[DML] Tuning Idle Speed Circuit. (was: Re: idle problem)

["Harold McElraft" <hmcelraft@xxxx>]

I just read carefully the note you attached. The delay valve is in 
fact in a reversed condition than that called for in the D when used 
in a spark delay setup because the spark advance needs slowed down 
some to eliminate "ping". The "Carb" side in that case is attached 
to venturi vacuum which increases with throttle. The D setup is 
attached to manifold vacuum that decreases with throttle. The delay 
effect in the D is a bleed-down where the spark setup calls for a 
delay in applied vacuum.

Harold McElraft - 3354



-- In dmcnews@xxxxxxxxxxxxxxx, "Adam 16683" <acprice1@xxxx> wrote:
> I am getting opposite opinions on which direction the delay valve 
is 
> supposed to face. Harold, are you sure that the "dist" side goes 
> toward the vacuum supply/tee fitting? 
> Adam Price 16683
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "Harold McElraft" <hmcelraft@xxxx> 
> wrote:
> > Is the delay valve installed in the correct direction? It is the 
> > plastic vacuum valve located at the control pressure regulator. 
> > The "Dist" side goes on the vacuum supply side.
> > 
> > Harold McElraft - 3354
> > 
> > Just removed one of these from a Lincoln. Was going to throw 
away. 
> If anyone going to SEDOC wants, let me know and I'll bring with.
> 
> My CPR is totally different, but appears from vacuum diagram in 
Tech
> Manual that "carb" nipple points towards Tee and "dist" nipple 
goes to
> CPR.
> 
> Ford uses these things in horrifically complicated spark advance
> setup. When they switched to 4350 carburetor, moved spark advance 
to a
> full time vacuum port. Then had to route through delay valves and
> ported vacuum switches just to make engine run. Stupid.
> 
> Bill Robertson
> #5939