Project: The New CDD Shop Truck

Thewespaul

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If you read back a few pages you’ll get the run down, basically I have been doing some testing and taking temperature readings on the return line of the injection pump, where I saw near 180* keeping in mind this is with no hood and 90 mph of air cooling the engine and injection pump. With a closed hood I’m sure the temperatures would exceed 200*

Diesel fuel thins drastically as temperature increases which means the pump is not able to displace as much fuel. Additionally, the increased heat decreases the effectiveness of diesel as a lubricant, and the high temperatures are terrible for longevity of seals.

In short my goals are to lower the fuel temperature to get more fuel out of the stock pump and to possibly increase the longevity of the db2 with less internal heat and better lubrication. We’ll see how far I can get with that LOL
 

Thewespaul

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Fresh set of injectors came in for the shop truck today from my builder. I’m pretty proud of these ones, my builder (who has asked to stay unamed) is a marine and heavy equipment injector supplier. One of his biggest clients is 3m, which has a plant near his shop. They mostly buy injectors from him for their big generators that have an interesting fuel system.

The main injectors on these diesels are a bit longer than most peoples arms, but on startup and warmup, they run only on a smaller injector which has a similar body to the stanadyne injectors used in our trucks. The nozzles in these injectors are a very unique design that are set to pop at 3200 psi, with the focus on getting the best atomization possible to start these engines cold. 3m replaces these injectors after 150 hours of run time, which isn’t much but comes out to about once a year.

This means my supplier ends up with a big inventory of these injectors with very little use with a unique application that very few people have.

I have been doing some testing with these nozzles in our injector bodies with great results, because of the nozzle grind these have, you can drop the pop pressure very low and still have a beautiful pattern, in a lot of cases better than new injectors spray out of the box. Since these injectors use such a low pop pressure, the pump has to work much less to overcome the seat pressure to fire the injector, which gives you more fuel flow overall.

These injectors feature a reused standard stanadyne injector body to keep costs down, a reground 3m nozzle, and a unique pop pressure. This is the first set of its kind, and if they run well for a good 10-20k miles on this truck, i will make them available for sale. Looking forward to getting these in the truck and seeing how they do, maybe late tonight...
 

Dirtleg

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Fresh set of injectors came in for the shop truck today from my builder. I’m pretty proud of these ones, my builder (who has asked to stay unamed) is a marine and heavy equipment injector supplier. One of his biggest clients is 3m, which has a plant near his shop. They mostly buy injectors from him for their big generators that have an interesting fuel system.

The main injectors on these diesels are a bit longer than most peoples arms, but on startup and warmup, they run only on a smaller injector which has a similar body to the stanadyne injectors used in our trucks. The nozzles in these injectors are a very unique design that are set to pop at 3200 psi, with the focus on getting the best atomization possible to start these engines cold. 3m replaces these injectors after 150 hours of run time, which isn’t much but comes out to about once a year.

This means my supplier ends up with a big inventory of these injectors with very little use with a unique application that very few people have.

I have been doing some testing with these nozzles in our injector bodies with great results, because of the nozzle grind these have, you can drop the pop pressure very low and still have a beautiful pattern, in a lot of cases better than new injectors spray out of the box. Since these injectors use such a low pop pressure, the pump has to work much less to overcome the seat pressure to fire the injector, which gives you more fuel flow overall.

These injectors feature a reused standard stanadyne injector body to keep costs down, a reground 3m nozzle, and a unique pop pressure. This is the first set of its kind, and if they run well for a good 10-20k miles on this truck, i will make them available for sale. Looking forward to getting these in the truck and seeing how they do, maybe late tonight...

Now this is very interesting. Please keep us in the loop as you test them. Very curious.
 

Thewespaul

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Haha I’m getting on it!

Currently starting on moving the pump and filter to the frame, and replumbing the truck with -6 an braided. Once I have that done and I don’t have any pressure drop issues like I’ve been having, then the injectors will go in. Figured it would be more of a fair comparison when I’m not lift pump limited.
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Thewespaul

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Okay, if you have ever messed with braided lines you know you are supposed to keep the same manufacturer for lines and fittings. I know better, but rolling with what I got it took about twice as long as it should to make the russel line be happy with the vibrant fittings, but it’s done now.

Sorry for the crappy pics, I’ll try and get some better ones in the light. Here’s the pump and filters on the frame, and plumbed up to the from into the cooler, then regulator, then gauge and ip.
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Set my pressure and checked for leaks. Amazingly everything was leak free the first try, minus my cheap jegs gauge which is leaking.

Took it for a quick pull up my road and seems better. Pressure isn’t dropping, and I’ve got 1.5-2 psi more boost. Wasn’t driving long but fuel temp never got about 145* seems the cooler is working, further driving will tell.
 

YJMike92

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Fresh set of injectors came in for the shop truck today from my builder. I’m pretty proud of these ones, my builder (who has asked to stay unamed) is a marine and heavy equipment injector supplier. One of his biggest clients is 3m, which has a plant near his shop. They mostly buy injectors from him for their big generators that have an interesting fuel system.

The main injectors on these diesels are a bit longer than most peoples arms, but on startup and warmup, they run only on a smaller injector which has a similar body to the stanadyne injectors used in our trucks. The nozzles in these injectors are a very unique design that are set to pop at 3200 psi, with the focus on getting the best atomization possible to start these engines cold. 3m replaces these injectors after 150 hours of run time, which isn’t much but comes out to about once a year.

This means my supplier ends up with a big inventory of these injectors with very little use with a unique application that very few people have.

I have been doing some testing with these nozzles in our injector bodies with great results, because of the nozzle grind these have, you can drop the pop pressure very low and still have a beautiful pattern, in a lot of cases better than new injectors spray out of the box. Since these injectors use such a low pop pressure, the pump has to work much less to overcome the seat pressure to fire the injector, which gives you more fuel flow overall.

These injectors feature a reused standard stanadyne injector body to keep costs down, a reground 3m nozzle, and a unique pop pressure. This is the first set of its kind, and if they run well for a good 10-20k miles on this truck, i will make them available for sale. Looking forward to getting these in the truck and seeing how they do, maybe late tonight...
Sounds like a cool experiment. I'll certainly be waiting to hear how they are working out.
 

Hydro-idi

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Great idea on the injectors. They are hard to come by nowadays, and the really good ones like stanadynes are very expensive lately.
Your helping out the idi community! Good work.
 

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