[AndrieK]

I have an MPX5700AP pressure sensor that I want to connect to an Auber Instruments SYL-1813A digital gauge to use as a boost gauge, which will be located in the centre of the dash where the radio normally goes.

What is the better layout configuration?
1. Sensor in the engine bay with a shorter piece of pressure tube and running the electrics through the firewall, or
2. Sensor behind the dash with the pressure tube running through the firewall.

My dash is still out, so I have easy access to the centre firewall grommet. I want to feed either the tube or electric wiring through the firewall before I put the dash back in.

Opinions welcome...

 

[dkril]

Wiring. Will be more responsive as you don't have to wait for the boost to work down a little tube, and there's no chance of it venting something nasty into the cab.

 

[AndrieK]

Wiring. Will be more responsive as you don't have to wait for the boost to work down a little tube, and there's no chance of it venting something nasty into the cab.

I was leaning this way because of the reason you mentioned, but wasn't sure how big an issue it potentially is.

On the other hand, I suppose I need to make sure the sensor is protected from the elements. Not sure how long it'll last unprotected under the bonnet. Should I perhaps mount the sensor inside a plastic case?

 

[Haggie]

I have an MPX5700AP pressure sensor that I want to connect to an Auber Instruments SYL-1813A digital gauge to use as a boost gauge, which will be located in the centre of the dash where the radio normally goes.

What is the better layout configuration?
1. Sensor in the engine bay with a shorter piece of pressure tube and running the electrics through the firewall, or
2. Sensor behind the dash with the pressure tube running through the firewall.

My dash is still out, so I have easy access to the centre firewall grommet. I want to feed either the tube or electric wiring through the firewall before I put the dash back in.

Opinions welcome...

Another vote for wiring. I have the same indicator but used the Auber transducer. It comes nicely shrouded for protection against the elements.

 

[AndrieK]

Another vote for wiring. I have the same indicator but used the Auber transducer. It comes nicely shrouded for protection against the elements.

Thx for that Haggie. I haven't ordered the gauge yet. I have one for EGT's and wanted a matching one for boost, but I already have the pressure transducer because originially I wanted to build my own gauges using an Arduino board. I gave up on that idea because I couldn't get an accurate EGT reading.

I was contemplating ordering the gauge with a sensor, so based on your experience, I might just do that anyway.

Back to the original question, I pulled the wiring through the firewall today. All done and ready to go as soon as I get the gauge.

 

[AndrieK]

Another vote for wiring. I have the same indicator but used the Auber transducer. It comes nicely shrouded for protection against the elements.

@Haggie, do you remember which transducer you ordered with the gauge?

 

[Haggie]

@Haggie, do you remember which transducer you ordered with the gauge?

From memory no but it does look like the 303. Which looking at the table would make sense?