Valet Switch? Fill me in what is it? how it works?

 

Its an electric solenoid and some airline. You remove the factory pressure line that goes from the head to the back fo the AFC housing and install the new line with the solenoid in between. With the switch off the AFC will move forward normally with boost pressure. With the switch off, boost pressure never reaches the afc so it never moves forward. This means that where you have the starwheel set is all the rack travel you will get (the governor arm never reaches the plate).

 

Another inexpensive solution is to put a ball valve shut-off in the air line going between the intake (or turbo) and AFC. The thread size on my 96 was 1/8 NPT and I replace the short hose with plastic hard wall air line and place the ball valve under the dash. It works great and cost less than $5.00 in parts plus I didn't have to wire anything. I have not noticed any difference in lag due to the added hose length.

 

Basically it is for the high HP guys that want to make their truck good daily drivers. Willys91 has one and his truck puts out 750hp with the switch off and it limits it down to 400 or so to keep the manners good on the street and MPG good.

 

All the valet does

im simple terms, is take the plate out of the equation. You are basically running off RPMS using only the injectors and delivery valves....

Rick

 

Or in my case it makes the stoopid pump and act like a stock pump. It takes the truck in my sig from 749HP to just a tick under 500HP and fuel milage from 14mpg. full fuel to 20 in valet mode.

 

Cummins4life hit it right on the head how the commercial units were built, and what they do. I use a shutoff ball valve between the AFC and the manifold pressure port controlled by a choke cable mounted under my dash - cost $4 when I did it years ago.