Cummins 350 injector pump on a 250

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simp5782

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350 has an aneroid that you would need to delete. otherwise it's going to be sluggish or wide open. Maybe a little hot depending on RP and the button. 200rp and #18 button is about max for a small cam with no turbo

It will work otherwise. Nhc250 pump will work on a bigger pump just has less settings. Nuc250 does not have an android its got the blockoff
 

5_TON_TOMATOE

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350 has an aneroid that you would need to delete. otherwise it's going to be sluggish or wide open. Maybe a little hot depending on RP and the button. 200rp and #18 button is about max for a small cam with no turbo

It will work otherwise. Nhc250 pump will work on a bigger pump just has less settings. Nuc250 does not have an android its got the blockoff
Going to run the dual fuel line now, Turbo later- I'm over coming a horrible failure with a valve dropping into my fresh cylinder (Will warned me about this) Just about to redo the one cylinder, and get her running again before turbo
 

WillWagner

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If you run an AFC pump on a non turbo engine, you will have zero power. Needs the turbo to make the pump work. You COULD run air to the AFC....20 psi or so max....and it will work. It will smoke like a freight train on accel!
 

5_TON_TOMATOE

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If you run an AFC pump on a non turbo engine, you will have zero power. Needs the turbo to make the pump work. You COULD run air to the AFC....20 psi or so max....and it will work. It will smoke like a freight train on accel!
Left original pump in place, but used the 350 injectors. Seems to run well, but has the "Freight Train" smoke going on like you mention. Not sure what you mean by running air to it.....
 

simp5782

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Left original pump in place, but used the 350 injectors. Seems to run well, but has the "Freight Train" smoke going on like you mention. Not sure what you mean by running air to it.....
Injectors have too large of an orifice probably. Did you happen to get a number off them?
 

WillWagner

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AND, the cam lift might be different. You need to look in a CPL book or better yet an injector book to see what cam is used. Was/is the 350 a big or small cam?
 

simp5782

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I have the injector book if I had the number on the injector or the cpl for the 350 engine I could tell you everything about it.
 

5_TON_TOMATOE

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AND, the cam lift might be different. You need to look in a CPL book or better yet an injector book to see what cam is used. Was/is the 350 a big or small cam?
Small cam, and non top stop injectors. This is an assumption because the push rods were the same(About the small cam)
 

WillWagner

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Push tube....big one between the cam follower and injector lever or the link from the lever into the injector? Links are the same between SC and BC, PT is different between SC and BC, IIRC SC was a tad longer.
 

5_TON_TOMATOE

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Push tube....big one between the cam follower and injector lever or the link from the lever into the injector? Links are the same between SC and BC, PT is different between SC and BC, IIRC SC was a tad longer.
All the push tubes were the same length from the 350 as the 250
 
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