Got 2 Case 188D motors - one from my 66 530CK with the CAV style injectors and the other from a 77 580CK with the pencil style injectors.

I want to use the newer motor in my 530 but keep my newly rebuilt injection pump - will it work? Are the pumps interchangeable? Will the older pump drive the newer injectors? Pop pressure the same between the old and new injectors??

If not, I guess my other option is to swap heads as well..

Thanks,

Jason Weir
This post was edited by Jason Weir at 12:22:18 09/21/11.

The mEl - that's what I needed to know - the local shop will pop test my pencil injectors for free - if they test out ok I'll run them with my newly rebuilt pump.

Thanks,

Jason

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Thanks - I appreciate the info..

So does my pre-pencil pump need to be adjusted\recalibrated to run the pencils at their higher pressure and what are the advantages (if any) of the pencil style injectors?

-J

Jason Weir said: (quoted from post at 13:05:26 09/20/11) mEl said: Jason The old style heads are no longer available from Case and havn't been for years. The fix was to get a new style head, injectors and lines and convert it to pencil. No new pump was required. Your injection pump is ok although the pencils do run at a higher pressure. mEl Thanks - I appreciate the info.. So does my pre-pencil pump need to be adjustedrecalibrated to run the pencils at their higher pressure and what are the advantages (if any) of the pencil style injectors? -J

No it will be fine as is. There is no significant difference between the bolt ins and the pencils. Pencils ran higher pop pressures but your pump wont know the difference if it is in good condition. More often than not the pencils will be replaced rather than rebuilt , while the old style can be retipped and reset by any shop that has a injector tester. Just a thought tho, the 580 pump may be set to a higher fuel delivery rate due to the power required to move the heavier unit around and running hydraulic loads with the front mounted pump. If you like the idea of more power you may want to consider using the later pump. If you would give a local pump rebuilder the numbers off both pumps they could tell you the difference in fuel delivery and rpms. mEl
This post was edited by mEl at 03:46:32 09/22/11.

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Jason The old style heads are no longer available from Case and havn't been for years. The fix was to get a new style head, injectors and lines and convert it to pencil. No new pump was required. Your injection pump is ok although the pencils do run at a higher pressure.
mEl