Joe wrote:You answered your own question. The only (major, there's also electronics issues) difference is that one is AC traction and one is DC. They have the same horsepower, but different traction ratings. They have the same engine, but I don't remember what it is. I'll let the EMD people answer that one.SD70MAC: 16-710G3B-EC
Justin B wrote:I think the SD70MACs delivered to CSX were rated at 4300hp instead of 4000.Those were the earlier SD70MAC's, the newer SD70MAC's that CSX got is rated at 4,300 HP just like the Alaska SD70MAC's that was tact on, the only difference between the earlier and later SD70MAC's is that the radiator intakes are flat on the earlier models while the later models are flared, just like the 5200 series UP SD70M's before they started testing the new SD70ACe's locomotives that came into production a couple of months after for testing.
TerryC wrote:SD70MACs built after March 1995 have a isolated cab. Also there are vents behind the cab and below the rear of the radiators.Thank You for that information Terry I thought you had to be asked for.
http://www.rrpicturearchives.net/showPi ... x?id=30408
http://www.rrpicturearchives.net/showPi ... px?id=1488
http://www.rrpicturearchives.net/showPi ... x?id=28561
keep asking keep learning
Do all of the SD70MAC's that CSX bought new come with flared radiators?No, I think only the 4700 series have them. CSX has many SD70MAC's (90 I believe) numbered in the 700 series--none of them have flared radiators and only 15 are ex-CR.