[Vwdiesel] Brakes --- engine brakes -- ( The physics of it ).

[Sandy Cameron]

At 05:47 PM 1/6/04 -0800, you wrote:
>
>I initially thought you could rig up a switch to shut off the fuel cut-off
solenoid on the pump, but I guess that wouldn't be a good idea since I
assume the pump is lubricated/cooled by the fuel and it would run dry pretty
fast with the input feed cut
>off.
>
>-- 
>    Roger


Wrong

The shutoff solenoid  prevents fuel from entering the high pressure
injection pump chamber so the injection plunger has no source of fuel to
inject . The fuel transfer pump soldiers on,  pumping about twice the fuel
required at full throttle, This circulation continues at a rate relevant to
speed of rotation as long as the pump turns, and as Hagar observes, the same
transfer pump provides the pressure to actuate the injection timing advance
device. [the special outlet banjo bolt with the tiny hole restricts the
return flow to the tank to provide this pressure. wrong bolt, no pressure,
no timing advance at speed.]

The solenoid acts like a vasectomy. The pump still works, but nothing is
injected!

Rig a cut off switch and give it a try. If hidden properly, it makes a
theft-proofing device. (in case a robber tries to get away from a 7/11 in
your diesel ):^))

Sandy