Any real difference between GP20 and GP30 prime mover sounds?

[BRAKIE]

fieryturbo

So I have a GP30 sound set for my SDH166D decoder.  Would there be any real difference between these two locomotives to merit a change in sounds?  One is 567D2 Turbo, and one is 567D3 Turbo.  Was there really a difference sound wise?

 

Yes,The GP20 sounded like a GP9 and  GP18 while the GP30 had a similar but,deeper sound with a turbocharged whistle. There was no mistaking a GP30 for a GP20. 

[wjstix]

Horns were either ordered by the railroad, or added by them after the engine was delivered. It's not really connected to the type of engine; a GN GP-30 might not have the same horn as a New York Central GP-30, but a NYC GP-20 and GP-30 probably would have the same horn.

The engines in question were made about the time railroads started to change from the single-bell "blat" airhorn to the multiple 3- or 5-chime horn. Quite likely some were delivered with single-chime horns, and a few years later converted...although I think Soo Line GP-30s kept their blat horns til the end.

[fieryturbo]

Thanks, I guess that would be my next question is what other sounds might be different between the two.  Obviously the horns, but I'm guessing others might be different as well.

[jrbernier]

  The 2,000 hp GP20 has a V16-567D2 prime mover.  The later 2,250 hp GP30 has a V16-567D3 prime mover - No real difference in the actual sound of the prime mover.

  What is different is the traction motor blower sound, both not enough to notice in an HO sound system!

Jim

[rrinker]

 Not so as you would actually notice. Slight difference in horsepower, no real differences in the design.

               --Randy

[fieryturbo]

So I have a GP30 sound set for my SDH166D decoder.  Would there be any real difference between these two locomotives to merit a change in sounds?  One is 567D2 Turbo, and one is 567D3 Turbo.  Was there really a difference sound wise?