EMD prime movers

[Anonymous]

I would like to know what prime mover and the differences between them for each EMD model from the GP/SD50 on up to the SD90's.

[nfmisso]

50 series had 645 engines, the turbo V16 rated at 3500 or 3600hp.

60 series had 710 engines, the turbo V16 rated at 3800hp.

70 series has 710 engines, the turbo V16 rated at 4000hp.

75 has 710 engine, the turbo V16 rated at 4300 or 4400 hp.

80 series has 710 engines, the turbo V20 rated at 5000hp.

90 series had 1265 engines, the twin turbo V16 rated at 6000hp.

The SD90/43MAC have the same engines as the SD75s.

The number 645 and 710 represent the cubic inch displacement of each cylinder. These are two stroke fabricated engines. The 1265 is a four stroke cast engine.

Nigel

[Anonymous]

Good job, Nigel! It's nice to see an un-biased, yet well informed reply here once in a while. I almost didn't click on this topic, figuring it would be another "Ford vs Chevy" type B.S., But, alas, there IS intelligent life on this planet. Now, after I read a few more posts, please beam me up scotty!
Todd C.

[Anonymous]

How do they achieve the different hp ratings for the same 710 engines ? Fuel pressure ? Turbo boost ? Rated at A highr rpm ? Thank you !

[Anonymous]

Is not the correct designation, 265H?

[nfmisso]

Dan;

Your are correct; 265H.

Nigel

[nfmisso]

All the standard hot rodders trick are used: better breathing, more fuel, more air, better controls, but generally not higher rpm.

Nigel