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73-87 Chevy _ GMC Trucks => Diesel Engine Discussion => Engine/Drivetrain => Cummins Swaps => Topic started by: 601jack89 on January 24, 2015, 08:32:15 pm

Title: Difference in cummins engine?
Post by: 601jack89 on January 24, 2015, 08:32:15 pm

Hey guys thanks for the time and help.  I have a 1992 cummins that came out off a D250 and I am trying to rebuild it.  My question is what is the difference between the the 89-93 and the 94-98.5 engine? The rebuild kits I keep seeing for sale keep saying 94 and up. Also what "brand" rebuild kits are good and reliable?

Title: Re: Difference in cummins engine?
Post by: Engineer on January 24, 2015, 08:37:27 pm

1994 was the year Cummins introduced the "P" pump. Regarded by most to be the best mechanical injection pump offered on the Cummins engine.

1998 was when they went to the four valve head.

Title: Re: Difference in cummins engine?
Post by: Engineer on January 24, 2015, 08:39:00 pm

Oh, and having had NTC-350 Cummins "Big Cam" engines in the past I can only recommend original Cummins factory parts.

Title: Re: Difference in cummins engine?
Post by: 601jack89 on January 25, 2015, 07:03:56 pm

So there are no differences in the block?

Title: Re: Difference in cummins engine?
Post by: Irish_Alley on January 25, 2015, 08:54:40 pm

block no but add ons yes. you can convert a ve pump (89-93) to a p pump

Title: Re: Difference in cummins engine?
Post by: 601jack89 on January 26, 2015, 08:50:30 pm

Yea I new about the pumps and all the additional electronics after 1998.5 but I just wanted to make sure before I bought part.  Although the original cummins parts are outstanding are there any better performance brand names that would perform even better?