... The j-body is not that much lighter. and i'm at only 600' elevation.. and next time I go to the track will be in the evening.
Who knows what the efficiency range is. I don't have the map on me. I know it's far more efficient than the MP45 and plenty are spinning them to 15+ psi on the Cobalts making good power. It's definitely better than the MP45. We'll find out.
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