Converting a Vanagon TB for use with 1.8 L-Jet, How I did it Options

[MrKona]

There's currently a thread about using L-jet from a 1.8L engine for a 2.0 with discussion about using bigger bore throttle body from a later Vanagon.

I tried it but ran into an issue with the orientation of the flat on the shaft that engages the throttle body switch component used with L-Jet.

Pictures are worth a thousand words, so here goes..

Here's the TPS and a picture of each TB with the plate in the throttle closed position. Original 1.8 L-jet on the right, Vanagon donor TB on the left. Notice the different orientation of the flat on the shafts. The flat engages a corresponding flat on the TPS. The flat on the Vanagon shaft is in the wrong position for the TPS.

[timothy_nd28]

I was going to buy a used Vanagon throttle body, but then realized the cost of a used throttle body and then the cost of the rebuild and modification. The GoWesty throttle body use double sealed ball bearings for the throttle shaft, which is an upgrade over the oem bushings. I can be completely wrong, but I view the GoWesty a step up from the Vanagon mod.

The one thing that confuses me is where GoWesty put their vacuum port, it's dead nuts in line of the throttle plate. So would this be manifold vacuum or ported vacuum?