Hi All,

I have a professional products 58mm throttle body with the dreaded non isolated IAC passage way commonly seem with aftermarket throttle bodies. I am chasing split BLM's at idle and this was one of the solutions to keep air out of the main plenum at idle. I counterbored and press fit in an aluminum tube, the BBK gasket uses a round hole around the IAc hole so it seals the tube perfectly. I have seen this done with copper tubes and epoxy but couldn't get over the idea of epoxy coming loose and going into the engine.

 

did it work

 

This has worked great, I had to open up the "drill hole" to give more air as air was not bleeding into the plenum anymore.

 

kool, added to the lt1 faq sticky