Tee for installing boost line in map line

simone0414 · #1 (**permalink**) 10-27-2009, 11:24 AM

My truck came with aftermarket gauges when I bought it & they are all hooked up but the boost gauge. The gauge is in place, wiring is done & boost line is run to the engine bay. Just needs to be installed. I think I will go with teeing into the map line but I don't have a tee.

What kind of a tee do I need to get? Will any type of tee do or do you have to get a special one for this application?

gtspowerstroke · #2 (**permalink**) 10-27-2009, 11:37 AM

I typcially get a brass T that has 3 1/8" pipe female fittings on it. The fitting that comes with the gauge will go in the middle one and then you get two 1/8" pipe male to 1/4" hose barb fittings to go on either side. Cut the MAP line and install T and youre set! Don't forget to put some wire loom on the hose to the gauge to protect it and tidy it up.

simone0414 · #3 (**permalink**) 10-27-2009, 01:41 PM

Thanks for the info. Sounds pretty simple but my problem is I don't have the fitting that came with the boost gauge. The previous owner installed these gauges & I never got the fitting from him. Is it the same type of fitting that a mechanical oil pressure gauge has? I assume it is a compression fitting. Hopefully I don't have to buy a whole new guage just to get the proper fitting. It is a Sunpro gauge by the way.

gtspowerstroke · #4 (**permalink**) 10-27-2009, 02:25 PM

You should be able to get that fitting. It's just a 1/8" pipe male to 1/8" compression.

simone0414 · #5 (**permalink**) 10-27-2009, 02:28 PM

Right. I am pretty sure I have seen them at my local hardware store. Should be pretty simple.

Thanks

simone0414 · #6 (**permalink**) 11-01-2009, 08:37 AM

Went to my local hardware store & found some parts to make it work. Got a galvinized water pipe tee ( couldn't find any brass ones), 2 male brass fittings to screw into the tee & a brass compression fitting for the gauge line. Spliced into the map line & it works.

Just one question though. I have never had a boost gauge before so this may be a dumb question but should the gauge be reading something the whole time the engine is running or only when your driving & coming on to her? Mine reads nothing when idling or driving normally. When I get on her the gauge reads from 8 to 12 psi & when I really get on her I have seen it as high as 18 psi. Does this sound normal?