11mm pump head
 

Anyone know a part number or application that the 11mm head that will fit our injection pumps comes from?

Jason

I'm wondering if the first generation Cummins 6BT is a source for an 11MM pump head? The 6BT had a Bosch VE up till ~1993 when an inline "P7100" replaced the VE.

If we can find a 6BT VE pump identification number it'll tell what size head it has. I know the 4-cylinder version (4BT) has a > 10MM pump head - when equipped with the VE pump - some of the VW guys are using the 4BT pump on a TDi engine to make a "mTDi".

"Bosch produced VE pump in two shaft sizes...17mm and larger 20mm mainshaft pumps. The shaft sizes differ mainly in relation to the size of the pump head, 17mm shaft for up to 9mm head and 20mm shaft for 10mm head and over."

[...]

"The Bosch part number on the Bosch VEs pumps are fairly standard i.e. 0-460-4XX-XXX VE , what are important to note are the 6th and 7th digits of the Bosch Number. The 6th digit indicates the plunger size, 9 for 9mm, 0-10mm, 1-11mm, 2 for12mm. The 7th digit the is the application, 4 for 4cyl., 6 for 6cyl., etc. The specific manufacturers part number may also be on the pump and completly different, for example, the Cummins 4BT injection pump numbers do not indicate plunger size, everyone I have seen to date has been 12mm. Since the 4BT is a 4 Cylinder engine we can assume that part."

Perhaps a 6BT - like the 4BT - has a 12MM pump head? Edit: I know you're asking for a 11MM head, but hey, why not shoot for the moon. :) Also, maybe some Cummins had 11MM pump heads?

Source: http://www.vwdiesel.net/forum/index.php?topic=6427.0

im very familiar with the 1st gen Cummins engine i have had a few of them. they are a 12 mm head. im not sure if you could cut the fuel down enough for the engine vo idle! the 12 mm head pushes enough fuel to feed a 5.9... from what i hear the 11mm head is the one of choice over in europe where they are actually building these up for some real power. i have also been in contact with giles about a hot rod pump and will get his input on the 12mm head.

Actually we use 12mm head. Some guys might use 11mm,
but top guys seems to use 12mm always. So it is possible to get working.

11mmm thingie was used in the Penta version of the D24T.

Ahhh, the 12mm head is used. They are easy to come by around here. Lots of cheap cummins VE parts as most guys think they are useless and go to a P-pump. (we know better)

Jason

What was the Penta version of the D24T? Application?

Jason

Any info over there on the European forums that I cant read about what they do to the pump to make the 12mm work? I know it will bolt in and fit, but I'm talking adjustments, what delivery valves if they are changed?

Jason

You need to keep normal feed really minimum, so at idle-speed
will keep somewhere between 1000-1500rpm. Trick is to mod that
plug on richer-circuit (that thing in top of the td pump, cant remember if it
was called "ICD" or something like that) so radical at when pressure kicks in
the real feeding begins. And the governor plate on that richer mod (the plate which you can roll up and down, and have an effect when the plug starts to pull down due to pressure) needs to be rolled as down as it goes.
Then they speak something about turning the gas-axle.

Thats all i found. Sad i cant help more at this moment.

Your talking about the AFC housing, or on the vw forums the German abbreviation is LDA for whatever that stands for in German. I have that modified on my car already, to provide as much enrichment as possible under boost. I was just supprised to find out that you could reduce the fuel down enough to get it to idle. I'm going to start looking for a 12mm head or parts pump to steel one out of!

Jason