most petrolhead ears the MPE adds aural pleasure and suits well this type of car. No cheap thrill. To some petrolhead ears the MPE is aural overkill. And to still some others the MPE may be even considered an outright nuisance.
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08-13-2017, 08:19 AM | #86 | |
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'18 LBB MT M2 Exec pkg, Moonroof, Production 7/6/17 Last edited by boostm3; 08-13-2017 at 08:25 AM.. |
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08-13-2017, 08:55 AM | #87 | |
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Hating on the MPE is sort of like hating on someone who puts on a non functional spoiler or black kidney grills. It's just personal preference. |
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///Cardia299.50 |
08-13-2017, 11:55 AM | #88 |
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For the record: what BMW representatives said at SEMA 2015 in interviews about the M2 M Performance Exhaust:
See here: Q: How much weight will the M Performance Exhaust save over the factory setup?See also here: Q: What are the technical specs on the M2 exhaust system?MPE parts numbers:
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