Thread: Stock Fuel Setting.

Originally Posted by Blknight.aus

thats a very curly question as that pump can have a lot of different internals fitted to it to make it do different jobs...

its theoretically if pushed to the absolute limit by parts swapping between the varients to get a setup that will pump as much fuel as possable. We discussed this a lot in the dieso room at ALTC and I think from memory we came up with a max fuel of nearly 450ml per pot per 1000 deliveries. I have no idea how to squeeze that much air into the chambers to effectively burn that much fuel very very rough guestimations worked it out at each pot would need nearly 20l of air inside it prior to the upstroke on compression, Thats a very very big and very very angry turbocharger or supercharger.

on a stock pump its nearer the 250ml/1000 mark but in reality you almost never go past half maybe 3/4 of that even on a worked up turbod version. the stock version has the absolute max set as something like 125ml and the governor limits it to about 95-100ml to the 1000.

you can check you pump deliveries without pulling it down and Ive been known to do it with a specially distorted injector pipe on each pot as part of a major service if low power is complained about even tho every other possable source has been investigated.

ive also been known to install injectors upside down to do a spray pattern test.

Have a dig through this thread.
http://www.4btswaps.com/forum/showthread.php't=1035

The figure John found was 120cc per thousand strokes. That's what I took and with the 250g/kwh BSFC came up with 550Nm of torque.
If we can get 550Nm at 2600rpm then there's our 150kw.
Iveco make a 3.9L diesel with 550Nm of torque, it runs 1.6 bar boost with a max intake temp of 50 deg C.
I figure without common rail we'll need close to 30psi to burn clean.