Site Navigation

Your Account

Choose Language

High performance products for the newer electronic controlled diesel engines.

12 Questions View all
Discussion Topic

Big cam cummins 4 / N14 swap

How involved would it be to swap out a big cam 4 cummins with an n14 engine in a pete 359? My concerns might be with the radiator coolant tubes size and dash gauges compatibility going from a mechanical to electronic engine. Other than that I don't know much about cummins engines.

Reply to discussion Subscribe to discussion

Is this a worthwhile discussion?

Score 0
Add a comment

4 Replies

Roxanne would be a good person to talk to about this. She has no interest to come to this site so you can go to her if you want.

She is doing this exact project in her 1984 Autocar.

Here is a link to the N 14 group on lets truck

http://letstruck.com/group/cumminsn14

Was this reply helpful?

Score 1

Comments:

I've been watching her discussion she has on the N-14 site, and all I can say is WOW !!! That is awesome that she would take on rebuilding that engine herself. That also a great shop they have. She may come off a little stiff to some people, but I think she knows her stuff... or has me fooled into thinking she does ! LOL

by

She does know her stuff. She is now on this site too helping out. She goes by Islebee. :)

by

Good deal...

by

Add a comment
Most Helpful Answer

'''I made this swap in my 87 359EX HD. The engine is a direct swap and bolt up. I bought a salvage wiring harness out of a wrecked 379 and mounted it in the same location. Replaced the manual accelerator petal with the electronic one. I took a 379 top radiator tank and had a custom bottom tank built due to the fact there are different bolt patterns between the 359 tank and 379. Installed a new core and new air to air.

The radiator mount had to be relocated back about 1 1/2" and down about 3/4" for proper clearance for air to air. All of the manual sending units will mount in the block in the same location as on you old motor. I also hooked up the diagnostics switches and the cruise control switches.

I did have to acquire several salvage air to air tubes to configure the air tube hook up due to the fact that my engine came out of a International Prostar, they had to be cut and fabricated. Took me around 5 weeks for the swap but it was well worth the time.'italic text''

Was this reply helpful?

Score 2
Add a comment

Mawk Industries www.mawkindustries.com makes an excellent conversion harness. 12 wires, all Cummins spec. 12 colors and every wire is marked every 6 inches. I'm not doing a CAC. I got 3 spacers made for the intake side to bolt my after-cooler on.

Ed Mawk will go over all the specs and options with you, before making the harness. Mine was $875 plus $20 ground shipping.

I will have to do some re-routing on coolant tubes. I figure on having a muffler shop custom bend some tubing, to do this.

Otherwise, it's a bolt up. Like pulling a 283 out of a 57 Chevy and dropping a 350 in. Bolts right in, just got to do a bit of adapting.

Update

As to the gauges, they are no problem. I'll be running most of mine the same as I do them on my Big Cam. What gauges do you want to run? I changed over from mechanical to electric. Except for the pyrometer, mine are all JJ for a Pete, back lit red. Oil pressure is a sensor in the oil galley running along the block on the driver's side. Oil temp is a sensor in the oil pan. Water temp is a sensor in the thermostat housing. Tach will be changed to the lead from the ECM, instead of off the flywheel. I already have an electric speedo, driven by a tone ring on the output of the transmission.

If you have a mechanical speedo and want to change to an electric, so you can hook up the cruise control, it's not hard to do. There are two options, available. Either replace the speedometer drive gear, inside the tailshaft of the transmission, with a tone ring, or replace the speedometer driven gear and cable with a signal generator and a pair of wires.

It's all pretty simple.

Was this reply helpful?

Score 1

Comments:

Thank you! Good info!

by

Add a comment

How hard would it be to go from a n14 to a 400 big Cam? A lot of work?

Was this reply helpful?

Score 0
Add a comment

Join the discussion

Mark Harris will be eternally grateful.
View Statistics:

Past 24 Hours: 3

Past 7 Days: 25

Past 30 Days: 124

All Time: 9,489