Engine failure, rebuild, with turbo, jakes.

Iceman3005

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Heads will be fine if it is turbo charged, if not, you need to have the hole into the intake. 400 injectors will not work because the cam is different. More lift on the 400, .266 V.S. .176 IIRC. Even if I am wrong on the measurement, the BC is WAY different than the SC, you will have a smoke machine, plungers will not seat in the cups.
Lift and duration have nothing to do with the plunger seating.

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WillWagner

The Person You Were Warned About As A Child
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Lift has no bearing on the plunger seating? Explain that. If there were no duration, or outer base circle, carbon would be pushed back into the injector cup, then you'd be changing injectors constantly.
 

simp5782

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The big cam injectors will have the Temps too high and you won't have enough air regardless of lift/duration.

Big cam 1,2,3 and small cam heads are the same. Big cam IV heads are different on the exhaust port size.

Call Warren at premco diesel in Texas he can make your some mild over 250 injectors. He is pretty cheap on prices.
 

WillWagner

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Exhaust port size was reduced to speed exhaust gas flow. They are interchangeable, can be mixed on any engine, SC or BC. Only thing difference is the hole in the intake. ReCon heads come with a plug kit and include the 1/16 inch PP to plug the holes on early heads for turbocharged engines.

Still waiting on how the cam lift / profile has no bearing on plunger seating.....
 
Last edited:

WillWagner

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Where are the cracks? Some counterbore cracks were/are acceptable. Cracks from water passages to the counterbore are easily repaired with a threaded insert. Pics?
 

Mullaney

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Mullaney

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Just found TM's for the bigcam II 400! Sweet! TM-9-2815-226-34-1

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So, is the NTC-400 a bolt in replacement for the NTC-250 ?

While gathering info, I found a place called NPDDiesel.com and they sell re-manufactured power. Cummins and CAT. The NHC-250 was surprisingly reasonable compared to a "good takeout". Of course there is a range and I haven't taken the time to dig very deep.

Does anybody here have experience with these folks?
 

Iceman3005

Active member
925
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Location
Jonesville, MI
.
So, is the NTC-400 a bolt in replacement for the NTC-250 ?

While gathering info, I found a place called NPDDiesel.com and they sell re-manufactured power. Cummins and CAT. The NHC-250 was surprisingly reasonable compared to a "good takeout". Of course there is a range and I haven't taken the time to dig very deep.

Does anybody here have experience with these folks?
Only paid $1500 for the complete Bigcam 400. Couldn't come close to that rebuilding the nhc250, then add a turbo, more power. The small cam is to nortourios for eating cam shafts. Not worth dropping 3-4k on that engine.

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