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Old 08-28-2012, 11:53 AM   #1
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Exclamation DOES a compression brake whistle

Do I look for a window open / slide a jar or do compression brakes whistle ?

I got the High Low or Off ISC 369 engine ?
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Old 08-28-2012, 12:03 PM   #2
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I have an exhaust brake and when I use it you get a whisle sound when activated.
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Old 08-28-2012, 12:42 PM   #3
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The Ventana has an exhaust brake, which can make that type of sound.

Dutch Star and above have an engine compression brake.
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Old 08-28-2012, 01:16 PM   #4
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Uh no I have a two stage compression brake ?

It has a high low - off -----------selection switch ?

I have a 43 foot model -------- ?



For the record my Ventana costs more than most Dutch Stars --- it was loaded
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Old 08-28-2012, 01:29 PM   #5
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I stand corrected.

However, engine compression brakes don't whistle.

The only sound should be a very muffled staccato unlike the very loud staccato from a 18 wheeler with no mufflers.
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Old 08-28-2012, 02:15 PM   #6
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The slight whistle is most likely the turbo and normally it is louder when the engine RPM's are coming down.
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Old 08-29-2012, 06:21 PM   #7
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thanks folks really
I use to have a VGT ISB exhaust brake and this compression brake is new to me the whistle had me stumped
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