Sources for Bosch P-pumps?

[chairchild]

I've got myself a little Rover 220SD derv, which comes with a lovely Bosch VE pump (including dynamic ECU timing advance!)




got a lot of work to do to this - mainly slap on an intercooler, and fit up my GT1849v VNT turbo. After fitting some Freelander 300Tdi Nozzles to my injectors, I should be good for about 170Bhp from the standard pump (and be at the limit of that turbo)


But... after all that works, I intend to fit a GT20/GT22 based turbo, and the VE pump will run out of puff at this level. It's just going to be the point of diminishing returns - any further upgrade parts will be ridiculously expensive, and will make the poor little VE likely to explode at any point.


So... I'm intending to fit a Bosch P-pump


I know the main part numbers are P7100 (very few 4 cyl version were made) and the P5000 (the weaker version of the p7100, but more common as 4cyl)

Has anyone got a few suggestions as to where to look for these lovely beasties? Annoyingly, all mercs with the p-pump, are 5 cyl! and most seem to go for about £200 on fleabay, regardless of condition.




Failing that - has anyone got any other ideas for what can flow enough fuel for 250Bhp comfortably, without spending a ridiculous amount of money?


A few pics of P-pumps, for anyone who cares for a nice bit of mechanical design

[chairchild]

A bit of digging around finds out the Merc Vito 308D, Has a version of the P-pump!

www.ebay.co.uk/itm/Mercedes-2-3-308D-van-Bosch-Injector-pump-diesel-fuel-injection-GWO-/270838748339?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f0f3f54b3#ht_6099wt_946





But being a commercial engine.... there's not a great deal of information out there on them

[jrevillug]

If the Merc 5-pot is just a 4-pot with another pot on the end you could use a 5-pot one with the injector pipe running into the return - but I don't know if the 5-pot has a flat-plane crank (what you need) or whether the firing is even.

[cobblers]

Feb 23, 2012 17:34:19 GMT jrevillug said:

If the Merc 5-pot is just a 4-pot with another pot on the end you could use a 5-pot one with the injector pipe running into the return - but I don't know if the 5-pot has a flat-plane crank (what you need) or whether the firing is even.

don't think that would work - 5 cylinder cranks look like this:



So only one of the injectors would inject at the right time - the rest would be all over the place.

[jrevillug]

Feb 23, 2012 17:48:02 GMT cobblers said:

don't think that would work - 5 cylinder cranks look like this:



So only one of the injectors would inject at the right time - the rest would be all over the place.

Ah, I did wonder. No, you're right - that wouldnt work very well at all.

[chairchild]

Don't worry - you're not the first to have thought of that ;D

Been summing up what's realistically possible - as I have no intention of going over 220Bhp (hell, 200Bhp's never been pushed on the Rover L-series!) there's not much point spending hundreds modifying a P-pump, only to then have to spend even more money converting the P-pump to fit the Rover, then new pipes, to end up with a pump that still won't have timing advance....

Buuut....

An isuzu 2.8Td, looks to be an ideal candidate for parts to upgrade my pump, to cope with a good 220Bhp. Which would be nice

[xbo11ox]

How are you gonna control the vanes on the VNT?

[chairchild]

I've got a total of three different options!



1st option: Buy a £16 Arduino, and follow the instructions from this website:
dmn.kuulalaakeri.org/vnt-lda/



2nd Option: A bloke I know on MG-Rover.org is making his own standalone controller (still very much in the testing phase)
forums.mg-rover.org/showthread.php?t=390786&page=24



Or, 3rd option - make my own mechanical control. Vaguely based on this linkage setup:






But... seeing as I Have access to the waterjet cutter at uni, might as well make use of it Going to be operated by bowden cables too, rather than solidly mounted