Happy Fourth of July!
Alrighty folks finally getting caught back up on things and had a moment to make this thread as i had mentioned in the other build thread.
Backstory/history in this post, next post will have pics/specs/progress. So skip ahead if you don’t want to read the history of this project, you’re not really missing anything
Starting from the beginning, I have been working on this conversion for some years now, and have spent a good amount of time ruling out certain pump options and trying to find the best fit for our engines, mostly dealing with availability of parts/cost, packaging size, and firing order. This conversion is not about making 1000+ horsepower IDIs, because frankly I don’t think these engines will ever do it, but more as an upgrade from the problematic db2 platform. Don’t get me wrong, a rotary style pump is great on an 80 hp tractor because it’s simple and small in size, but it’s a real limiting factor in the performance and reliability of these engines.
My motivation for this conversion is to get a pump that:
1- Doesn’t require a rebuild every 150k miles, but instead out lives the life of the engine
2- Is compatible with bio fuel, wvo, and wmo
3- Is easily modified to support 500+ hp
4- Provides a flat fuel curve to support the rpms these engines can run
After whittling down my list of pumps to try I found that the old 3208 cats I grew up with had the same firing order as our engines, and their injection pumps were in a V configuration with two seperate banks of plungers which made for a much nicer package.
Doing more research it seemed these pumps were pretty middle of the ground in performance and came with 8mm plungers, and 8.5mm on the turbo models. Lowest horsepower rating for this pump is 225 hp, and highest being 475 in a marine application, so this pump should be able to go from a mid 200hp setting to double that with a turn of some screws and no internal modifications.
Recently I picked up a 3208 pump for very cheap, and got right into making measurements and seeing what gotta be custom and what can be made to work:
Alrighty folks finally getting caught back up on things and had a moment to make this thread as i had mentioned in the other build thread.
Backstory/history in this post, next post will have pics/specs/progress. So skip ahead if you don’t want to read the history of this project, you’re not really missing anything
Starting from the beginning, I have been working on this conversion for some years now, and have spent a good amount of time ruling out certain pump options and trying to find the best fit for our engines, mostly dealing with availability of parts/cost, packaging size, and firing order. This conversion is not about making 1000+ horsepower IDIs, because frankly I don’t think these engines will ever do it, but more as an upgrade from the problematic db2 platform. Don’t get me wrong, a rotary style pump is great on an 80 hp tractor because it’s simple and small in size, but it’s a real limiting factor in the performance and reliability of these engines.
My motivation for this conversion is to get a pump that:
1- Doesn’t require a rebuild every 150k miles, but instead out lives the life of the engine
2- Is compatible with bio fuel, wvo, and wmo
3- Is easily modified to support 500+ hp
4- Provides a flat fuel curve to support the rpms these engines can run
After whittling down my list of pumps to try I found that the old 3208 cats I grew up with had the same firing order as our engines, and their injection pumps were in a V configuration with two seperate banks of plungers which made for a much nicer package.
Doing more research it seemed these pumps were pretty middle of the ground in performance and came with 8mm plungers, and 8.5mm on the turbo models. Lowest horsepower rating for this pump is 225 hp, and highest being 475 in a marine application, so this pump should be able to go from a mid 200hp setting to double that with a turn of some screws and no internal modifications.
Recently I picked up a 3208 pump for very cheap, and got right into making measurements and seeing what gotta be custom and what can be made to work:
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