VEMS Community Forum

Technical => Wiring & Sensors => Topic started by: Mike h on November 10, 2008, 11:52:14 PM

Title: Pressure tube location
Post by: Mike h on November 10, 2008, 11:52:14 PM
Could someone please give some advice on the best location for the pressure tube? It is going on an Audi V8 ABZ engine. There is an air temp sensor about 2 inches up stream of the throttle butterflies. Would locating it about 90 degrees from this sensor be the best place or is there a better place? Any help would be much appreciated.
Title: Re: Pressure tube location
Post by: [email protected] on November 11, 2008, 07:57:12 AM
Are there no existing vacuum take offs?

If not then I'd stick a pneumatic fitting as close to the centre of the plenum as possible then.
Title: Re: Pressure tube location
Post by: gunni on November 11, 2008, 11:40:07 AM
fuel pressure regulator, either T off that line or close to itÃ,´s connection point,
itÃ,´s chosen to control a major component in the fuel system so IÃ,´d say itÃ,´s connection point is very good.
Title: Re: Pressure tube location
Post by: [email protected] on November 11, 2008, 12:48:10 PM
I would never share a feed with any other device/sesnor as a split pipe ruins the signals for both.
There are nice push-fit fittings available for a few quid from Pneumatic suppliers and RS
(http://store.norgren.com/resources/sku/CompactViewUK/0000002001/2372.jpg)
that can be used.
Title: Re: Pressure tube location
Post by: Mike h on November 11, 2008, 10:57:08 PM
I do have a vacuum line available but I thought the fitting was suppose to go up steam of the throttle valve (between the throttle butterflies and the air filter) .The vacuum line that is available is after the throttle butterflies.
Title: Re: Pressure tube location
Post by: [email protected] on November 11, 2008, 11:28:56 PM
It needs Manifold pressure - so needs to go after the throttle body.
Title: Re: Pressure tube location
Post by: Mike h on November 12, 2008, 12:48:23 AM
Thank you so much.
Title: Re: Pressure tube location
Post by: hilly on November 24, 2008, 10:24:07 AM
Mike

I have sent you a picture of where I hooked up the MAP line on my engine.

Hilly