In theory... Injection pump replacement - PeachParts Mercedes-Benz Forum

CoyoteStarfish · #1 07-27-2008, 11:28 AM

In theory, could a P7100 pump from a six cylinder cummins be fitted to either of the six cylinder engines?

The firing order might not be the same, but with some creative line routing it might be solved. So long as the orbit of the cam lobes coincide with the combustion cycles on the engine.

Are there physical constraints? Is the P pump too large?

All the fuel we would ever need with that bad boy.

#2 07-27-2008, 12:52 PM

You can do anything as crazy as you can imagine if you put enough money into it.

CoyoteStarfish · #3 07-27-2008, 04:10 PM

Well thats a good answer to start, but realistically.

An adapter flange, shaft extention/cog mount - that part is relatively simple.

Would the orbit timing of the cam lobes be on time however?

Not surprisingly, they share firing orders.

OM603 1-5-3-6-2-4
Cummins B5.9 1-5-3-6-2-4

This could turn into a bolt-on OM603/606 powerup, maybe a little excitement is in order?

#4 07-27-2008, 04:20 PM

Humm, if a 7mm M-pump is good for at least 500hp, how much can the engine make with a 14mm P7100?

Here is a good article: http://www.dieselpowermag.com/tech/dodge/0807dp_bosch_p_pump_diesel_fuel_injection/index.html

CoyoteStarfish · #5 07-27-2008, 10:19 PM

Haha. A lot?

I forgot how big that mofo is.

I'm also thinking about something I saw the Finns do once..

They had a 6.2L GM diesel, and built a bracket on the front of the engine to hold twin injection pumps (Stanadyne DB2's) and each outlet on the pump was T'd together, then sent to the appropriate cylinder.

It was great, they demonstrated that simply by disconnecting the fuel solenoid on one pump you cut the fuel usage in half. I would hate to bleed that system, however.

I think it was also twin turboed. Crazy Finns.

There just has to be a different(read: cheaper) way to make the same or more power as the Finns.

-EDIT-

I was off my mark, just found the video again.
It's from the Netherlands. 6.5L. Single turbo.

6.5 twin fuelpump diesel tractor

Cervan · #6 08-02-2008, 07:17 AM

That sounds very plausible.. the cummins inline six injector would be perfect.

Now what we could do is remove the vaccume pump and add an extention onto the end of the timing gear, and then add a gear outside of the crankcase. Then run an extra pump by chain drive right next to where the normal pump is. So realistically you could have two pumps, one optimized for fuel economy, and a high performance pump that kicks in when you want it to.

CoyoteStarfish · #7 08-02-2008, 09:23 AM

I ha ve a very basic question about this idea.

Fuel = Power?

What I mean by this is...

The stock P7x pump went on an engine rated at 135HP / 300ft.lbs.
The volume of the engine was nearly six liters.

The 603 is rated for..dare I say, 141 hp?

Doesn't this constitute a "downgrade" until pump mechanics are upgraded for higher output?

But Oh-Ho. Whats this? Only rated for ~200ft.lbs. of torque.

What is different here? Would this pump create more power on this engine with no modifications?

And at what point do the stock injectors become too small? Drill and tap the head for larger injectors?

CoyoteStarfish · #8 08-03-2008, 07:09 PM

*bump* FI must be on vacation.

Diesel911 · #9 08-03-2008, 07:59 PM

If you want to buy the IP here is one on Ebay.

http://cgi.ebay.com/ebaymotors/Dodge-Cummins-12-valve-P7100-Diesel-Fuel-Injection-Pump_W0QQitemZ350083982033QQcmdZViewItem?IMSfp=TL0807291210r34109

What advances the timing on this IP.

GREASY_BEAST · #10 08-31-2008, 02:22 PM

4bt pump has apparently been used for M-TDI projects.... Don't see why the 5.9 pump couldnt be used for a superturbo project, but don't expect anything like that to be reliable, cheap, or easy.