on the intake manifold I teed the vac/boost gauge off of the same line that runs to the EZL ignition module (which references from the plenum rather from an individual runner). Since it is directly on the plenum and the EZL is completely sealed, I figure it should be a pretty accurate manifold vac/pressure reference point (rather than the transmission vac line which comes off the #6 manifold runner). Nothing whatsoever done to the fuel system really, I took the vaccum line from the fuel pressure reg and ran it into the tube that my bypass is mounted on so that it will exert a little bit of pressure on the regulator diaphragm (since the jetronic unit adjusts it's reference pressure against the resistance of the MAF this really doesn't do anything, but I like the idea of keeping fuel pressure in check with the boost pressure). Other than the supercharger and tubing, the engine is basically bone stock in every sense.

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-1989 190e 2.6 Auto (t3/t4 hybrid turbo)