CAV Injector tip specs or differences

[slimbo]

I am working on a ford tractor with a 401 diesel engine. I need to replace some injector tips, so I am just going to replace all 6. Years ago the tractor dropped a valve and that injector tip was replaced at that time. This one is a different number from all the rest. 5 of them are DLL150s6666 and the newer one is DLL150s6790. Does anyone know what the specs are between these two? The pressure face is different on them. the 6790 is flat while the 6666 has a recess in it. Obviously they both work fine though... I have a manual with the pop pressures..(2750-ish psi if I remember right) I assume that is the same with both tips...

The 6666 seems easier to obtain a genuine Delphi.. While the 6790 seems to be mostly aftermarket (Interstate Mcbee, and no-names) which I am a bit weary of.

The original NH part# is D9NN9E527CA FWIW....

Thank you

 

[1948CaseVAI]

I am working on a ford tractor with a 401 diesel engine. I need to replace some injector tips, so I am just going to replace all 6. Years ago the tractor dropped a valve and that injector tip was replaced at that time. This one is a different number from all the rest. 5 of them are DLL150s6666 and the newer one is DLL150s6790. Does anyone know what the specs are between these two? The pressure face is different on them. the 6790 is flat while the 6666 has a recess in it. Obviously they both work fine though... I have a manual with the pop pressures..(2750-ish psi if I remember right) I assume that is the same with both tips...

The 6666 seems easier to obtain a genuine Delphi.. While the 6790 seems to be mostly aftermarket (Interstate Mcbee, and no-names) which I am a bit weary of.

The original NH part# is D9NN9E527CA FWIW....

Thank you

If they both work fine why not simply go with the genuine part that is easier to get?