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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?
__________________ 2010 CCLB F350 King Ranch - Sinister EGR Delete, Coolant filter - No Limit Intake - CCV Mod - Mini Max HD300 - 4" flo pro duals
1/4 mile 13.1 @100 spinning in 4x4
The Following User Says Thank You to 600crpower For This Useful Post:
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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The Following User Says Thank You to MegaB For This Useful Post:
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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