Quote:
Originally Posted by paintme205
Well I'm unsure of my results at this point. I did the extended boattail, underbelly tray finished and then an alternator delete.
Drove 200 miles at 75-80 MPG. Winds were 45-50 MPH, temperature 45 degrees and speed was 75-80.
I only managed 43 MPG.
With that in mind, I'm going to test the alternator delete to that effect first. If I reconnect it, and mileage isn't better, I'm going to look at the boat tail design with a true a-b-a test.
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Could you give us a sense of the driving conditions under which you achieved your baseline mpg?
*Winds sound like last Sunday.All the 18-wheelers down here pulled off the interstate and parked 'til it blew out.The big-dogs never attempt to test (or race) if the winds are above 8-12-mph.Direction could totally kill your mpg if you had any headwind vector (80 mph + 50 mph = 130 mph airspeed!).
*The 45-degrees will increase rolling resistance and prolong the time and distance to get them up to whatever temp they're going to see.
*The 45-degrees will affect the warmup and equilibrium viscosity of the gear oil in the transaxle,increasing driveline losses.
*The 45-degrees might also have increased the air density compared to baseline,and drag varies directly with density.
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If you're pulling that kind of mpg under those kinds of conditions I'd be thinking that your already in 60+ mpg territory under better conditions.I'm impressed!
