If you don't want to pass through the firewall, you can tee into the MAP line that runs down to the logic module in the right kick panel. Then you just string the line from the kick panel to wherever your going to mount the gauge. Do yourself and others a favor and mount the gauge where you don't have to take your eyes off the road. Mounting it to the drivers side "A" (windshield) pillar is a good place. Hope you bought a mounting cup to go with the gauge purchase.
Yes, but the line length will be a bit longer than running it through the firewall. The engine uses the MAP line, so if it's good enough for the engine ECU, it is good enough for your gauge. This way you don't have to deal with a plastic line in a hot engine bay.Thank you for your reply. Got it. Is it just as good/accurate to "T" onto the MAP line in the kick panel as it is to take it through the fire wall into the engine compartment?
I have a 1986 GLH. I am wanting to install a Boost gauge. I should be receiving my gauge today. I need some help on where to connect the vacuum line from the gauge. Any help/direction would be greatly appreciated.
All good comments by others.Thank you for the great information. I actually found the spare/capped vacuum line that is left on the factory vacuum harness. I went direct to that line and my gauge is working great. Decided to put the gauge in the left vent in my dash. I do not have A/C on my GLH so giving up the vent was no big deal.
A vacuum block is a very simple device with no mechanical moving parts.Since I have installed a boost gauge I now have ordered a vacuum block and want to install with all new vacuum lines. I have done just a little reading on here on the vacuum blocks. I am a little concerned about getting into re-running the vacuum lines. Any input on this would be appreciated. I will take some pictures of my car and post soon. Thank you in advance.
Ok well then just remove the split loom on the original harness, buy 1/8" hoses in Neon Pink, Lime, Fuchsia, and Neon Blue......The main thing I like about vacuum blocks is I can see where each hose goes.
The original vacuum harness is too convoluted
I think you meant to say gets vacuum from intake manifold not valve cover right?A vacuum block is a very simple device with no mechanical moving parts.
It's a round, square or rectangular piece of metal or plastic that has two operational sides.
On one side is a port that gets vacuum from the valve cover via a rubber hose.
Inside the block is an hollow chamber....
Yes, Thanks for catching that.I think you meant to say gets vacuum from intake manifold not valve cover right?
One mod I do many times on cars with 2 piece intakes is I drill and tap manifold for a vacuum/pressure port for a single very short line running to the fuel pressure regulator. Then run about 4-6" of silicone tubing instead of the factories 4-6' of tubing. The 4 into 1 barb will live a much longer life if you move it away from the heat source of the turbo. The factory could have really helped themselves and others by doing that one simple relocation.