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Jim2 Jim2 is online now
7.0:1 > 11.3:1
Join Date: Oct 2003
Location: Calgary
Posts: 1,865
Chris, I considered an external manifold for mine but I found it was easy to route all vacuum lines and wires bundle together so they came from the front drivers side of the engine bundled with the brake booster hose.

A couple other ports to consider:

Air temp probe for EFI system
Vacuum/boost port if you run a mechanical boost gauge
Boost port if you add a mechanical adjustable boost regulator

I also added ports for diagnostics so I could measure pressure and temp both upstream and downstream of my throttlebody as well as before and after intercooler.

It was easy to hide all the ports on the rear or underside of the intake plenum and also in hidden areas of the inlet plumbing.

Regarding ports size I used both 1/8 and 1/4 npt. Only need 5/32" vacuum tubing for devices like boost gauges and FPR, but I used the 1/4 npt ports and 5/16 tubing to minimize signal response lag to items like the wastegate and brake booster.

Last edited by Jim2; 05-28-2007 at 10:18 AM..
Old 05-28-2007, 10:02 AM
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