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.

[ClayPerrine]

I did this for Betty's car. I don't know if it really helped., but It makes a difference on the "butt dyno".

Easy to do too. Just about an hour to do all the work. And I fixed it so that there are two screws holding the throttle switch assembly to the body. One is inside, and one on the outside.

[jim_hoyland]

I did this for Betty's car. I don't know if it really helped., but It makes a difference on the "butt dyno".

Easy to do too. Just about an hour to do all the work. And I fixed it so that there are two screws holding the throttle switch assembly to the body. One is inside, and one on the outside.

Clay, DiD you use the 1.8 TPS on the Vanagon TB ?

[ClayPerrine]

I did this for Betty's car. I don't know if it really helped., but It makes a difference on the "butt dyno".

Easy to do too. Just about an hour to do all the work. And I fixed it so that there are two screws holding the throttle switch assembly to the body. One is inside, and one on the outside.

Clay, DiD you use the 1.8 TPS on the Vanagon TB ?

I used the 1.8L TPS (It is actually just a throttle switch). One of the screw holes matches up exactly, the other ends up inside the cover. I just made a pin out of a screw, and mounted the throttle switch with the one screw. The point on the pin marked the back of the metal where the other screw goes. So I used the drill press to carefully drill a small hole in the backing plate, and I was able to attach the throttle switch with two screws.

There are some visible external differences. The idle screw is recessed, and there are some ribs on the outside of the Vanagon throttle body. But with how far down it is buried in the engine compartment, it is really not visible.