[Bmwny2015]

I noticed that when I turn on my car in the morning black fumes come from the right exhaust only as if the left one is not connected is this normal? Also my exhaust tips get black really fast is this because the car is a twin turbo?

[Calmwinds]

Originally Posted by Ahmadhosmanbmw335i

I noticed that when I turn on my car in the morning black fumes come from the right exhaust only as if the left one is not connected is this normal? Also my exhaust tips get black really fast is this because the car is a twin turbo?

lol your 335i has a twin turbo?

[RASHID007]

It's normal for exhaust to flow out one side only because the other is closed off until a certain throttle/speed. I believe it's for emissions reasons.

[aarena]

Originally Posted by CoolDude196

It does doesnt it?

a long time ago the 335i did. now it has "twin power" turbo, basically some marketing bs to say that the engine has very little turbo lag from its single turbo

[Bmwny2015]

Typo error

[Alexc360]

Originally Posted by CoolDude196

Blow me down with a feather
Is there anything actually twin turbo'd now? Or is it all 'twinpower turbo'?

The new M5 and M6 both use a 4.4L twin-turbo V8, replacing the old V10.

The N20 and N55 engines used in the 328i and 335i, as well as other models, have single, twin scroll turbochargers, hence the "TwinPower Turbo" moniker.

[BSM328xi]

Originally Posted by Alexc360

The new M5 and M6 both use a 4.4L twin-turbo V8, replacing the old V10.

The N20 and N55 engines used in the 328i and 335i, as well as other models, have single, twin scroll turbochargers, hence the "TwinPower Turbo" moniker.

Exactly what he said. TwinPower just sounds better than TwinScroll. Either way, it's a single turbo!

[E90Fleet]

The left exhaust pipe valve will be closed at low RPM for Acoustic reasons/
It reduced low RPM droning sounds from the exhaust

[bmbarclay]

Originally Posted by Calmwinds

lol your 335i has a twin turbo?

[Elk]

Originally Posted by Ahmadhosmanbmw335i

Typo error

Nice try.

[Calmwinds]

Originally Posted by Elk

Nice try.

I think so too

[Elk]

Originally Posted by Ahmadhosmanbmw335i

Also my exhaust tips get black really fast is this because the car is a twin turbo?

I don't think anyone answered your second question.

The black sooty deposit shows up more quickly with heavy throttle use; the engine mapping is richer at WOT, normally aspirated or force-fed.

[ƒ°]

Originally Posted by aarena

a long time ago the 335i did. now it has "twin power" turbo, basically some marketing bs to say that the engine has very little turbo lag from its single turbo

It's not just marketing bs. A twin scroll turbo is actually quite different from your conventional single turbo.

http://www.modified.com/tech/modp-09...ng_effect.html

[jon328i]

i think Twin Scroll sounds better than Twin Power Turbo (misleading term)