LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Deleting Smog Pump

Old Sep 14, 2010 | 10:42 PM
  #1  
drennon1's Avatar
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From: Louisville, KY
Deleting Smog Pump

So I did a search and came up with no answers I know there is no HP benefit I just want some more space under the hood. I cant find any info on the belt. Can it be re routed or do I need a new size or both??? No emissions testing and my cat is gone.

94 Lt1 4L60E
Old Sep 14, 2010 | 11:01 PM
  #2  
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The AIR (smog) pump on your LT1 is not driven by the serpentine belt - it has an electric motor. Unplug it. Unbolt it. Remove the plumbing. Cap the air supply connection on the air intake duct (5/8" vacuum cap). Put 22mm oil drain plugs in the manifold holes. If there is a good fuse in the AIR pump circuit, you will not get any codes for the missing system (OBD-I only).
Old Sep 15, 2010 | 08:01 AM
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what are advantages and disadvantages of doing this??

lol nvm just read the 1st post sorry
Old Sep 15, 2010 | 08:09 AM
  #4  
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you save a wee bit of weight. The pipe, fittings, pump and bracket come in at about 5 lbs.... at least mine did.

you might save a slight amount of current draw on the alternator during AIR pump operation on start up... this might translate to a few drops of gasoline saved... but that is speculation because I don't have proof

you don't get a vacuum cleaner sound during start up.

Those are advantages I can think of besides the cleaner looking engine bay.
Old Sep 15, 2010 | 08:13 AM
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Thanks for the info man
Old Sep 15, 2010 | 09:37 AM
  #6  
drennon1's Avatar
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That is my fault I just assumed that it was belt driven since the 3rd gens are and I didn't look!
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