Brake Booster Blockoff plug size

[mfewtrail]

Anyone know offhand what thread size this plug is?

[GOT2B GM]

I wanna say 1/2" NPT but thats just off the top of my head.

[mfewtrail]

I wanna say 1/2" NPT but thats just off the top of my head.

That's what I *think* it is too, I guess I'll get off my lazy ass and remove it tomorrow to actually check. :laugh:

[mfewtrail]

I pulled the plug out and it's actually a 3/8'' fitting. I ended up getting a 3/8'' x 1/8'' brass reducer/bushing from lowes to install my boost gauge.

Here's a picture of one for reference...
http://www.plumbingsupply.com/images/bushingthreaded.gif

[GOT2B GM]

Here's what I did on mine. The fittings were free courtesy of my work.

[mfewtrail]

What all do you have sourced off of that? I only have my boost gauge sourced there so I just used the 3/8'' to 1/8'' fitting along with the 1/8'' to 1/4''(?) adapter that came with my boost gauge. Then I ran the nylon tubing along the firewall and through the plug where a clutch master cylinder would mount if one were in my car. I have my gauge temporarily mounted on the steering column for now. I'm going to pick up a spare a-pillar soon to fiberglass a pod to. I'll probably end up with a three gauge pod, I guess I'll install a trans temp & volts gauge to go along with my boost gauge...

[GOT2B GM]

My RFL BOV and my boost gauge run off of there. My boost gauge is also tie wrapped to my steering column. I'm mid way through fiberglassing a triple pod to an extra A pillar I have. It just needs a bit more sanding, and then paint.