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Old 02-21-2010, 07:32 AM   #90 (permalink)
JasonG
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Join Date: May 2009
Location: Charlotte NC / York SC
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05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
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It seems the rear shape is too abrupt.
I predict detached air flow. 23 deg is too steep.
Try to take it for a drive with the old drivetrain and do some tuft testing before you commit to a mold.
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I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!
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