I say uninstall the egr mod, it's not going to yield more benefits than it would harm. Talk to Demon about this in specific. Did you do the EGR mod after putting the EH'd man on? As in, dyno'd with the EGR mod done? And i'm agreeing with Coles about the whole hp at the flywheel dillema. I don't see a way for the guy to just come up with a number at the flywheel by using a standard dyno. He can make a close guesstimate based upon your other runs, but nothing solid.
I searched and this is what Demon has to say about the EGR:
Quote:
Well as long as everyone understands deleting the EGR does absolutely nothing for performance.
Plus not having it operational causes the engine to run hotter since it is used to cool the cylinders on deceleration.