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Smog Pump

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Old Feb 4, 2012 | 02:19 PM
  #1  
Firebird_305's Avatar
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From: Robertsdale, AL 36567
Car: 1992 Pontiac Firebird
Engine: 5.0L TBI
Transmission: Automatic
Smog Pump

Hello everyone! I did my research and found out that no one had a question on this. I replaced my manifold on my pass side for a few reasons. While doing so I was planning on removing the smog pump pulley and running a shorter belt. I ordered the wrong size belt (too short) and pretty much have to wait to get a new belt on monday when part store opens.

My question is this. Can I put my smog pump pulley back in place so everything will route properly, but leave it disconnected? Will this chew my belt apart or cause any problems. I feel that it should be able to spin freely without it being connected. I just need a confidence booster please
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Old Feb 4, 2012 | 02:26 PM
  #2  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Smog Pump

I'm going to say yes, but I don't understand what your concern actually is.
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Old Feb 4, 2012 | 02:37 PM
  #3  
Firebird_305's Avatar
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From: Robertsdale, AL 36567
Car: 1992 Pontiac Firebird
Engine: 5.0L TBI
Transmission: Automatic
Re: Smog Pump

My concern would be the belt breaking apart or something extremely bad happening. I figured it would be ok though, thanks for the confidence booster!
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Old Feb 4, 2012 | 02:40 PM
  #4  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Smog Pump

It ran for years with a belt on it before, what's different now?
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Old Feb 4, 2012 | 02:52 PM
  #5  
Firebird_305's Avatar
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From: Robertsdale, AL 36567
Car: 1992 Pontiac Firebird
Engine: 5.0L TBI
Transmission: Automatic
Re: Smog Pump

Haha you bring up a valid point! When it is connected what is the purpose? Just to allow 'clean' air on start up? So without it connected but still being in place, it will just serve as a heavy pulley??
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Old Feb 4, 2012 | 03:02 PM
  #6  
Apeiron's Avatar
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Smog Pump

It blows air into the manifolds or cat under certain conditions to provide additional air for the reduction of CO and HC emissions. The rest of the time it's venting to atmosphere, just like it is now when it's disconnected.
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Old Feb 4, 2012 | 07:17 PM
  #7  
VincentZ28's Avatar
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: Smog Pump

If you're trying to gain HP, Try installing an electric water pump. Out of all the pullies it has the most drag. Leave the smog pump alone.
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Old Feb 4, 2012 | 09:58 PM
  #8  
Firebird_305's Avatar
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From: Robertsdale, AL 36567
Car: 1992 Pontiac Firebird
Engine: 5.0L TBI
Transmission: Automatic
Re: Smog Pump

Nope not trying to gain horsepower. I replaced my pass side manifold cause the studs connecting the y-pipe to manifold were broken and bolts were broken in the head so I got a replacement one. The replacement doesn't have any connection for the smog pump so I was going to remove the pulley.
I'll worry about HP when I get everything else done
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Old Feb 5, 2012 | 03:37 PM
  #9  
RSCAMAROGUY91's Avatar
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From: Maynardville, TN
Car: 1991 RS Camaro w/ Factory T-Tops
Engine: Built 355 ci SBC w/ Carb
Transmission: Borg Warner T-5
Axle/Gears: 4.10 with Posi-Trac
Re: Smog Pump

You'll probably have to remove the pump completely. I had to do that on mine when I put my headers on. The headers I used didn't have any ports for the A.I.R. system, so I removed the pulley and the belt rubbed against the pump, so I pulled it the rest of the way off.
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