300 HP marine pump

[4.3dieseljeep]

Does anyone know the pump # for the 300HP marine 6.5 DB2? I Have also seen that there is a DB4 6.5 pump. Any info on that?

[More Power]

I don't have the Stanadyne # for the marine calibrations. The marine calibrations I'm familiar with were at one time (and may still be) proprietary to Peninsular Diesel, at least for the calibrations they use/sell. We used one of their 300-hp spec pumps and set of marine injectors in our 6.5 Project (http://www.thedieselpage.com/finale.htm).

According to Pen, a DB2 (2-roller pump) can be obtained for various power ratings up to 340-hp. The DB4 (4-roller pump) is available with 6.5 calibrations up to 400-hp.

The Diesel Depot (http://www.thedieselpage.com/vendors/avant.htm) offers reman'ed marine calibrated DB2 pumps. I don't know if these are the same calibrations as what Pen uses.

MP

[MikeC]

MP

Where would go to get a DB4 with 300HP calibration?

Mike

[Kennedy]

The DB 2 2 plunger pump is a 250 HP pump out of the box that can be turned to 300HP just like the 4911 can go from 200 to 250-ish.

Unless you are going for max power, I'd suggest the 250HP marine DB2 which is generally readily available in NEW condition.

[grape]

4974 is the 250 hp marine db2

[JeepSJ]

To heck with all this talk about pumps...what 4.3l diesel do you have in your Jeep and Blazer?

[4.3dieseljeep]

Olds V6 diesel. Simular to the 5.7 with some major changes.

[More Power]

Way back in 1997, we published an article about Peninsular Diesel. In it, I discussed their marine pumps, and showed a couple of power/torque graphs for their 250-300 hp marine 6.5's. In these, the torque peak came at about 2600-2700 rpm, due to a unique timing/fueling curve in their marine pumps in combination with their non-wastegated marine turbochargers.

When using a wastegated GM factory turbo, the torque peak occurs nearer the boost pressure peak.

MP