Why a six. 7 Cummins P Pump Swap Can make So Much Feeling
In the event that you're thinking about doing a 6. 7 cummins p pump conversion, you're probably chasing after that legendary mechanical reliability that made the old 12-valve engines so famous. There is just some thing in regards to the marriage associated with a modern, high-displacement 6. 7 block out and the brute-force simplicity of a P7100 injection pump that gets diesel powered enthusiasts excited. It's essentially taking the particular best parts of two different eras and mashing them together to create exactly what many consider the particular "perfect" Cummins create.
For yrs, the common rail system found upon the 6. 7 has been the normal. It's quiet, it's efficient, and it makes great power right out associated with the box. But for the guys that spend their trips at the drag strip or the sled draw track—or even these who just want a truck that doesn't rely on twelve sensors to stay running—the typical rail can be a bit of a headaches. That's where the P-pump is available in.
The Appeal of Heading Mechanical
The particular main reason anybody even looks from a 6. 7 cummins p pump setup is to get rid of the consumer electronics. Let's be honest, chasing down a wiring harness concern or a defective sensor in a common rail system is enough to generate anyone want to pull their curly hair out. Once you exchange over to the P7100 mechanical pump, you're stripping away the computer's control of your fuel time and pressure.
Once that pump is timed and the outlines are cracked, it's likely to run. A person don't need the laptop to tune it, and also you don't need to worry about an ECM deciding to move into limp setting because it didn't like a particular voltage reading. It's a purist's strategy to power. Plus, the 6. seven block offers you even more displacement than the aged 5. 9, which usually means more torque and a better foundation for high-horsepower builds.
What Does the Transformation Actually Involve?
You can't simply bolt a P7100 onto a six. 7 and call it a day. It's a little more involved than a Saturday afternoon oil change. Given that the 6. 7 was never designed to house a mechanical pump, you possess to swap out there the front gear housing. This will be usually the "big" part of the job. You'll require a conversion housing (or an adapter) that allows the P-pump to sit in the proper position to gear-drive off the camshaft.
Then there's the particular issue of the fuel lines. The common rail injectors are usually completely different from the mechanical types. You'll need custom high-pressure fuel lines that run through the P-pump towards the head. Speaking associated with the head, you usually have to operate a 12-valve style injector or use special adapters to create mechanical injectors match into the 24-valve 6. 7 head. It sounds like a lot of function, and it is, but the particular end result is really a truck that seems like a totally different animal.
Choosing the Right Pump
When you're looking at the six. 7 cummins p pump project, the pump itself is the particular star of the show. Most guys go for a 12mm or perhaps a 13mm P7100. If you're developing a daily car owner that you would like to become reliable but still fun, a 12mm pump with some mild tweaks is usually a lot. It'll give a person great streetability plus won't become an overall nightmare to begin within the cold.
On the other hand, if you're building a devoted competition truck, that's once the 13mm penis pumps and huge plungers enter into play. These types of can move a good insane quantity of fuel—enough to support well over 1, 000 horsepower if your air flow setup can keep up. Just maintain in mind that will the bigger you decide to go on the pump, the more "fussy" the truck becomes in normal driving problems.
The Energy Potential of the 6. 7 Block
The 6. 7 Cummins is a beast. Compared to the particular 5. 9, this has a larger bore and a longer stroke. This means it naturally wants to make more low-end torque. Whenever you combine that will extra displacement with all the aggressive fueling of a P-pump, the outcomes are pretty crazy.
Mainly because the 6. 7 head flows considerably better than the old 12-valve heads, you're getting more air flow into the cyl without needing to do simply because much porting plus polishing. When you've got very much surroundings and you're shoving a massive amount of mechanical fuel to the mix, you finish up using an energy curve that's extremely linear and pleasing. There's no waiting around for the computer to "catch up" or calculate the particular load; you hit the pedal, plus the fuel can there be instantly.
Coping with the Trade-offs
It's not most sunshine and rainbows, though. We have to talk about the trade-offs. In the event that you're used to the quiet, refined idle of a typical rail 6. 7, a 6. 7 cummins p pump swap is usually going to become a bit associated with a shock. It's loud. It rattles. It has the aroma of the tractor. For most of us, that's actually a marketing point, but it's something to consider if you utilize the pickup truck to a family event road trips.
Also, you lose some of the "finesse" that electronics provide. Cold starts may be a little bit more of a chore, especially if a person haven't dialed within your timing perfectly. You'll likely observe more smoke, too. Since the mechanical pump doesn't are able to precisely trim energy based on boost levels in current (at least not really as well as an EFI Live tune), you'll need to be more mindful of your right foot to maintain from "blacking out" the intersection.
The Cost Element
Let's chat money for a second. This isn't exactly a budget-friendly mod. Between the pump, the conversion kit, the lines, the particular injectors, and the labour (if you aren't doing it yourself), you're looking from a significant investment. Nevertheless, many guys justify the price by looking at what it might cost to continually replace CP3 pumps or expensive injectors on a high-mileage common rail. Once the P-pump is on there, it's basically a "one and done" situation. These penis pumps are known to last hundreds of thousands of miles with very little maintenance.
Is definitely It Right for Your own Build?
Choosing to go using a 6. 7 cummins p pump setup really comes down to what you would like out of the truck. If you're chasing maximum energy economy and a person want a silent ride, stay along with the common rail. Modern tuning has come a long method, and you could make plenty of power along with a CP3.
But, if a person want that raw, mechanical connection to your engine—if you want to understand that your truck will start even if an EMP goes off—then the P-pump may be the way to go. This turns the 6. 7 into a modernized version of the legendary 12-valve. You get the strength and displacement of the new wedge using the bulletproof fuel system of the old school.
It's definitely the project for somebody who loves to change a wrench plus isn't afraid associated with a little grease. At the finish of the day time, there is just nothing like the particular sound of the P-pumped 24-valve screaming straight down the track. It's a classic regarding a reason, and putting it upon a 6. 7 just takes that will legacy to the particular next level.