4.0OHV EGR vs Non-EGR Camshafts

[Piney]

It's probably been about 12 years since I've posted on this forum, and my ranger has been sitting in the weeds for about that long. I'm finally putting the rig back together, but I let the perfectly good engine get destroyed sitting out in the weather.

Original truck/engine is a 94 Ranger non-EGR. Donor engine is a 97 Ranger w/ EGR. This resource (<- link) indicated there are different camshafts for the EGR vs Non-EGR engines. Does anyone know how exactly they are different? I am trying to decide if it is necessary and worth the extra effort to tear down the donor far enough to swap the camshaft from the original engine, assuming the original camshaft is even still good. I intend to use the original 1994 non-egr computer and dress the donor engine with all the intake pieces from the original and of course go without EGR.

Thanks...

-Eric Steinberg

 

[tinman_72]

Nevermind. You said yours does not have EGR.

That same resource says

Use the F3TZ-B for the ’93-’95 engines that came with EGR and for all of the 4.0L engines from ’96 through 2000, except the ’96 Aerostar that should still use the FOTZ-A. There were a few Rangers built during these years that came without EGR, but they used the F3TZ-B cam, too.

It looks to me like you can use the F3TZ-B cam that should be in the '97.

 

[bobbywalter]

Back to the barons piney debil.....

 

[bobbywalter]

There are many differences....the calibration of the PC can make or break a good running decent engine.

 

[19Walt93]

It's probably been about 12 years since I've posted on this forum, and my ranger has been sitting in the weeds for about that long. I'm finally putting the rig back together, but I let the perfectly good engine get destroyed sitting out in the weather.

Original truck/engine is a 94 Ranger non-EGR. Donor engine is a 97 Ranger w/ EGR. This resource (<- link) indicated there are different camshafts for the EGR vs Non-EGR engines. Does anyone know how exactly they are different? I am trying to decide if it is necessary and worth the extra effort to tear down the donor far enough to swap the camshaft from the original engine, assuming the original camshaft is even still good. I intend to use the original 1994 non-egr computer and dress the donor engine with all the intake pieces from the original and of course go without EGR.

Thanks...

-Eric Steinberg

My friend at Napa has printed me spec sheets for some OEM cams, maybe you could get a Napa near you to print sheets. Then you'd need to be able to determine what the differences would mean.

 

[Piney]

To hell with it- I'll be running the EGR cam with the original non-EGR computer and giving myself a better-than-50% chance that it runs fine. The original 94 non-EGR cam was pitted on a few lobes, so it's trashed and I don't want to sink even another $100 into another junkyard shortblock just for the cam and a goal-post move. Anecdotally, people seem to talk about throwing aftermarket cams in these engines without absolutely needing to re-tune, so...

Not sure if anyone else noticed, but the Doug Anderson write-up references a "Chart 1" that doesn't exist. This is also the case on another website where the same article is posted. The 94 non-EGR cam had two identification rings, and I found that the 97 EGR cam had 3 evenly spaced rings. But without that chart, no way to cross-reference those rings to part numbers. Also curious about the differences in injectors between these two engines, but that could be another thread.