[aerohead]

1) We ought to be able to 'solve' the 60- mpg question numerically.
2) To do so, we need all the baseline data we can get:
- Cd
- Af
- Test weight
- Test velocity
- Baseline mpg at test velocity
- Baseline gallons/hour at that constant velocity
- Baseline pounds-fuel / hour consumption
- Road load aero power requirement
- Road load R-R power requirement
- Transaxle mechanical efficiency ( National labs have provided estimates for that data )
- Engine accessory losses ( National labs have provided estimates for that data )
- Engine thermal efficiency ( National labs have provided estimates for that data )
- Engine Brake Specific Fuel Consumption ( BSFC ) can be calculated from all the above data.
--------------------------------------------------------------------------------------
3) Once we have the above data, we can reverse-engineer a new Road Load Horsepower, which, at your BSFC, would satisfy the 60- mpg requirement.
4) From the new Road Load, you can play with alternate scenarios for drag coefficient and rolling resistance, full-synthetic lubrication package, cannibalistic accessory losses, etc.
We need to know as close to possible, exactly where we're starting from, in order to get to where we want to go.
-------------------------------------------------------------------------------------
I may have a CAR and DRIVER road test for your car in my rat's nest. Csaba Csere may have still been technical director at that time, and if so, we'll have a full-page of technical specifications, and some aerodynamic coast-down test data from the Chrysler Proving Grounds on the car. I'll look for it.