One thing, turbo is load sensing irrespective of rpm. If you make more aero improvement s or slow down to reduce aero load the boost will subside even if your at max rpm. Changing to as smaller gear may put you where you have an increased load on the engine and increased boost even when your rpm is reduced. Great job, buy the way. I have an old dodgeslant6 pickup with 3.55 gear and I only get 13mpg empty. I'm so ready to put an airdam and aero bed cover together now.
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