So much pointless terror about removing the smog system lol....
Its not the same as the EGR system.
Here is how to do it on the 89 to 96 302 set up and a simplified explanation of what of what it does I made a ways back:

https://www.ford-trucks.com/forums/1...l#post19042519

 

Deleting the EGR system is pointless.
Its an emissions system yes but it also keeps your engine running cooler and thus better mileage and better for it all around.
Its a huge pain to remove it and it will throw codes to the PCM which will try and compensate for the change in exhaust and air intake readings resulting.
They sell a chip you can plug into the sensor it plugs into but I've read a lot of problems with this too.
The smog system is a secondary air pull system that adds fresh air into your exhaust stream. Essentially the addition of air helps the exhaust burn the hydrocarbons more efficiently as they dwell in the eshaust system before exiting to the atmosphere.
This system too doesnt really have any detrimental side effects to performace but it doesnt add anything either like the EGR does.
UNLESS you have broken hoses or leaks in the system especially behind the block with the vacumm lines going to the check valve etc.
I pulled mine out because I love having as much room in the engine bay as possible.....and mine was leaking in a couple spots lol

 

This should explain it. Again it is for a 460. To simplify, remove air pump and all connected hoses/tubes. Cap off lines at converter where air injection goes in, or replace with universal non air injected converter. Figure out what belt length you need. Replace belt. Cap off unused vacuum line at solenoid.
Do NOT delete the EGR. It is a separate system not directly related to air injection.
Again my 460 may be different than your small block. You may have to plug your heads, I did not have that issue on my 460, as the air injection went to a single bung on my manifolds, that i replaced with a Banks exhaust system. Hope this helps. It sounds confusing at first, but, take some time to look at the system, wires, pipe, vacuum lines, and it will make more sense.

 

deleting the smog system will cause less drag on the engine due to not having to turn as many pulleys with the belt which frees up a small amount of power and mpgs, it also makes the engine run healthier because injecting exhaust gas into the engine causes faster engine wear, poor fuel economy, and yes power loss. The cleaner and cooler the air/fuel mix is the better the engine will run so I’d absolutely remove it just like I do with cats because restrictions cause the same issues

 

That is not what the smog system does, it helps converter to burn harmful gases, the EGR helps to control a certain amount of unburned hydrocarbons by recirculating some of the exhaust gases back into the combustion chambers, and another benefit of the EGR is to help control pinging, and actually helps cool down the combustion chamber. Our motors do not like ping, I know, because mine just bent 2 connecting rods, because I hadnt gotten the EGR pipe fixed, now it will be an expensive EGR pipe, as my wife made a haul of fire wood to her Aunt.

 

EGR also improves low/part throttle fuel efficiency, as it displaces a portion of the air-fuel charge with inert gas, effectively reducing displacement. As torq stated above, the "smog" and EGR systems are two different animals.

 

Wrong, EGR causes BETTER fuel economy. EGR only operates with part throttle, cruising down the hwy there is no power loss. WOT there is no EGR functioning.

Contradiction, EGR causes LOWER cylinder temperatures, that is exactly why you get better MPG.

 

This is my link on the air pump delete, hope it helps, and yes, if done right, you can delete the entire air pump assembly. I am assuming by smog pump and air delete, you are using different terms for the same thing?

https://www.ford-trucks.com/forums/1...e-project.html

If you are not running headers, you will see in this write up where you have to plug the factory manifolds. There will also be a plug at the catalytic converter you will need to figure out.
I now have several thousand miles on this delete, including 3 trips over Snoqualmie pass, towing our 9,000 pound 5th wheel, with no issues.

 

You forgot to mention yours is 460 specific.
302/351 have tubes running into the heads you have to plug the heads, Van E-series heads are already plugged.

 

Does all this injected air mean that an AFR gauge - which is really only looking at the amount of O2 - will read incorrectly if an engine has a Thermactor system?
[Truck: 1982 F250 HD, non-catalyst but with with Thermactor & EGR]

 

No, O2 sensor is upstream of where air is dumped into CAT.

And, when in open loop(cold), O2 is not being used. The Thermactor system will divert air depending on engine temp, and many other variables.

 

At best, that will be both truck dependent and where one chooses to install the O2 sensor for the AFR gauge. Again, as stated for mine: non-catalyst - there is no cat. Further, the air injection points on mine are in the exhaust manifold- no way to get upstream of that; some descriptions of the Thermactor system state that it relies on the heat in the exhaust manifold to cause the burn off, implying that all that unmetered O2 in excess of what's needed goes down the exhaust pipe.


That may be the key to adding an AFR gauge: also add some mechanism to put the Thermactor in its by-pass mode and only take the AFR reading seriously when this is engaged.

 

"Upstream refers to air added at or near the exhaust ports. This is done to

provide better oxidation of the exhaust gas mixture when a richer exhaust gas

mixture is anticipated. It is not possible to operate in closed loop fuel

control while air is introduced upstream (the EGO sensor may always indicate

a lean condition)."

 

my Thermactor air injection system is disconnected from the catalytic converters. Do the pipes go from into the cats or is there only one going in just before the catalytic converter?