EMD 710 Tier II

[Lyon_Wonder]

Since the SD70ACe and M-2 series still uses a variation of the 710, unlike GE’s Gevo, which uses an entirely different prime mover than its Dash9 predecessors, would it be possible to upgrade earlier SD70MAC/M to tier II standards?  If the Tier 2 version of the 710 can fit into earlier mountings I suppose?

[M636C]

Since the SD70ACe and M-2 series still uses a variation of the 710, unlike GE’s Gevo, which uses an entirely different prime mover than its Dash9 predecessors, would it be possible to upgrade earlier SD70MAC/M to tier II standards?  If the Tier 2 version of the 710 can fit into earlier mountings I suppose?

The new engine could be fitted but it could not comply with Tier II without the much larger radiators in the SD70M-2/ACe to control the combustion temperature more accurately. In the same way the GEVO could not meet Tier II without the air to air intercooler, so you couldn't retrofit an AC4400 or Dash 9 with the new engine, even if you changed the engine mountings.

In both these cases, the cooling system is as important as the engine itself in meeting the emission standards, particularly in nitrogen oxides.

M636C