I'm a bit muddy on this

The first gen cummins had 9mm injectors & then was upgraded near the end of it's life to the 7mm injectors?

Does the p-pumped heads swap over to the first gen? If so would you be able to use the higher horsepower second gen injectors?

I await your input.

 

The 9mm injector bores are only on the non intercooled motors. All the intercooled engines have 7mm bores, including P pump heads. You cant use p pump injectors with a ve because the pop off pressure is higher for the p pump injectors.

 

Aren't the pistons different also. I know the injectors have different spray angles from the VE pump to the P pump.

 

You can't run p pump injectors because the injector body has larger thread, 14mm to be exact. You could run ve injectors at p-pump pressures, but I can promise you it won't run well at all and the VE won't like either.

Yes they are slightly different.

 

The non-IC motors are 155* spray angle, the IC are 145*.

"Marine 370" is 155*

The cylinder heads will interchange, but you can't put 9mm injectors in a 7mm head without machining (don't know why you would). You can get adapters to run the 7mm inj. in a 9mm head.

 

Once again the archive came through with the answer to my question.

I have a fellow who has a very low mileage 95 P-Pump motor head (20K miles) He's looking to dump it cheap and asked if I would be interested. So I wanted to make sure a 95 head would work on a 91-93 motor...seems it does.

 

Yes a P-pump head will work on our mess, BUT . . . ..

You will find that while the boss for mounting our throttle bracket is there, you'll see it is not drilled and threaded to mount our throttle bracket.





It's no big deal however to use your bracket as a template, and drill & tap the holes as is needed. As I recall, the holes may go into your charge-air intake log, but it's OK. just use some teflon tape if it bothers you.

 

More great info...Thank you for taking the time to add the info and pics....