About to buy one - 340 vs 380 hp

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Aug 27, 2020 | 04:51 AM

#21

scm

Veteran Member

Joined: Jan 2010

Posts: 4,830

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From: Southampton, UK

Quote:

Originally Posted by DJS

No, valves only open under load in dynamic. Without switchable active exhaust, only way to have the, open 100% of the time is pull F43 (MY14-15).

MIne opens at tickover in dynamic - exactly as takeapleandrun states. Maybe a later MY thing?

Aug 29, 2020 | 04:10 AM

#22

takeapieandrun

Senior Member

Joined: Feb 2019

Posts: 439

Likes: 121

From: Bay Area CA

I'll have to do a test with my '16 too. Battery's dead right now but getting my charger tomorrow

Aug 29, 2020 | 04:30 PM

#23

StormtrooperFtype

Senior Member

Joined: Dec 2018

Posts: 341

Likes: 73

From: South Florida

Quote:

Originally Posted by takeapieandrun

Here's what I understand from the active exhaust:

Dynamic Mode: Always open
Active Exhaust Button: Open at 1500rpm
Otherwise: Open at 4000rpm

What does pulling F43 achieve?

This is what I believe to be true, but I've had them be open below 1500 in dynamic (with button on) especially in manual mode in 1st gear. Maybe they are different on the R, but for me it's around 4000, maybe a little more or less depending on throttle input that they open regardless of which mode im in. I've pulled fuse f43, I never noticed any changes. But maybe when you have the switchable exhaust its different then the normal active exhaust.

Aug 29, 2020 | 04:37 PM

#24

scm

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Joined: Jan 2010

Posts: 4,830

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From: Southampton, UK

Quote:

Originally Posted by StormtrooperFtype

This is what I believe to be true, but I've had them be open below 1500 in dynamic (with button on) especially in manual mode in 1st gear. Maybe they are different on the R, but for me it's around 4000, maybe a little more or less depending on throttle input that they open regardless of which mode im in. I've pulled fuse f43, I never noticed any changes. But maybe when you have the switchable exhaust its different then the normal active exhaust.

That's what was said - in dynamic it's always open (which includes below 1500!). The 1500 only comes into effect when out of dynamic and the switch is on. the 4000 happens regardless of switch postion in both dynamic and non-dynamic modes.