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Old 08-28-2014, 07:23 PM   #1
freetors OP
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Joined: Feb 2011
Location: Collinsville, OK
Oddometer: 804
Aston Martin exhaust valve switch

A friend of mine has a very nice, pristine Aston Martin V8 Vantage with about 4000 miles on it. These cars have valves in the exhaust that quiet it down at lower engine speeds like so many other cars today. He has found that if you remove a certain fuse it disables the vacuum pump that opens/closes the valves. He wants me to help him wire in a switch so he could turn it on and off at will. Since this car is so nice and pristine I just can't go cutting into the factory wiring. What would be the best way to wire in a switch that could be completely reversible in the future? I was thinking about some kind of "dummy" fuse that would just go straight through, allowing me to wire in an inline fuse and then a switch somewhere in the cockpit.
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Old 08-28-2014, 07:54 PM   #2
wadenelson
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Location: Durango CO, Huntsville AL
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Dummy Fuse / Fuse Shunt

Here's what you're looking for.

$40
http://www.matcotools.com/catalog/pr...CK-CONNECTORS/


Same thing for $7. Matco committing highway robbery, imho...
http://www.usatoolwarehouse.com/usat...0-p-GTC03.html

$18
http://www.esitest.com/307-308.html
Cut the wire, insert a switch. This is how I'd do it unless there isn't room on top of the fusebox.

$7
http://www.ebay.com/itm/10-ATM-Mini-...item2c841e7ab1

use a pair of these with a BLOWN fuse. Lowest profile solution.
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Old 08-29-2014, 02:35 AM   #3
freetors OP
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Thanks! That's exactly what I was thinking of! I just couldn't figure out the right terms to get google to find it for me. It was such an obvious idea that it had to exist.
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Old 08-30-2014, 04:24 PM   #4
SByota
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My 2007 BMW 335i had a similar vacuum operated exhaust valve. The valve was set up to be closed with vacuum and open with normal atmospheric air pressure. All I did was pull the vacuum hose off the valve and plug each side with a cheap plug from the local parts house. The car didn't know the difference and it was easy to switch back when I sold it.
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Old 08-30-2014, 07:26 PM   #5
freetors OP
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That's probably what I would do if it were my car, but this guy is really not mechanically inclined at all. And he wants the option to quickly and easily change back at will.
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Old 08-30-2014, 09:17 PM   #6
GreaseMonkey
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You may not have room in the fuse box. Another option is to find the terminal on the vacuum pump and wire it in there, just get a male and female of whatever connector they use and put that on some twin lead wire, then run the twin lead up under the dash and wire a switch across the 2 wires.
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