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Originally Posted by bluecivichybrid
Xcel wanted to know how well the 06 HCH did in HS-FAS, so here are the results from my first high speed FAS in my 06 HCH today
9 mile trip on I-280 highway, 46 degrees F, dry road, no wind, @ around 47 mph --- 106.0 mpg ---
Because 280 has many small hills, I first accelerated to 45 mph, entered ev-mode over the top of each hill, and glided down each hill in ev-mode up to 50 mph. I stayed in ev-mode uphill again until my speed dropped to 45 mph, and then i got out of ev-mode and held my speed at 45 mph and repeated.
The mileage was great but I had to use assist about 2-3x more than usual to maintain speed in ev-mode. I also pissed off many people driving behind me in the right lane, but they readily passed me. Battery state of charge remained steadily around 66%. I think if I do this too much, I will shorten the lifespan of the battery, but if it doubles my mileage, then its a tradeoff to think about..
How long/many miles is that ima warranty again?
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That's great! What stretch of 280 were you on, and in what direction? In addition to the ups and downs, there are several sections (like starting at Serramonte heading South) where there's a significant overall loss of elevation that would help you out. On a mostly flat 5-mile section of country road, I was only able to get a 2:1 glide:pulse ratio, although it was at slower speeds (25-45).
I haven't been able to do any good P&G tests because of a lack of truly flat terrain in my area. What I have noticed is that terrain makes a huge difference, and it's not just the overall elevation gain/loss. For example, you will get much better mileage going over a hill with a short (steep) upside and a long (gradual) downside vs. the opposite, even when the elevation at the start and end points are the same. I can't generalize about 280, but I can think of several sections where the topology could produce very good mileage numbers.
I'd be interested to hear what you get on the same section you did your first test on, but going the opposite direction.
At some point I want to go out into the Central Valley (flat!) and do some P&G experiments without hills in the equation.