so from a reading around the interwebs, it appears that our exhausts in the 280 are pretty much the same as the golf R (strangely).

 

the flaps open up for a bit extra noise. 

 

[disclaimer - I have done this to my car, if you decide to do it to yours, its your choice]

 

if you want to open them up fulltime, you can either disconnect them via the connector on each side of the exhaust (and tape it back up), or disable via vcds. note that with the VCDS way, you need to fully power down the car before the coding takes effect. 

 

engine [01]

 

Coding, byte 9

 

bit 2 - tick for normal operation, untick to keep them open

 

I keep hearing the flap open & close during cold times when the car is started up so obviously I also want to know: when does it open under normal conditions? I will get the VCDS coding when my friend can come by whose done it.

My understanding is the flaps open at full throttle.

 

I disabled mine using ODBEleven. They're always open. You get a little more rumble lower down in the revs, but really I don't think you can notice any difference.

The flaps on these cars to me at least, are pointless.

They open well before full throttle. After much experimentation over 5 years with the flaps open and closed I have discovered :

 

a) With the flaps open the top speed of the car was 165mph with them closed it was 155mph

b) 0-60 With flaps open was 4.3 seconds with them closed was 5.9 seconds

c) The car sounds like a herd of stampeding Buffalo with the flaps open and with them closed sounds like the Mrs's Revlon Hairdryer albeit at 'High' on the power switch.... 

At the risk of being censored I'm gonna resist the obvious statement.

17 hours ago, Colin170CR said:

At the risk of being censored I'm gonna resist the obvious statement.

 

Maybe not so obvious I've no idea what you are on about

According to the guys at exhaustsuk, the golf r flaps are 1/4 inch bigger than the skodas 

Edited 18 February, 20215 yr by Bigeater

1 hour ago, Bigeater said:

According to the guys at exhaustsuk, the golf r flaps are 1/4 inch bigger than the skodas 

 

Flap Size Envy .... It's real !

Old topic but I assume the flaps are closed but default ? as the ones on my car are open all the time Iv not looked in to them ATM on the never ending list But I have some springs on the way.

It's been a long time .... When the cars sat on the drive at idle they are closed when you blip the throttle they open or at least they used to .... I think ....

mine seem a bit weird.

Engine off car cold - Flaps open

Engine just started and on tick over (just over 1k rpm) flaps closed

Engine settles down to tick over (just under 1k rpm) flaps opened

This is whilst in 'Normal' or 'Eco' mode.

If I run a flap test with VCDS only one opens and closes, however with the above both flaps operate.

Flaps enabled in VCDS, so really dont know what is going on.

Seems very random.

Edited 18 July, 202518 Jul by s88urd

It makes sense when the car's off to have open flaps; that'll be to make sure its vented and you're not building up moisture (its not designed to predict or determine how long the car's going to be off for, and also if its had multiple short runs it'll have steam to vent as pooled condensation starts to boil off).

Might be something to do with back pressure. Had them on my E36 328i and they were operated off a vac pipe which ran the length of the car starting from the inlet manifold. So I think its increased air speed on the inlet causes lower pressure which then sucks on the vac pipe and opens the flap i.e. more throttle opened the flaps. Maybe idle tickover resorted to an open stage anyway.