I was reading this post over the TDR, and was wondering what a valet switch actually does....

http://www.turbodieselregister.com/f...threadid=83851

 

In a sense it detunes the fuel side by restricting the boost in the AFC line between the intake manifold and the AFC unit on your injector pump. They use it on the bigger HP engines for a more streetable condition.

ramguy

 

So is there any purpose to install one on the 12 valve trucks. Also how do you install one of these, and will they hurt the engine/drive train?

 

This again is a product for Heavily Modified trucks to make it so you can drive down the street without leaving rubber and pavement on your mudflaps..

J-eh

 

what about if you have no rack stop or Waste gate ???
DM01

 

The valet switch is simply a valve that stops the manifold pressure from reaching the AFC. Without boost from the intake manifold, the AFC will not allow the governor lever to follow the fuel plate profile or reach full fueling without a fuel plate.

It will not add HP, it will only restrict it. It lets guys with heavily fueled truck drive without puffing large clouds of smoke or it allows you to let someone else drive your truck without having to worry about it.

 

The last post hit it on the head. The purpose is to keep the 12 year old parking attendents at the country club from nailing the throttle and doing burnouts with your truck. Hence the name "Valet Switch."

When the air pressure is shut down from the manifold to the AFC the truck wil not get above a fast idle, but may still get to 35 MPH in a pinch, and that is good enough for parking.

If you do not use valet parking, do not waste your time with installing the air shutoff valve.

 

Is it possible to use a valet switch on the highway? Specifically, if you had a 500 hp truck and wanted to limit hp to run icy highways in the winter, would it work??

 

On the heavily fueled pickups it is used more often than not. Jim Fulmer kindly took the time to show me his setup and explain how it worked for him.

 

a truck making around 600hp normally will make around 200hp with the valet switch.

Tom

 

Man I wish it was that much difference, mine is 500 ish in valet, you can limit it more my sliding the AFC back but that is no fun, I set valet for power/driveablity/and EGT's.

Jim

 

wow, Rebel's (i believe) dyno chart shows like 572hp normal and 180something hp with the valet on. it's in the TDR members photos.

i dunno ???

Tom

 

[quote author=Dr. Evil link=board=16;threadid=21062;start=0#msg197884 date=1066359489]
Is it possible to use a valet switch on the highway? Specifically, if you had a 500 hp truck and wanted to limit hp to run icy highways in the winter, would it work??
[/quote]

Jim,I would like your opinion if you dont mind.....thanks.

 

I am seeing 420rwhp in valet mode and 630rwhp with it off. mine is in valet mode unless I am sled pulling or want to spank a ricer ;D

BBD

 

Thanks....just the info I was looking for. I'm looking to get rid of my 24V and get a 12'er. By the way, INCREDIBLE truck !! Has got to be one of the nicest Ive seen on the net....