[Toad]

Hi everyone, noob here.

Finally bought my dream car just a few weeks ago, a stock 2019 M2C

So, I noticed that the sound of the turbos is considerably more noticeable in Sport+ versus Sport. Have you guys also noticed this?

I know the car uses the speakers to amplify the engine/exhaust sound in Sport and then even more so in Sport+, but is this true also for the turbo-sound?

In other words, is the turbo sound I hear just artificially enhanced in Sport+ versus Sport?

Are any of you guys with ASD disabled able to hear difference in sound between Sport and Sport+?

[Enabled]

The different modes, specifically normal vs sport maps have different wastegate settings at partial load in order to control wastegate speeds.
You may be hearing the difference in that. But it wouldn't be in the speakers.

[Provolone]

Beautiful car. Really like the look.

[tenaciousd]

I have ASD disabled and I don’t detect any significant difference in the sound between Sport and Sport+.

[Toad]

False alarm!

I went for a long ride today to test it out, floored it in Sport vs. Sport+ under similar conditions, and... there is no difference in turbo sound, lol.

It seems the reason the turbo is more noticeable sometimes, is that it depends on engine load (might be the wrong terminology). E.g. when i floored it in 4th gear going uphill there was a lot more turbo noise than flooring it going downhill or flat.

I wonder if maybe the engine allows higher boost pressure going uphill? Anybody know?

[Toad]

Originally Posted by Provolone

Beautiful car. Really like the look.

Thanks man! I like the stock look, even though a lowered car with front lip looks cool and more angry/race-car-y. It just makes it more usable because there are so many speed bumps and bad roads in my country

[David1]

I have never heard my turbos make any noise. Nothing on my 17 and no noise on my 21.

[Toad]

Originally Posted by David1

I have never heard my turbos make any noise. Nothing on my 17 and no noise on my 21.

Really?? I'm talking about the sound of the turbos spooling up, building pressure, and the "ptshhh" sound when you let of the gas. They are normal, healthy, sounds for turbo engined petrol cars.

The sound i hear is the same as you can hear in this clip starting @1min44 seconds and onwards. Obviously the sound is MUCH more muted in my car because of smaller turbos and less pressure + better sound deadening:

[Fred Conoway]

Turbo noise is noticeable when my passenger window is down at low speeds; otherwise it's pretty difficult to hear

[reallymarkedup]

If you like turbo noises, go drive a GR Corolla. It might be the 24lbs of boost or it might have just been pumped in fake noises, but I was hearing the blow-off a lot when I drove one through the mountains a month back. Made me feel like a kid, I think I actually giggled a couple times.

[Toad]

Was pondering a bit, and it all makes sense now.
When you're running uphill you'll get exhausted much quicker than running on a flat surface, in other words: your body requires more energy running uphill.

The exact same applies for an engine. When you're going uphill your engine requires more resources = more fuel. But more fuel alone isn't going to cut it. To make use of the increased amount of fuel, your engine also needs more air. More air means your turbos need to spin faster, which equals higher boost pressure. Higher boost pressure = more turbo noise.

So the only way you'll reach sustained max boost pressure, and max turbo noise, will be under load, going uphill or at high speed (high wind resistance).

Wind- and tire noise + ASD will make it difficult to hear the turbos at high speeds, so go uphill if you want the most amount of turbo noise (insert nerd emoji).