Leaving Off Air-Pump?...

[chris142]

My scout had vacuum wipers. They would stop when I stepped on the gas or climbed a hill.

 

[snicklas]

Not sure of the other 2, but even into the 6.0 trucks..... Ford still loves to use vacuum. They have gone to hydroboost 4 wheel disk brakes (Thank God in a 7000+lb Excursion), but I have a nice little electric vacuum pump mounted to the passenger inner fender about the size of a shoebox. This still runs the HVAC Doors, and it operates the vacuum pulse ESOF front hubs. That is all it does. It in NO WAY HAS THE ABILITY TO RUN VACUUM BRAKES!!! Just wanted to make the clear in case someone thought they could "upgrade" to an electric off a SuperDuty truck and still run the old vacuum brakes. If you swap to the F-Superduty Hydroboost, you could get away with an electric vacuum pump, or a marginal mechanical vacuum pump.......

So in short so no one gets hurt....

Hydroboost brakes + Electric Vacuum Pump = Good

Vacuum brakes + Electric Vacuum Pump = NO POWER BRAKES or BAD!!!!!!

 

[ToughOldFord]

The purpose of the "smog pump" is actually to pump air into the base of the exhaust valve. On paper is burns off the unburned gas exiting the exhaust post. Thats on paper. What it REALLY did was dilute the exhaust with outside fresh air. So the tail pipe monitor saw a cleaner exhaust.. so in short the solution to pollution is dilution... Nothing more really. Can the smog pump be called an air pump. Either way works.

That's true, and some manufactures didn't try to hide the scam. Instead of routing the air to the heads they just plumbed it downstream in the exhaust system.

Didn't clean the air an iota, but it measured "cleaner" out the tail pipe on the sniffers.

 

[snicklas]

Yep, we had an 85 E-150 Carbd 302. There was a "Y Pipe" that bolted to the back side of each head into the exhaust ports for the last 2 cylinders. There was a large hose from the air-pump to the back of the engine and connected to this Y Pipe. Eventually the Y Pipe would rot out where it connected to the heads. The crossover pipe was a thin-walled tube that was attached to 2 cast blocks that bolted to the heads. This would cause an exhaust leak at the back of the engine.......

 

[BDCarrillo]

Later EFI 5.0s had the air inject into the back of the head AND into the exhaust right before the cats. Gaming the EPA...