LT1/LT4 Tech 1993-1997

Aftermarket TB IAC Isolation Solution

  #1  
Old 05-15-2019, 09:46 PM
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Default Aftermarket TB IAC Isolation Solution

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.


 

Last edited by NorthernCrew454; 05-15-2019 at 09:49 PM.
  #2  
Old 05-19-2019, 07:45 AM
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did it work
 
  #3  
Old 05-21-2019, 08:26 PM
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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.
 
  #4  
Old 05-24-2019, 10:29 AM
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kool, added to the lt1 faq sticky
 
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