Greg, I'm sure your "analysis of the physics involved" in the IP timing procedure is more accurate than that of Dr Booth's, but here is a copy of page one of his five page post on IP timing. Anyone with a spare IP can easily try this on the work bench. But of course if you believe nothing outside the FSM is valid...


Date: Wed, 03 Jul2002 12:36:38 -0400
From: Marshall Booth
Subject: Re: [DIESEL] IP Timing
Mike, Here are several ways to time the pump (its almost NEVER out of
time except by about 1/2 the amount of chain stretch you have and that
usually isn't any problem until the chain needs to be replaced). The
bubble method is the easiest!
I'll include all 3 WAYS that I know of to do it.
> Bubble method!
>>
On the subject of diesel timing. If you are replacing the pump or
> rebuil~in~ t~e engine. The si~plest ~nd.m.ost accurate. way of setting the
> pump IS. \R.!?connect the fuel line gOlng).Q!Qt.he.EumQfrC?mthe filter. ,
> Take the spring and plunger out of #1 delivery valve, put the delivery
> valve back in and snug it down, hold the the pump linkCjlgein the full
> open position. If you have the drip tube install it on the delivery
> valve, if not use the injector line in such a way that it is pointing
> away from the engine. It you don't mind the taste of diesel you can blow
> through the fuel line or use low air pressure. Put the open end of the
> injector line in a glass of water and watch the bubbles. Turn the engine
> slowly until the bubbles stop and check the timing mark. After
> tightening the pump recheck. This method is really more precise than it
> needs to be and although it may sound complicated it is very easy.

>
>

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