Did Chessie SD40-2's have Turbo's?

Yes. All SD40-2 engines built carried a 645 turbocharged engine.

I'm sure Hot Water could provide the most comprehensive answer

645E3 16 cylinder turbocharged prime mover

When bumped to switching chores (later in their careers), some of these units would be de-turboed

@EMD posted:

I'm sure Hot Water could provide the most comprehensive answer

OK, what exactly would you like to know?

645E3 16 cylinder turbocharged prime mover

ALL EMD 40 series units have the 16-645E3 turbocharged prime mover. ALL EMD 40-2 series units have the 16-645E3B "high fuel economy" prime mover, with the fire-ring piston and stainless steel piston rings.

When bumped to switching chores (later in their careers), some of these units would be de-turboed

What individual railroads did with their own units after many, MANY years of service, is anybody's guess, and far above my memory grade.

@Hot Water posted

OK, what exactly would you like to know?

Well I want to buy and accurate sound board for my SD40-2 B&O Chessie #7619.

From ESU LokSound web site my choices are...

645 No turbo, 645 turbo or 645 twin turbo.

I did read that Chessie did remove some turbos from helper engines because they performed better at slow speeds.  But I want to try to get an accurate sound file as a road engine, not a helper.

Thanks.

Ron

@Ron045 posted:

Well I want to buy and accurate sound board for my SD40-2 B&O Chessie #7619.

From ESU LokSound web site my choices are...

645 No turbo, 645 turbo or 645 twin turbo.

I did read that Chessie did remove some turbos from helper engines because they performed better at slow speeds.  But I want to try to get an accurate sound file as a road engine, not a helper.

Thanks.

Ron

The correct choice would be "645 turbo" (I've never heard of a '645 twin turbo' anyway).

S508, S710, S730, S732, S775

Are all ESU files recorded from SD40-2s.

Listen to them all and pick the one you want.

645 turbo or no turbo sounds more like Tsunami choices.

S0508 is the article number for the EMD 645 engine.  So we agree.  See below.

Ron

@Boilermaker1 posted:

S508, S710, S730, S732, S775

Are all ESU files recorded from SD40-2s.

Listen to them all and pick the one you want.

645 turbo or no turbo sounds more like Tsunami choices.

Just took a listen.  To my untrained novice ear they all sound alike with maybe just subtle differences in horn and bell.

Thanks All!!!

Ron

This must be your first time with Loksound. All of the files are actual locomotive recordings. All 5 of those files are from SD40-2s. There are a number of files because there are variations (some are Canadian locomotives, different exhausts, etc....) ESU is good like that, as you can have a fleet of the same locomotive and they dont all make the exact same noises. The horns, bells, etc... are all configurable with CVs.

I have 5 Atlas SD40's with LokSound decoders. I use 74508 for all 5. Atlas configures all of their SD40's with a Leslie S3LR so I use that horn from the template pack. The template pack allows the user to select literally dozens of horns and bells as well as other sounds to customize their project.

Some of the other EMD 645E3 sound files have exhaust silencers and different start up and shutdown sequences.

@Ron045 posted:

I've been trying to do some research online regarding Chessie B&O #7619.  An SD40-2 with a 645 Diesel engine.  What I can't seem to determine... Did that engine have a turbo or not?

Does anyone have any personal knowledge or know where I can look to find out?

Thanks!

Ron

Without a turbo that locomotive would be an SD38-2 (2000 hp).

@catnap posted:

I have 5 Atlas SD40's with LokSound decoders. I use 74508 for all 5. Atlas configures all of their SD40's with a Leslie S3LR so I use that horn from the template pack. The template pack allows the user to select literally dozens of horns and bells as well as other sounds to customize their project.

Some of the other EMD 645E3 sound files have exhaust silencers and different start up and shutdown sequences.

That one sounds good too.  Did you invest in the Lok Programmer to modify and add sounds? 

This is my first LokSound decoder.  It looks like most places will load the sound set of your choosing, so I will not need the programmer right away... or at all if I'm satisfied with the sounds.

74508 is pretty nice too.

Ron

May be a more detailed discussion of the difference: A gear driven blower, part of the GM 2 cycle motor, and an add on exhaust driven turbo charger.  ?? My foggy head needs cleared. ??

@Mike CT posted:

May be a more detailed discussion of the difference: A gear driven blower, part of the GM 2 cycle motor,

To be clear, the "motor" is the big electric thing, i.e. Traction Motor, mounted on the axles, which provide the tractive effort. The prime mover is the Diesel engine. And yes, I know the automotive industry uses the term "motor" to describe the engine.

and an add on exhaust driven turbo charger.  ??

Still never heard of an EMD 567, 645, nor 710 2-stroke cycle engine with "twin turbos". The single, large gear driven through an over-running clutch, EMD designed turbocharger was/is more than sufficient to provide combustion air under any and all load conditions, for engines up to and including the 20 cylinders.

My foggy head needs cleared. ??

@Hot Water posted:

Thank you   Foggy head is clear again.

Here are several videos of a Chessie SD40 on a test track using the LokProgrammer. The “clicking” is my mouse using the LokProgrammer on my desktop...

Start-up sequence...

Slow speed operation (speed steps 3 & 4 in 128-speed step mode)...

Manual notching thru 8 rpm levels with bronze bell and horn grade crossing signal...

Reverse operation with independently controlled front class lights...

Radiator fans on (faint “whirr” over locomotive idling)...

Shutdown sequence with air spitters...

This locomotive has a LokSound XL V5.0 decoder with V4.0 sounds and features. I’ve found that the sound files haven’t changed much between V4.0 & V5.0. I prefer V4.0 because the operation is much smoother than the newer version. I’ve adjusted CV’s, start-up voltage, back EMF, altered speed tables but to no avail with V5.0. V4.0 right out of the box offers the best running for a dual can motor locomotive.

ProtoSound 3.0 can’t match LokSound when it comes to sounds, functions and operation. Atlas is probably going to use PS3.0 in their 2-rail models as well as 3-rail so I don’t see myself buying any new Atlas locomotives in the future.

@Ron045 posted:

That one sounds good too.  Did you invest in the Lok Programmer to modify and add sounds?

This is my first LokSound decoder.  It looks like most places will load the sound set of your choosing, so I will not need the programmer right away... or at all if I'm satisfied with the sounds.

74508 is pretty nice too.

Ron

After I got a few of their decoders, I couldn't resist getting the programmer.

Brendan

@catnap posted:

Here are several videos of a Chessie SD40 on a test track using the LokProgrammer. The “clicking” is my mouse using the LokProgrammer on my desktop...

Start-up sequence...

Slow speed operation (speed steps 3 & 4 in 128-speed step mode)...

Manual notching thru 8 rpm levels with bronze bell and horn grade crossing signal...

Reverse operation with independently controlled front class lights...

Radiator fans on (faint “whirr” over locomotive idling)...

Shutdown sequence with air spitters...

This locomotive has a LokSound XL V5.0 decoder with V4.0 sounds and features. I’ve found that the sound files haven’t changed much between V4.0 & V5.0. I prefer V4.0 because the operation is much smoother than the newer version. I’ve adjusted CV’s, start-up voltage, back EMF, altered speed tables but to no avail with V5.0. V4.0 right out of the box offers the best running for a dual can motor locomotive.

ProtoSound 3.0 can’t match LokSound when it comes to sounds, functions and operation. Atlas is probably going to use PS3.0 in their 2-rail models as well as 3-rail so I don’t see myself buying any new Atlas locomotives in the future.

WOW!!!!!  THAT SOUNDS AWESOME!!!  Thank you so much for sharing.

May I ask why you went with the 5 XL vice the 5 L?  I was considering the 5L.  How was the room inside for "fit".  How did you mount the board?

BTW that is a beautiful model. 

Ron

Actually, I use L’s and XL’s. The L’s are nice because they mount easily to the frame which makes wire routing neater. I mount the XL’s to the shell. They’re nice because they have screw terminals which makes for quick connections.

Thanks for the compliment. Atlas makes a nice model, it’s just too bad they’ve been slow to release anything lately.

The L should be fine for that model. I 3D print sleds to mount it to the holes the old atlas dogbone board went in.
L installation requires a decent soldering iron to mount everything to the socket board, but it’s not too hard. Just be mindful of the fact that there’s not a ton of room side to side in the shell, sometimes soldering the wires to the bottom of the socket board facing inward is necessary for the shell to fit on without forcing it.

if you’re accustomed to 3 rail sounds, I’m sorry to say that you’re about to be ruined.

@Boilermaker1 posted:

The L should be fine for that model. I 3D print sleds to mount it to the holes the old atlas dogbone board went in.
L installation requires a decent soldering iron to mount everything to the socket board, but it’s not too hard. Just be mindful of the fact that there’s not a ton of room side to side in the shell, sometimes soldering the wires to the bottom of the socket board facing inward is necessary for the shell to fit on without forcing it.

if you’re accustomed to 3 rail sounds, I’m sorry to say that you’re about to be ruined.

Thanks for the Photo and information...  That helps a lot. 

Ron

@catnap posted:

ProtoSound 3.0 can’t match LokSound when it comes to sounds, functions and operation. Atlas is probably going to use PS3.0 in their 2-rail models as well as 3-rail so I don’t see myself buying any new Atlas locomotives in the future.

I think that PS3 can hold it's own...

Startup

Notch 1-8

Bell/Horn

The GP snd SD 38-2 and 40-2 locomotives seem to have been the railroad's "Timex" watches.  At the time, EMD was at the top of it's game.