6CTA 8.3 boost gauge feed port

[PsycoBob]

I'm trying to add a boost gauge to my dad's 5-ton, but there is a dearth of information about where to tap into.

There's 3 ports on the driver's side of the intake manifold.

Front one looks like coolant temp.

Middle looks to be usable, as it feeds the IP's booost/smoke control.

Rear port is the same style as the front coolant port, so I'm not sure...

Searches and reading mod threads has resulted in a lot of pictures of dash panels, but no engine pics or comments about where to tap in. Digging through the rest if the interwebs has been equally fruitless.

 

[WillWagner]

The only place there is coolant on the fuel pump side is at the bottom near center. IIRC, on he mechanical head there are 2 1/8 pipe and straight o-ring plugs. Any will work, for the o-ring plug, you will need to drill/tap

 

[cbrTodd]

Here's where I tapped into mine. I drilled a 1/8" NPT hole into the plug while it was out on the workbench, and then reinstalled into the engine. It was easier than making a mount for the gage!

 

[adamsoffroadperformance]

I pulled the tube from the Turbo to the aftercooler and drilled and tapped it.

 

[PsycoBob]

If those are straight o-ring plugs, they may be SAE hydraulic spec. I'll measure the rear one when I have it out.

After poring through the p2p diagrams, I still have no idea what the electrical plug in the front port is for. Time to experiment.

 

[Ford Mechanic]

I pulled the tube from the Turbo to the aftercooler and drilled and tapped it.

I did the same.