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Difference between QSB & ISB?

Old 12-28-2006, 07:00 AM
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Difference between QSB & ISB?

The 5.9 that is put in the 3rd generation trucks is a QSB5.9 - right?

What is the differance between the QSB & ISB? Was the ISB the engine that the 2nd gen. trucks got?
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Old 12-28-2006, 07:42 AM
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Nope, it's an ISBe...ISB Echo

2nd Gen 24v's are ISB's

QSB is "Quantum System" B Series ..... From what I've seen, mostly used in AG, and industrial equipment!

ISB is "Interact System" B Series .... Mostly On-road apllications!

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Old 12-29-2006, 02:49 PM
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the Q series is used in marine applications from what I know.
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