Quote:
Originally Posted by bwilson4web
Sorry but I haven't measured the coast down characteristics of either car, yet. However, both have Sumitomo T4s and six of eight tires are 195 width and the other two 175s.
My posting was to suggests some areas that may impact rolling resistance. All I've done for aerodynamics testing with the ZVW30 has been some lower inlet testing in cold weather.
Bob Wilson
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Hi Bob,
Your comments are welcome.
Yea, I read about you using the small tires on the back of your Gen I Prius.
I have put on grill dams (vertical plates to isolate flow into the grill only across the opening in the grill).
I am doing about 60 mpg actual on this car, 4th tank, about 2000 miles. I am not too concerned about this being 8 mpg lower than I would be getting in my Gen II.
I am concerned about the poor coast down performance. If it can be brought back up the Gen II standard, I might have 70 plus tanks in a year with the warm weather and a broken in drive-train. The Gen III Prius has allot of fixes in its warm-up cycle. Like not recycling down to the lower warm-up stages if the car should cool off (as when the thermostat opens on hot days). In the Gen II this results in the car not going into a engine shut-off during a coast. The Gen III does not do this. And also will go into engine shut-off as low as 25 mph when in the Stage 3 of the warm-up cycle (versus 35). Which is very useful...
So, its kinda a shame with all the improvement they have made, to have it not have a mileage improvement impact because of the aero-dyanmic (now) styling, rather than engineering it was with the Gen II car.....
Or at least that is my concern...