Quote:
Originally Posted by diesel_john
I got this brillant idea a couple years back that my windshield was too steep and needed to be tilted back, so, I cut a couple inches of an old set of rear springs and put them in. (under body stock)
Well it just killed my top end and mileage, so I put the stock springs back in.
Mileage and top end back to normal.
So I wonder if I raise the rear an inch what will it do?
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My shade tree engineer guess as to why this happened was that you created a wedge under your car, where the air was compressed going from the front to the back creating a bunch of drag.
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2007 Silverado 3500 classic duramax diesel, Allison 6 speed auto, extracab long bed. Doing head gaskets, will probably do econo tune and aero mods next.
Mad max would have driven a metro
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