lack of boost with new banks intercooler - Dodge Cummins Diesel Forum
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post #1 of 6 (permalink) Old 02-25-2013, 02:48 PM Thread Starter
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lack of boost with new banks intercooler

I got a new inter cooler and my boost dropped to 30psi at wot, with the factory one I saw 36 at wot. any ideas?


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post #2 of 6 (permalink) Old 02-25-2013, 03:02 PM
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It may be because you are flowing more volume now which could decrease pressure. Remember pressure isn't power. It's how much air you get in. In a nutshell there probably is less restricion with the new cooler causing less pressure. Does it feel any different? EGTs change?

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post #3 of 6 (permalink) Old 02-25-2013, 03:24 PM
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I don't know if the banks is honestly a more efficient cooler than the factory, but if it is that would also contribute to the lower boost pressure.

Same amount of air, if cooled more, will take up less space and therefor lower pressure.

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post #4 of 6 (permalink) Old 02-25-2013, 04:32 PM
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Aftermarket (bigger) Intercoolers do not make more boost . They allow more airflow with the bigger tubes and exchanger . This does not increase pressure , just the opposite . 600crpower hit it on the mark with what he said .

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post #5 of 6 (permalink) Old 02-25-2013, 04:33 PM
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You have a small boost leak somewhere

I GAINED about 3 PSI with my BD Cooler

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post #6 of 6 (permalink) Old 02-25-2013, 05:20 PM
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lack of boost with new banks intercooler

Check all your boot connections, could have enough of a leak to drop peak boost by 6 psi, I do agree that a bigger, more free flowing IC will drop boost psi some but I don't know a whole 6 psi. Just sayin check your boot connections! Good luck!


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