Air pump

[fomoco01]

On my CV HO conversion i would like to get rid of air pump. Emissions standards are weak at best in my state. Any helpfull info would be greatly appreciated.

[Archangel]

If you're in a hurry just remove the pump, all its hoses, plug the vacuum lines for the diverter valves, and that should be pretty much it. If you wanna do it the right way you take off the air pipes to the cats and block the holes in the cats, if the HO heads have the air pipe in the back of the engine remove that one too and block the ports in the heads, and last but not least either pull the old vacuum lines off the main tree at the solenoids and cap the tree's ports, or compeletely redo your vacuum system. The belt you need to bypass the smog pump but still run the A/C is K560 IIRC.

[p71towny]

To give warning tho, I did have a problem when my ac would be on as my belt would work its way back. I plan on installing the eliminator pulley when its all said and done.

[Archangel]

The belt works its way back? Does that mean it falls off the pulleys?

[p71towny]

Thats what mine did, but only when the ac compressor would kick on.

[Freshmeat]

Fomoco! Glad to see you made it! It's always nice to see when people actually listen to me when I tell them about how great the guys are here.

How's the swap coming along? Did the information I provided help you any?

[Archangel]

p71towny, that's kinda strange - maybe you didn't set the tension properly? I had the poly-V belt run on a misaligned smooth-back pulley for some time, but it never came off.

[87mefull]

Is there a noticeable difference if you don't run the smog pump?

[Archangel]

Assuming your smog pump is in good working condition the drag it creates on the engine isn't that noticeble, at least in my case it doesn't matter if it's there or not. Removing it may free like 1-2hp, but it mostly allows you to clear up that mess of hoses and valves that is completely irrelevant to the proper operation of your engine and is also aesthetically unpleasing. Most people here seem to drop the smog systems cause the pump has seized or is about to seize, and also cause it makes for easier access to sparkplugs and suspension components. I have had my engine without the air pump, then with the pump connected to nothing, and now with the pump blowing air through the A/C system - there hasn't been any difference in mileage or performance. I only run the smog pump cause everyone else hates it, thus it makes my car different from your common Panther

[grandpaslincoln]

I've had one of those air pumps apart once, ball bearings in teh front and needle bearings in teh back, it's all low friction. The only thing that really provides any resistance is the air vane inside.

[Roach III]

I noticed quite the difference when I disabled mine. And no, it wasn't about to sieze up or anything.

[Mercracer]

As was mentioned in another thread.. Don't run cats without an air pump.

[Roach III]

I thought the cats were pumped with air for just a short time on startup only.

[Mercracer]

I thought the cats were pumped with air for just a short time on startup only.

Air is injected during warm running as you are cruising down the road as this is when you most need it. It is dumped to the atmosphere during warm idle so that the converter doesn't overheat.

[Tiggie]

The reason I dislike the smog pump is 1.) small draw of horsepower and 2.) That noise it makes. It just makes a good engine sound like a smogged out hunk of junk when ever the rpms increase.