Just put on the MSD cap and rotor kit for the early non-vented opti. It comes with two vacuum lines - one to go to manifold vacuum and one to ported vacuum prior to the throttle blades. I read online somewhere about taking that line that they show in their kit being installed into the air intake elbow and running it inside the car with a fuel filter or the like installed.

Any thoughts on this? I'd only seen that in one post on one forum that I found doing a google search. Figured I'd ask before I go drilling holes in that new 1LE intake elbow.

 

The air the flows into the Opti air supply line eventually ends up in the combustion chamber, so its a good idea to take it from a source that has passed through the MAF sensor. Hence, connect it to the elbow, between the MAF sensor and the throttle body. That air has also been filtered.

 

Just be sure it's sealed good so no air can leak. I think they give the drill bit size in the instructions.

 

I too have a 94' with the MSD cap and rotor kit that has the retro-fit vent kit. I ran the air supply from the passenger side compartment under the dash with a small fuel filter on the end of the vacuum line. The theory is it allows dryer air (i.e., heated/air conditioned air) into the opti verses the intake track. It was my hope that it would cut down on corrosion inside the cap. I siliconed my cap as well.......

 

I don't see how this air source guarantees heated/air conditioned air