Western Railroad Discussion > First EMD Tier 4 locomotive

It has been reported that EMD's first Tier 4 locomotive is heading to Minneapolis for RSI Show. The locomotive is currently tarped but should be visible once it reaches Minneapolis and the show starts.

6 axle? 4 axle? switcher? passenger? emd's catalog with cat will have a full range of engines for the first time since the mid 1970's. any clue as to what it may be?

Will Hemb
Flower Mound, TX

Someone at LocoNotes shared a pic of a tarped 6-axle unit numbered 2012. Only thing visible were dark blue ditchlight housings. I wonder if this the same thing?

Sounds interesting.We railfans may have something new to see from CAT/EMD for a change.As soon as anyone can get some pictures please post them.The GEs are really getting to be very stale bread out there.Hopefully a new era in good looking locomotives is upon us.

msdgbar Wrote:
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> Sounds interesting.We railfans may have something
> new to see from CAT/EMD for a change.As soon as
> anyone can get some pictures please post them.The
> GEs are really getting to be very stale bread out
> there.Hopefully a new era in good looking
> locomotives is upon us.


True enough! I think back to the 70's when things were popping like crazy from EMD and GE.

It has a black underframe and silver trucks--I like it already. Ditto to the blue ditch lights. White (maybe silver) end handrails also. Photo of it on RRPictureArchives.Net

Pump



Edited 1 time(s). Last edit at 08/28/11 01:19 by UPTRAIN.

If links are allowed here, here it is...

http://www.rrpicturearchives.net/showPicture.aspx?id=2696702

Looks like an SD70ACe...

Jaanfo Wrote:
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> Looks like an SD70ACe...

I would expect it to be based on the SD70ACe, although EMD might change the model designation with the debut of Tier 4. It will bring more changes than Tier 3.

Its an aceish with new motor. Will prob sound like the ns motors with cat power a little quiet and more like a loud construction tractor at speed.

peoriarr1 Wrote:
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> Its an aceish with new motor. Will prob sound like
> the ns motors with cat power a little quiet and
> more like a loud construction tractor at speed.

Why would a EMD 710 2-stroke sound like the NS Cat-powered 4-strokes?

I'll be extremely surprised if it is in any way more esthetically pleasing. If there is a diesel particulate filter, that's probably yet another "box" somewhere on the carbody. On the other hand, NS's latest PR43C showed up with a very nice looking cab design, and I'd assume that would have to be in the same Progress/Cat/EMD toolbox.

SOO6617 Wrote:
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> peoriarr1 Wrote:
> --------------------------------------------------
> -----
> > Its an aceish with new motor. Will prob sound
> like
> > the ns motors with cat power a little quiet and
> > more like a loud construction tractor at speed.
>
> Why would a EMD 710 2-stroke sound like the NS
> Cat-powered 4-strokes?


Why would it have to be a 710?

The 710 is basically Tier 4 compliant I believe, somebody feel free to correct me, but I remember reading little if any modifications need to be made to get it Tier 4 compliant.

They are just doing the EGR trick to make it meet 4, I read.

SD45X Wrote:
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> They are just doing the EGR trick to make it meet
> 4, I read.


EGR?

- Jeff

Exhaust gas recirculation. IIRC it lowers combustion temperature and reduces NOx creation.

EGR like in an automobile EGR valve?

SBC_1344 Wrote:
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> EGR like in an automobile EGR valve?


Kinda, diesels require a EGR cooler to cool the exhaust gasses before being fed back in the intake.

This is a common and expensive source of failure on many of today's road going diesel engines.

It's expected that variable valve timing being tested by Cummins, Daimler and GM (not jointly, all on there own) will make EGR a thing of the past on road going diesel engines.

There are a lot of rumors floating around on just how EMD plans on meeting Tier 4, I've never seen or heard of a EGR system being used on something this big, but I guess there is a first for everything.

Cool. The boss keeps making noise about me not going to AREMA/REMSA this year, but so far I'm still there. I'll do my best to post some photos.

Do you think it's tarped to keep the paint job a surprise or just to keep it clean and graffiti free?

Greg

Greg Ramsey
Las Vegas, NV