Excellent, some actual testing results. Don Hanson The second idea worked well and is a real solution. The open underside of th= e vanagon is a real drag component. We got a set of thin 0.0625 inch Al shee= t stock and enclosed (frame rail to frame rail) and basically covered the un= derside from the front to the transmission. We added louvered slots for the=20= radiator air flow, left the spare tire cover operable and stayed away from s= uspension components. Big decrease in drag - minimum 8% max 15%. 15% came wh= en we added the Diesel sound box cover. Serviceability was a problem. The sy= stem has been removed as I complete the front to back dual muffler system fo= r the TDi and the diesel fired heater. No temperature measurements, but we p= rovide for air inlets at front by gas tank and at egress at the rear. Work i= n progress. Frank Grunthaner=C2=A0 |
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