Bosch P7100 Injection Pump
The Bosch P7100 was used on 94-98 Cummins B5.9L and C8.3L engines used in Dodge, RV and commercial truck applications.
The P7100 injection pump is available through us in a variety of performance configurations.
From stock rebuilds, mild performance, to full race and tractor pull custom pumps.
All pumps are built in house and are calibrated on a 20 HP Hartridge AVM2-PC injection pump calibration machine. The Hartridge stand that is used has no problems calibrating a 13mm P7100 putting out 800+ccs of fuel at any rpm. Having a machine powerful enough to turn a high out put pump at any rpm is crucial in the calibration process, in order to know exactly what the pump is putting out at any particular rpm.
All 13mm P7100 injection pumps will also need the correct flowing injectors and fuel supply pump. A 13mm P7100 will be destroyed if you run 370 marine injectors and stock fuel supply pump. We can make you a correctly sized set of injectors for your application and help with the fuel supply set up. Custom injection lines are also available.
We also offer all parts and advice necessary in helping you turn up a stock pump and getting the most out of what you have.
You may hear and read about a pump putting out 600 or 800cc’s of fuel. What this means normally is the volume of fuel a pump puts out in cubic centimeters (cc’s) of fuel per 1000 strokes. 1cc of fuel is equal to about 2 hp. So if you have a pump putting out 800cc’s of fuel and had the air necessary to burn it all, you would have 1600 hp worth of fuel. Also a P7100 injection pumps rated output will vary from the tested output on the test stand vs. on the truck depending on the pumps configuration such as injector size, delivery valves, fuel line size etc. Test injectors flow less then the custom matched injectors that you will be running on the truck. So test spec output will be on the conservative side.
Stock/Performance P7100’s are offered in a variety of performance configurations.
All pumps are built to your performance needs. No two pumps are exactly alike and come with a number of fueling, timing configurations, and rpm settings. We normally recommend 4000 rpm governor springs which will give your truck a lot better top end, especially if your truck is running 4:11 rear end ratio. Remember that a stock P7100 governor will come in and cut fuel at 2500rpm under load. No load max rpm is normally 3000 rpm. No load max rpm is the rpm you would see if your transmission is in park/neutral and depressed the throttle to the floor. Loaded rpm is the max rpm you would see under a load (vehicle in gear) with the throttle to the floor. The difference in rpm is known as droop. Stock P7100 injection pumps on Dodge applications have a 500 rpm speed droop. With 4000 rpm spring the stock rpm will be brought much higher giving your truck better top end.
Note; In order to run 4k governor springs, a set of 60 psi HD valve springs should be installed to avoid the risk of valve float. Springs are available from us or any Cummins parts dealer.
High output P7100’s come in a wide range of calibrations depending on your performance needs. Unlike most shops that sell one flavor, one size fits all HO pumps, we sit down and talk with you to customize a pump that is for your truck and meets your performance needs.
High output P7100’s are available in 12mm and 13mm plunger barrel sizes.
Injection timing is normally set at 24 degrees or we can set it as requested.
Governed rpm can be set between 4000 to 6000 rpm as requested or we can help recommend a governor setting.
All HO pumps are set up to run dual fuel feed lines.
All HO P7100’s require a high out put supply pump to keep up with demand. And No! A stock supply pump is not going to work! It can’t even keep up with a turned up stock P7100. Don’t believe me? Hook up a fuel pressure gauge and make a run down the drag strip or make a run on the dyno at wide open throttle. You will be lucky to see 15 psi. This is too low and hard on your injection pump. When you raise your engine rpm what do you want to see happen to your oil pressure? The last thing you want to see is the pressures go down. But this is what happens to the poor injection pump running the stock supply pump. Remember fuel has to do more then make power; it has to do a lot of the same things for an injection pump as oil does for an engine.
It amazes me to see people running highly modified or 13mm P7100’s and are still running the stock supply pump and then wonder why they jam the rack. I guess they think that only VP-44’s need an after market supply pump. A P7100 needs a lot of fuel to keep it alive and happy. You will need a supply pump that has enough volume that under load, the pressure never drops below 50 psi. You also want to run a good fuel pressure gauge to keep an eye out for any fuel supply problems. You wouldn’t run your engine with out an oil pressure or temp gauge would you?
If you purchase fuel from a fuel station, remember to run additive in every tank. Diesel is now ultra low sulfur and has very little lubricity in it. It has been on the market now for over a few years, and we are seeing the results of the fuels poor lubricity in pumps we get in.