I would like to install an aftermarket mechanical boost guage in my '03 Cobra, but is there a manifold port or line (after the blower, of course) that I can plug in to? Is this possible?
There is a small white plastic vaccum line running under your dash to your stock boost gauge. It is usually pretty easy to find if you crawl under there. I just got a small T fitting and sliced into that line. It seems to work great. If you cant find it just hanging under your dash you can pull out your gauge cluster and get it from there to
It is a black line( not white) under the dash on the drivers side. It may also be on the passenger side but mine was located straight above the gas pedal, best bet is to pull out the gauge cluster, its only a couple screws.
As was said earlier, remove the glove box ( it will flip down ) and you will see the boost line you need to connect to. Run the line you receive with the boost gauge down and under the dash (use wire ties or something to keep it hidden and out of the way) and behind the radio over to the line in the glovebox. Get a Y fitting from Pep Boys and connect it to the factory line. I think the Y fitting will allow for a more easy transition to the new line than useing a T fitting. This will allow you to also keep your stock gauge functional.