M40i Pops and Crackles

dominicm · Post by **dominicm** » Fri Jan 03, 2020 4:24 pm

Had mine 4 months, enjoying it and zero problems so far. Spare time between Christmas and New Year so used my GoPro 7 from multiple onboard angles to put a vid together with a focus on sound. Intending to take mine on a skid pan at Thruxton for some sideways action soon.

-Tom- · Post by **-Tom-** » Fri Jan 03, 2020 5:58 pm

Nicely made video ! It sounds decent! It’s often difficult to tell from a video, but have they managed a nice bit of rasp out of the exhaust note ? It doesn’t seem to sound as muted as a lot of the current turbos.

Chippie · Post by **Chippie** » Fri Jan 03, 2020 6:28 pm

Nice One

john-e89 · Post by **john-e89** » Fri Jan 03, 2020 6:38 pm

The disappointing and frustrating thing about modern auto, especially turbo cars obviously, is the lack of any drama on upshifts, all you get a is muted ‘Fluff’ on every change. The E89 35is will give a decent crack at approx over 4250k revs in comfort in manual shifting, it won’t do it in sport however or much over 5k revs so a very narrow window....

Even with mega bucks quality aftermarket exhausts you don't get any grin inducing cracks etc, upshifting, just a louder ‘Fluff’...

1st world problems admittedly but still, some bangs would be nice.

buzyg · Post by **buzyg** » Fri Jan 03, 2020 6:50 pm

Cracker.

Skid pad will be much fun for sure.

Swiftly · Post by **Swiftly** » Fri Jan 03, 2020 10:04 pm

Nice video which has captured the exhaust crackles and pops very well

. I love the sound that my exhaust makes, and I think that BMW have done a good job considering all the crap that they have to stuff in the boxes to comply with EU emissions, however as a comparison I find the Z4's exhaust very muffled when compared to the M Sport exhaust which was fitted to my M240i.

enzed4 · Post by **enzed4** » Fri Jan 03, 2020 10:19 pm

john-e89 wrote: ↑Fri Jan 03, 2020 6:38 pm The E89 35is will give a decent crack at approx over 4250k revs in comfort in manual shifting, it won’t do it in sport however or much over 5k revs so a very narrow window.... Even with mega bucks quality aftermarket exhausts you don't get any grin inducing cracks etc, upshifting, just a louder ‘Fluff’...

Interesting - my 35i does this in 'normal' drive as well, doesn't need to be in manual shift. Usually heard when cold, but not easily reproducible. Gave me a heck of a fright the first time, thought I'd broken something

OP - thanks for the video

john-e89 · Post by **john-e89** » Sat Jan 04, 2020 11:21 am

enzed4 wrote: ↑Fri Jan 03, 2020 10:19 pm
john-e89 wrote: ↑Fri Jan 03, 2020 6:38 pm The E89 35is will give a decent crack at approx over 4250k revs in comfort in manual shifting, it won’t do it in sport however or much over 5k revs so a very narrow window.... Even with mega bucks quality aftermarket exhausts you don't get any grin inducing cracks etc, upshifting, just a louder ‘Fluff’...
Interesting - my 35i does this in 'normal' drive as well, doesn't need to be in manual shift. Usually heard when cold, but not easily reproducible. Gave me a heck of a fright the first time, thought I'd broken something
OP - thanks for the video

It does to an extent yes IF you can get it to upshift at the right moment, not easy in auto, in manual you can hold off a shift until the right time obviously but anyhoo, it’s a small window isn’t it and only in comfort mode, not ideal by any means.....

Maybe it just needs 600bhp and anti lag........

Jollyjoiner · Post by **Jollyjoiner** » Sat Jan 04, 2020 4:53 pm

john-e89 wrote: ↑Fri Jan 03, 2020 6:38 pm The disappointing and frustrating thing about modern auto, especially turbo cars obviously, is the lack of any drama on upshifts, all you get a is muted ‘Fluff’ on every change. The E89 35is will give a decent crack at approx over 4250k revs in comfort in manual shifting, it won’t do it in sport however or much over 5k revs so a very narrow window.... Even with mega bucks quality aftermarket exhausts you don't get any grin inducing cracks etc, upshifting, just a louder ‘Fluff’...

1st world problems admittedly but still, some bangs would be nice.

Me being a sensible driver doesn't need any pops and cracks to have fun

john-e89 · Post by **john-e89** » Sat Jan 04, 2020 7:11 pm

Jollyjoiner wrote: ↑Sat Jan 04, 2020 4:53 pm
john-e89 wrote: ↑Fri Jan 03, 2020 6:38 pm The disappointing and frustrating thing about modern auto, especially turbo cars obviously, is the lack of any drama on upshifts, all you get a is muted ‘Fluff’ on every change. The E89 35is will give a decent crack at approx over 4250k revs in comfort in manual shifting, it won’t do it in sport however or much over 5k revs so a very narrow window.... Even with mega bucks quality aftermarket exhausts you don't get any grin inducing cracks etc, upshifting, just a louder ‘Fluff’...

1st world problems admittedly but still, some bangs would be nice.
Me being a sensible driver doesn't need any pops and cracks to have fun

Apparently Calow is having a whip round for a gold watch you’ve been there so often Nige....

Jollyjoiner · Post by **Jollyjoiner** » Sat Jan 04, 2020 9:08 pm

john-e89 wrote: ↑Sat Jan 04, 2020 7:11 pm
Jollyjoiner wrote: ↑Sat Jan 04, 2020 4:53 pm
john-e89 wrote: ↑Fri Jan 03, 2020 6:38 pm The disappointing and frustrating thing about modern auto, especially turbo cars obviously, is the lack of any drama on upshifts, all you get a is muted ‘Fluff’ on every change. The E89 35is will give a decent crack at approx over 4250k revs in comfort in manual shifting, it won’t do it in sport however or much over 5k revs so a very narrow window.... Even with mega bucks quality aftermarket exhausts you don't get any grin inducing cracks etc, upshifting, just a louder ‘Fluff’...

1st world problems admittedly but still, some bangs would be nice.
Me being a sensible driver doesn't need any pops and cracks to have fun
Apparently Calow is having a whip round for a gold watch you’ve been there so often Nige....

Hahahaha I like that one, top marks matey

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