Evolution of the E7 Engine

[kevgibbs]

Can someone please give me somewhat of a detailed history of the E7? I'm more concerned with the how the fuel system has changed over the years it was produced. (From full mechanical to full electronic controlled)

[brettj3876]

Went from full mechanical injection with the Bosch P pump (p7100) to the semi electronic Vmac 1&2 with the electronic gov housing. Fly by wire. Timing controlled with econovance. Ran off of oil psi with a gear on a swedge basically to advance/retard timing as needed, to satisfy the EPA. Then came fully electronic Etech with unit pumps ran off the cam. 

 

Really it's apples to oranges comparison the old E-7 to the E-tech. The best engine mack ever made was the mechanical E-7 and vmac 1&2. The E tech doesn't even sound like a mack except a tiny bit at idle. 

[fjh]

11 hours ago, brettj3876 said:

Went from full mechanical injection with the Bosch P pump (p7100) to the semi electronic Vmac 1&2 with the electronic gov housing. Fly by wire. Timing controlled with econovance. Ran off of oil psi with a gear on a swedge basically to advance/retard timing as needed, to satisfy the EPA. Then came fully electronic Etech with unit pumps ran off the cam. 

 

Really it's apples to oranges comparison the old E-7 to the E-tech. The best engine mack ever made was the mechanical E-7 and vmac 1&2. The E tech doesn't even sound like a mack except a tiny bit at idle. 

 The origanal E7  was definitely The better of the two But  The main upgrade on the eteck came with the powerleash EB much better holding power! !