pump change

[HetLaeN]

Heard about one that used the M-pump from a 300d on a bmw 2,4 that uses the same VE pump just like the D24 and I wondered if the M-pump could be used on the D24?

[cuaz64]

Somwhere here in the forum, is a thread about part numbers for "chinabay" directo fit pumps.

[Jason]

The part numbers I posted were for pump heads and internal parts, not for a whole pump. Besides that, the work needed to build one of those pumps to push more fuel is expensive. Its not as easy as a turn of the screw like the VE pump.

Jason

[HetLaeN]

Originally Posted by ForcedInduction

The 300D has 5-cylinders.

300D also got a 3 liter 6 cylinder. You think about the OM617 engine, but i think of the OM603

[HetLaeN]

Originally Posted by ForcedInduction

Actually it is. 7.0mm and 7.5mm elements cost $55-75/ea and there are screws to easily adjust min/max speeds, max fuel and the defueling curve. The turbo engines can get an extra 20% (120-145hp) with just a few screw turns and the non-turbos have about 65% overhead (88-145hp) on the stock elements.

http://www.superturbodiesel.com/std/...mps-t-189.html

The only significant advantage of a VE pump is an internal timing advance, the M and MW require an external timer as part of the chain/belt sprocket.

would a m-pump modified from Myna give more diesel than a VE pump modified with 12mm piston?

[Jason]

Originally Posted by ForcedInduction

Actually it is. 7.0mm and 7.5mm elements cost $55-75/ea and there are screws to easily adjust min/max speeds, max fuel and the defueling curve. The turbo engines can get an extra 20% (120-145hp) with just a few screw turns and the non-turbos have about 65% overhead (88-145hp) on the stock elements.

At the least, $330 is not cheap, and I wouldn't call a 20% increase in fueling significant. Changing plungers and barrels is not turning a screw.



Jason

[v8volvo]

Originally Posted by ForcedInduction

The only significant advantage of a VE pump is an internal timing advance, the M and MW require an external timer as part of the chain/belt sprocket.

Well, that plus the fact that they are much smaller and lighter, and don't have any of the funny interfaces that the Mercedes fuel systems have. A VE pump only has fuel and one small electrical wire going to it (or technically two on the '85-'86 and a few rare '84 pumps in West Coast cars). A Mercedes pump means fuel, motor oil, and the vacuum system all have to interact in one component and the results of that can be messy. When those vacuum shutoff actuators fail, which they do all the time, they can spread black diesel engine oil all throughout the car's vacuum system... in the doors, in the dash, etc. I have worked on W123 diesels that have big black stains in the carpeting in the driver's footwell from where oil got into the ignition switch, damaged it, and ran out all over the inside of the dash and down into the footwell. You won't see that issue on a VE pump motor...

[Jason]

Originally Posted by v8volvo

When those vacuum shutoff actuators fail, which they do all the time, they can spread black diesel engine oil all throughout the car's vacuum system... in the doors, in the dash, etc. I have worked on W123 diesels that have big black stains in the carpeting in the driver's footwell from where oil got into the ignition switch, damaged it, and ran out all over the inside of the dash and down into the footwell.

Now THAT would suck.


Jason

[HetLaeN]

would a m-pump modified from Myna give more diesel than a VE pump modified with 12mm piston?

[Jason]

Hard to say, depends on how much fuel it can flow. A 12mm head VE pump can support 300hp though.

Jason