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Going down the road at speeds over 30 mph, the IAT averaged 10 degrees over the ambient temperature (70 degrees ambient, 80 degrees IAT). On the dyno the IAT was 130 to 140 degrees over, causing 8 to 10 degrees of timing retard. Whenever the IAT goes over 110, the computer pulls out timing to keep the engine safe from detonation. Here we tried moving the air filter into the steam of air coming from the dyno fan, but it didn't help. Even though the big dyno fan moves a large volume of air, it moves it at only 15 to 20 mph—not enough for the intercooler to efficiently cooldown the IAT. The upgrades to the fuel system helped Hauffe tune to a safe 11.3 to 11.5 A/F. Power jumped up to 583 rwhp at 6,100 rpm (10-11 pounds boost) with the timing at only 10 degrees.