Fuse 22 remote switch fitted.

[NBTBRV8]

I found this yesterday, OMG, it sounds good!

https://www.youtube.com/watch?v=Pr75dTyyUXk

[Jon1967x]

NBTBRV8 said:

I found this yesterday, OMG, it sounds good!

https://www.youtube.com/watch?v=Pr75dTyyUXk

It's a switch that would only ever be in one position

[R8VBV]

Anyone know where to get these wireless relay switch boxes from in the UK? All I can find is US ebay.

[triple5]

R8VBV said:

Anyone know where to get these wireless relay switch boxes from in the UK? All I can find is US ebay.

Mine came from Amazon UK but they don't seem to stock them anymore, looks like US may be your only option.

[8Tech]

Zuman said:

So - perhaps a bit foolishly - I decided to install the remote switch for fuse 22, together with the changeover relay as detailed here (brilliant write-up!), without first simply listening to my '06 DB9 Volante with the fuse pulled.
The installation was painless, but when I pushed the button on the remote I was very surprised by how little difference it made. Yes, I could hear a little more low-midrange rumble at startup, but the difference was so small that I thought I must have done something wrong.
I then removed the remote setup and re-started the car with just fuse 22 pulled, and it sounded just like when I activated the remote. In other words, just a subtle boost in the low-mids.
Is this the just nature of DB9s of my car's era? Is all the fuse 22 removal glory reserved for V8s?

The fuse mod will make a significant difference to the V12 but if you start it from cold on idle, it is already open!

It is not until you drive the car that you notice the difference. The ECU normally keeps the exhaust quiet until the revs increase or you load the engine, then the valves open. Driving along at mid speed, around 60-70 mph and the car will be much louder without the fuse than with it. If you have used the relay, depending on how you wired it, activating may open or close the valves. On mine, they are always open but activating the relay closes the valves for my "Stealth Mode" when getting near home late at night.

[Zuman]

Thanks, 8Tech. I wired it according to triple5's excellent write-up for the "stealth mode" startup. I'll admit that I only backed my DB9 out of the garage into the driveway after the installation, but I could definitely hear a subtle difference when I toggled the remote.
My wife and I are about to leave for church, so we'll take the 9 and see if we can wake the dead!

[mikey k]

Zuman said:

So - perhaps a bit foolishly - I decided to install the remote switch for fuse 22, together with the changeover relay as detailed here (brilliant write-up!), without first simply listening to my '06 DB9 Volante with the fuse pulled.
The installation was painless, but when I pushed the button on the remote I was very surprised by how little difference it made. Yes, I could hear a little more low-midrange rumble at startup, but the difference was so small that I thought I must have done something wrong.
I then removed the remote setup and re-started the car with just fuse 22 pulled, and it sounded just like when I activated the remote. In other words, just a subtle boost in the low-mids.
Is this the just nature of DB9s of my car's era? Is all the fuse 22 removal glory reserved for V8s?

On the Vantage the fuse changed to 15 around MY12.25
No idea if it alos changed on the DB's as well?

[DAMIT]

mikey k said:

Zuman said:

my '06 DB9 Volante

On the Vantage the fuse changed to 15 around MY12.25
No idea if it alos changed on the DB's as well?

[davidexige]

I dont know about the DB9 but on the Vantage once the engine is upto temperature the default position for the exhaust bypass valve at idle is open, so if the remote is used at this point there would be no change in sound as the valve is already open, I dont know if this is the same on the DB9, but if so it might account as to why there was so little change in exhaust note.

Zuman said:

So - perhaps a bit foolishly - I decided to install the remote switch for fuse 22, together with the changeover relay as detailed here (brilliant write-up!), without first simply listening to my '06 DB9 Volante with the fuse pulled.
The installation was painless, but when I pushed the button on the remote I was very surprised by how little difference it made. Yes, I could hear a little more low-midrange rumble at startup, but the difference was so small that I thought I must have done something wrong.
I then removed the remote setup and re-started the car with just fuse 22 pulled, and it sounded just like when I activated the remote. In other words, just a subtle boost in the low-mids.
Is this the just nature of DB9s of my car's era? Is all the fuse 22 removal glory reserved for V8s?

[hashluck]

I am a little confused by this based on my own experience of a completely standard (i.e. no switch or fuse pulling) V8VS

When I start the car from cold it makes a noise that could wake the dead. Seems the colder it is outside the louder it is. When I start the car when it is warm (even still slightly warm) the whole exhaust sound is a lot more muted. I am fine with it and assume there are good reasons for it (I had thought it was just amount of fuel being used to start the car from cold) but a few recent posts here suggest that I might expect it to be louder when warm (exhaust valves open).

[davidexige]

I think if started from cold the vacuum that’s normally used to operate the valve has bleed away and hence once the car's started it takes a few seconds for this to build back up sufficiently to close the valve. This might account for why it sounds louder when starting from cold.

hashluck said:

I am a little confused by this based on my own experience of a completely standard (i.e. no switch or fuse pulling) V8VS

When I start the car from cold it makes a noise that could wake the dead. Seems the colder it is outside the louder it is. When I start the car when it is warm (even still slightly warm) the whole exhaust sound is a lot more muted. I am fine with it and assume there are good reasons for it (I had thought it was just amount of fuel being used to start the car from cold) but a few recent posts here suggest that I might expect it to be louder when warm (exhaust valves open).

[mikey k]

It can be configured via AMDS so the valves are left closed or open on switching the car off

[Scots Don]

For the record, I have successfully installed the RM02 relay plus additional relay (with normally-closed contact) so that the startup state is "normal", which is to say the fuse is active. All works well on my UK 2006 Vantage V8 (MY 2005.5). Incidentally, it's worth me pointing out that a 20A fuse (the extra relay is rated at 30A) is fine, since the purpose of the fuse is to protect the wiring, not the failure that created the short circuit. Without the fuse, the wiring would melt and create a fire. The wiring is capable of 20A.

Thanks to everyone who contributed to this bril idea!

[Phil57DBS]

Hello at all
when i start my car cold (fuse 22 on) there is too loud crazy sound !!!
and then always below 1500rpm...
impossible for my neighbors...
so please what kind of diagram choose to have quiet sound at cold start ?
and of course loud sound at all revs when i want...
Thanks in advance
Phil
2010 DBS

(Maplin doesn't exist today)

Edited by Phil57DBS on Wednesday 9th May 13:31

[bogie]

Phil57DBS said:

Hello at all
when i start my car cold (fuse 22 on) there is too loud crazy sound !!!
and then always below 1500rpm...
impossible for my neighbors...
so please what kind of diagram choose to have quiet sound at cold start ?
and of course loud sound at all revs when i want...
Thanks in advance
Phil
2010 DBS

(Maplin doesn't exist today)

Edited by Phil57DBS on Wednesday 9th May 13:31

I think what you are talking about is the "flare" (revs) from a cold start and subsequent high tickover with valves open until the engine warms a little. Its normal procedure.

Im not sure, but I hear Bamford Rose do a 3 way remote exhaust valve, not sure if this keeps the valves permanently closed on a cold start though, you would need to check with them......

[IanV12VSRs]

bogie said:

I think what you are talking about is the "flare" (revs) from a cold start and subsequent high tickover with valves open until the engine warms a little. Its normal procedure.

Im not sure, but I hear Bamford Rose do a 3 way remote exhaust valve, not sure if this keeps the valves permanently closed on a cold start though, you would need to check with them......

I had a BR switch fitted on my V12VR and you are right. You can have it loud (valves open all the time) standard and stealth (valves closed all the time) which does give you a quiet start apparently. Never tested it as the car was always in loud

[leerandle]

My car has an aftermarket Tubi 'loud' exhaust, with no by pass valves.

It also has DAE power pack and modified air filters, resulting in extremely loud start up and no chance to change it.

I love it and my neighbours do not. A little bit of curtain twitching goes on when I start it early in the morning.......

[Jibberingloon]

"Edited" Fuse 22 is early Vantage, not sure on the DBS....




2 ways! i have the same


1.)

Turn ignition on and dont push the start button.

Push the remove switch to operate valve (You hear a whiring behind you) wait 3-5 secs

Push start

Flaps in normal mode as if fuse 22 still there



2.)

Buy one of these and wire in the relay (I have the parts but not fitted it yet) this will mean the car starts with flaps closed

https://www.ebay.co.uk/itm/12V-Automotive-Changeov...

Edited by Jibberingloon on Wednesday 9th May 15:44

[Bobajobbob]

I had a switch (Fuse 22) on my 07 Vantage and it was permenantly in the "off" position. There was a clear and obvious difference both at idle and under load. I installed the same switch in my new to me 2013 Roadster (fuse 15) and I really don't notice any difference at all. At idle there is no change in tone and I don't notice an obvious change or loudness under load. I'm sure the switch is working OK as I can hear the relay click. Being a Roadster the car is louder anyway with the roof down but it does bug me that the switch doesn't appear to do anything on the 4.7.

Is it just me?

[bogie]

Bobajobbob said:

I had a switch (Fuse 22) on my 07 Vantage and it was permenantly in the "off" position. There was a clear and obvious difference both at idle and under load. I installed the same switch in my new to me 2013 Roadster (fuse 15) and I really don't notice any difference at all. At idle there is no change in tone and I don't notice an obvious change or loudness under load. I'm sure the switch is working OK as I can hear the relay click. Being a Roadster the car is louder anyway with the roof down but it does bug me that the switch doesn't appear to do anything on the 4.7.

Is it just me?

I had the same experience when i changed from a 4.3 to a 4.7 Roadster, the 4.7 has an extra pair of cats that quiet it down too much. Swap the secondary cats out for straight pipes, Aston dealers do them as option or aftermarket, they are around £500-600 and 90 mins labour to fit.

Then your 4.7 will sound as it should....kind of like a 4.3 with valves open, a touch louder perhaps