6BT 5.9L 180HP Fuel Pump upgrade

This topic has 2 replies, 2 voices, and was last updated 7 years ago by Velma7.

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January 3, 2017 at 6:41 pm #14185

Velma7
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Engines: Cummins 6BT 5.9L
Location: Mass
Country: USA

Hi All, I am looking for advice on upgrading the fuel pump and injectors on my 1995 6BT 5.9L 180hp, the engine is currently being disassembled and rebuilt. During this process I am looking to add a few more horsepower and better performance with a larger fuel pump and upgraded injectors. I prefer to limit the modifications of the coolers and stay within the limits of the current engine. (serial number 45257807)

Appreciate any suggestions.

Thanks,

Peter
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February 1, 2017 at 7:29 am #14954

Velma7
Participant
Engines: Cummins 6BT 5.9L
Location: Mass
Country: USA

Tony, thanks again for the good advice and information. One clarifying question, Cummins (CPL0742) has a factory injector opening setting at 3650 psi, Currently my injectors are set at opening 4200 psi, any concern with the higher opening pressure? From my original question I was looking for extra output of the injection pump and injectors for engine performance. My Lucas/Cav pump has now been completely overhauled and rebuilt it is now been tested and set to the higher fuel setting.

Again, thanks for your info.

Peter

January 5, 2017 at 7:20 am #14213

Tony Athens
Moderator
Vessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA

Peter,

Any good pump shop can recalibrate/rebuild you CAV injection pump to 210BHP at 2600 RPM, FR90199.. Your engine is a CPL0742 and was factory set for 180BHP at 2500.. The injectors are the same for both ratings–just a proper setting on the injection pump..
Be sure they set the high idle to the upper range. Prop the engine to reach an honest 2700 RPM and you get the moat is as to give….Be sure your seawater system up to spec, the front pulley /serpentine drive pare are 100%, and if you want to “cruise at 2400-2500 RPM and take all it has to offer, run a 160F hi-flow stat, and use a 190-195 F coolant alarm for give you some breathing time should something happen on the cooling side..

Do it all right and you can run this engine quite hard in relation to is maximum capabilities..

I do not have the older CPL0742 curves in digital format, but the CPL2891 is basically the same. The injection shop can sort that out as to any tweeks needed so you will stay with the original CPL..
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