[Vwdiesel] .85mm or 1.15mm IDI injection pump timing? The facts...
mark at shepher.fsnet.co.uk
Thu Jul 7 02:32:11 PDT 2011
Loren's correct about the timing figures. The 107A pump was only officially
put on vehicles around 1980. Apart from this pump, [and in truth including]
all unremanufactured pumps should be set to 1mm as a start, and then because
of general wear, internal spring weakening, affecting both internal
pressures and dynamic advance rate, and fuel changes. Overall engine
condition also affects, as well as injector condition, and especially
injector break pressures.
The only way to get it right on the side of the road, is to run it and then
tweek the pump into advance or retire from this starting point.
Improements can be found by ear, touch [vibration checks through gear stick
when accelerating], periodic fuel economy changes etc on on otherwise
Use the dial gauge to make notes of where you are and how to get back there
when you find the motherelode was the last position.
Timing is not tuning
----- Original Message -----
From: <LBaird119 at aol.com>
To: <vwdiesel at vwfans.com>
Sent: Thursday, July 07, 2011 5:43 AM
Subject: Re: [Vwdiesel] .85mm or 1.15mm IDI injection pump timing?
> In a message dated 7/6/2011 3:53:30 P.M. Pacific Daylight Time,
> newdarkages at yahoo.com writes:
> attempted to search the archives but i couldn't find anything specific :(
> i remember there were 2 common settings for setting the timing in the
> Bosch VE
> injection pump which was fitted in the IDI diesel VWs. the stroke
> i remeber having timed were .85mm and 1.15mm.
> when you have an engine out of a different car or you are changing the IP
> how do you find out which timing stroke is the appropriate one to use?
> is there a chart or a range of part numbers?
> also which timing did the Turbo IPs with the altitude compensating
> addition use?
> tank you for clarification!
> If the VW part number on the pump ends in "107-A" then it's a "Yellow
> and times at 1.15mm. Others time at .85, .95 and 1.00mm. Post those
> of your part number and we'll dig up your correct timing. The first part
> of the number
> is 086-130-_ _ _ - _ I think.
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> Vwdiesel at vwfans.com
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