[Diy_efi] Re: Tunning TDi engines, advice sought

[Stephan Helbig]

Hi,

Seems you all have the Bosch VP 44 rotary pump. However, it actually
doesn't matter which pump it basically is (many other diesel come with
VP 36/37). The only question here again is: How to find maps. There
should basically be five incoming signals to find in the maps (or
registers in the disassembly) for the basic functions:
- pump position sensor (only with VP 44 afaik)
- TDC sensor=engine speed sensor
- throttle position sensor
- boost pressure sensor
- EGR valve sensor (which should be switched off!)
- some pumps even have fuel temp sensor, another throttle position
sensor, injector solenoid sensor on the pump and a needle sensor at one
injector and one should take into account coolant temperature, which is
connected to advance ignition.
All in all: not a quick job and I'm also still looking for to find
single maps on my BMW 525tds files (yes, there are two eproms and so I
have *two* files at 90kb).
As for the BMW files it is remarkable that there are a lot of zero flags
(FF) in the middle of the file and the actually programming only seems
to be at the beginning and at the end. The disassembly shows you besides
hexadresses registers like "J8132". Anyone any ideas about that?

Stephan

Lachlan Chapman schrieb:
> 
> I was about to ask a similar question to the list, the engine i have in mind
> is a nissan with a bosch VP pump, it apparently uses canbus for the link to
> the ecu, but the manuals at the dealership didnt go into any more depth.
> 
> ----- Original Message -----
> From: "Shirley, Mark R" <MarkRShirley at eaton.com>
> To: <diy_efi at diy-efi.org>
> Sent: Tuesday, June 18, 2002 2:15 AM
> Subject: RE: [Diy_efi] OT: Tunning TDi engines, advice sought
> 
> > Is the pump an electronic one, or a mechanical one?
> > If it's electronic, you need to find out who makes your controller.
> > Then we can tell if there's anything you can do.
> >
> > -----Original Message-----
> > From: TVS [mailto:toby at kmvs.freeserve.co.uk]
> > Sent: Friday, June 14, 2002 6:53 PM
> > To: DIY EFI
> > Subject: [Diy_efi] OT: Tunning TDi engines, advice sought
> >
> >
> > I appreciate this is off topic but I believe a few people hear have
> > excellent experience with tuning turbo charged diesels? My cousin is
> racing
> > a Landrover in local events with a standard Rover 3.5 V-8 but I believe
> > there are a number of tuned 300Tdi which are very competitive. The problem
> > is I can't find any good information about tuning turbo diesels other than
> > companies selling there survives with stage 1 thought to 4 etc.
> >
> > The engine is a 4 cylinder, 2.5liter with a 90.5mm bore 97mm stroke. It
> > produces 110hp @ 4,000RPM and 195b ft @ 1,800RPM. Valve are 39/36.5mm
> > inlet/exhaust The turbo is a Allied signal unit with max boost of 0.83 to
> > 1.04 The intercooler is small and robustly made with a very thick casting.
> >
> > We are looking for approximately 150+ Hp and as much torque as possible.
> The
> > area I'm least familiar with is the diesel injector pump, the fuelling
> curve
> > and timing. But I would be very grateful for any information regarding
> this
> > sort of project all together. Thanks, Toby
> >
> >
> >
> >
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> 
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