Bosch 2.8 VE Pump

[alanwh]

Hi Guys,

Have been reading posts and decided to rip out the ecu on my van as it was gosting me loads of money in pump rebuilds.

This is a Bosch 4 cylinder 2.8 11mm turbo pump I have just bought to convert my van from fly by wire.

If there's any interest I could locate some supplies for you guys over in the UK

http://i263.photobucket.com/albums/ii133/alanwh2003/28VE.jpg

[alanwh]

Oops sorry the link should be

http://i263.photobucket.com/albums/ii133/alanwh2003/28VE.jpg

[subsonic]

I am guessing you will have interest very quickly.

[DA-BRT]

There are a couple of problems with this pump.

The big solenoid in the back creates interferance with the injectors, the pulley has to be machined. And the nose piece is short. The govenor is not caged.

Can better take one from a LT 2.8 TDI. Got a lot less problems there.

[alanwh]

Thanks Brt

4 pot 2.8 Lt are rarer than Hens teeth here in the UK.

Not sure what you mean about "interference with injectors" or "Govenor is not caged" and why this would cause problems.

I bought this pump from a local dismantler for £150

I have used the top from this pump with a manual bosch body from the Ford York Engine. I had the manual one on for a time with the fuelling turned up, but didn't like the excess smoke on and off boost. i have had to advance the pump by 5 deg. and now it goes like sh*t off a shovel with very little smoke and excellent on cold start

If these are no good then C'est la vie, just trying to help out.

Thanks


Alan

[DA-BRT]

I didn't said it was not good, but you need to optimalise a couple of things.

The big actuator in te back of the pump is the electric choke. We haven't got room in on our engines between the pump and the cylinderhead/injectors for the big actuator. You have to fix the leaver and remove te actuator.

This issue is for sure on our DI engines. I don't know if we got more clearance on the IDI.

The govenor in this pump isn't caged as on the 1600/1900 (T)D . But with a normal spring. If you replace the spring by a stronger one than the rpm limit goes up as well. I added an extra spring inside the other spring.

I know that they are rare. Got a couple of very young ones on stock. When I find oneI always buy it.

I'm now having a chinese company replicate a special prepared IDI and one DI pump. After testing them I want to sell them. But it takes time to finish it up.

[RabbitGTDguy]

Alan,

Depending on the internals of your pump specifically, it could be converted to work on a mTDI relatively easily.  The conversion would be very similar to the conversion of a 4bt pump I believe. Pictures would tell more and pump numbers.

You would have to consider...
-What is the max RPM of this pump stock?

From there...
-Consider and modify max timing advance
-control lever assembly travel
-accomodations for the vw style gov cage assembly

If the nose of the pump is similar to the 4bt pump, you can always do one of two things to get it to line up.

1. Easiest I think... have a IDI VW injection pump sprocket machined to accmodate the nose of your pump. I have one here modified to fit and align my next 4bt pump's nose up on the 1z/AHU engine I'm building for my b3

2. If you want adjustability of the pump on the "fly". You can install a ALH style injection pump sprocket "hub" (if its a large 20mm mainshaft pump) and also the ALH style adjustable sprocket. You have to turn it backwards on my application (4bt pump on built 1z/AHU motor in MK1). To clear the IP braket you need to have the "bump" on the ALH style sprocket machined down to the flat hub. It works great on my setup...but is a bit more costly machining wise. IMHO.

So, there are a variety of options. I personally have heard many horror stories about chinese product, etc. so I'd be awfully fearful to turn that way. The options in building your pump lie within the numbers on the pump itself...and there are those on here that are capable and willing to do the work for you.  There are very few pumps on the market that will just "bolt on" and run the mTDI to its max potential...especially in stock form and the LT pump is one of them (which DA-BRT mentioned) and there is a nice discussion on that here as you can see.  There are options.

Joe

[Tintin]

alan, give me your pump number, Im curious about it.

0 460 414

[alanwh]

Doh, it's 12mm !!


460-424-124  

Sorry Guys it was my old pump that was a NA 11mm

460-414-145 686-2