ex-MARC Units Discussion

Discussion relating to commuter rail, light rail, and subway operations of the MBTA.

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Re: ex-MARC Units Discussion

Postby diburning » Sun Apr 03, 2011 10:33 pm

LLPX2032 wrote:ck4049... I noticed the same thing. These ex-MARC units (and also the #3247) sound like every other GP40/GP40-2 or SD40/SD40-2 I've ever heard (Conrail/CSX for example) with that high pitch turbo whine... yet, I wondered why the MBTA's F40's & GP40's don't sound the same. Are they using a different turbo than was the standard, or is it extra muffling in the exhaust? I know that they're all using the same 16-645E3, but I still have not a clue.


I think it's because the HEP drowns out that sound. If you listen to a GP40MC, or F40PH-2C idling without the HEP on, it sounds just like a regular 645.
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Re: ex-MARC Units Discussion

Postby LLPX2032 » Sun Apr 03, 2011 10:57 pm

Even with the HEP engines shut down, that whine is more noticeable on the freight engines it seems. I'll have to work on capturing some video.
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Re: ex-MARC Units Discussion

Postby DutchRailnut » Sun Apr 03, 2011 10:58 pm

what freight engines ???
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Re: ex-MARC Units Discussion

Postby LLPX2032 » Mon Apr 04, 2011 12:09 am

DutchRailnut... sorry, I should've clarified. I was comparing the MBTA's F40's & GP40's to the sound of freight GP40's and the ex-MARC GP40's.

I found an excellent clip of none other, than the #59 when it was still pulling for MARC. That very loud whistle/whine is present here, especially when departing @ about 1:10, and the HEP is going too. Actually, it can be heard over the HEP, and some distance away when the engineer throttles down. There is still a turbo/whistle on the MBTA commuter locos, but it's not as loud/prominent as on the MARC unit. Anyways, here's the clip. Enjoy!

http://www.youtube.com/watch?v=oUsKwK14fDE

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Re: ex-MARC Units Discussion

Postby daylight4449 » Mon Apr 04, 2011 9:22 am

I still haven't seen the MARC units, but it just makes me wonder if people are looking for ways to trash the MBTA over these engines. The point: go with what works. I cite the Boston Globe article calling the MARC geeps "lemons".
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Re: ex-MARC Units Discussion

Postby diburning » Mon Apr 04, 2011 10:39 am

They're calling them lemons because they ARE lemons. They are old and on their last legs. Why do you think they rejected one and took another one for parts? Unfortunately the MBTA doesn't have an other choice for leasers so they have to make do with what they can get.
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Re: ex-MARC Units Discussion

Postby AEM7AC920 » Mon Apr 04, 2011 10:42 am

diburning wrote:They're calling them lemons because they ARE lemons. They are old and on their last legs. Why do you think they rejected one and took another one for parts? Unfortunately the MBTA doesn't have an other choice for leasers so they have to make do with what they can get.


Lemons! They are not, just ask Mr Davey ;) Lemonade is what they are I believe you have your words crossed lol
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Re: ex-MARC Units Discussion

Postby MBTA1052 » Mon Apr 04, 2011 12:25 pm

Couldn't the Whine come from the turbo in 59??
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Re: ex-MARC Units Discussion

Postby MEC407 » Mon Apr 04, 2011 1:00 pm

Yes, that's exactly where the whine comes from. But all 40-series locomotives have turbos. The question people are asking is, why is the whine from the GP40WH-2s louder/more audible than the whine from the F40s, GP40MCs, etc.

The F40s may seem to have less whine due to the cowl carbody, which also has fewer seams and vents than a GP40WH-2 carbody. The F40PH-2Cs in particular may have a newer model turbo, and the exhaust system may have more muffling. This goes for the MP36s as well.
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Re: ex-MARC Units Discussion

Postby MBTA1052 » Mon Apr 04, 2011 8:28 pm

Has Engine 59 officially entered service yet or still in testing??How is 67 running on North Side!!
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Re: ex-MARC Units Discussion

Postby diburning » Mon Apr 04, 2011 11:38 pm

The 59 has entered service already from what I've read.
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Re: ex-MARC Units Discussion

Postby AEM7AC920 » Tue Apr 05, 2011 7:20 am

59 running on 103/114 this morning and the 67 still holding down things as well had it yesterday to rockport and back. The 1001 had an electrical fire in the cab this am so I'm sure both MARC units will have plenty of work ;).
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Re: ex-MARC Units Discussion

Postby MBTA1052 » Tue Apr 05, 2011 7:51 am

1001 and 1002 are just having some bad lucky smells like a retirement coming sadly!!:(
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Re: ex-MARC Units Discussion

Postby AEM7AC920 » Tue Apr 05, 2011 8:03 am

3/4s of them need to be cut they are tired and old and can hardly pull a 7 car string at speed anymore. I'm curious to see how the MARC engines pull a 7 car string.
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Re: ex-MARC Units Discussion

Postby MBTA1052 » Tue Apr 05, 2011 8:18 am

How often do the MARC engines have 6 or 7 car train??Most of them max. out at 3 or 4 cars and at times pull double head engines with only 3 or so cars!!
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