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Old 03-19-2015, 05:11 PM   #21 (permalink)
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major work

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Originally Posted by Asanelli View Post
so your saying that a trying to achieve a relieable 35 mpg hwy is more than likely out of the question without major work.
To get the mpg the drag has got to come down significantly.And it will likely mean that the TSX will no longer 'look' like an OEM TSX.
Here's a link to HONDA's 2004 IMAS concept car of Cd 0.20.
http://www.autoconcept-reviews.com/c...0usine%201.jpg
You can see what it takes to get to 0.20.

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Old 03-19-2015, 05:28 PM   #22 (permalink)
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30.8 mpg @ 75

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Originally Posted by Asanelli View Post
75 mph avg. hwy
At 75-mph,your aerodynamic road load horsepower is a little over 2.5 X what it would have been under the old EPA HWY mpg metric.
At the old double-nickel 55-MPH speed your TSX is probably good for 39-mpg as she sits.
To get 35 @ 75,you've got to cut that road load down.And streamlining is the easiest way to do it.
The rub however,will be the 'look.'
Many ubermenschen concept cars of fabulously-high fuel economy were tested at 50-mph.
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Old 03-19-2015, 06:50 PM   #23 (permalink)
0.29 Cd and decreasing
 
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You seem so stuck on 75mph, why not just slow down? I take a 40mile trip one way to my parents house and I get there ~2 minutes slower when I drive 60mpg compared to 70mph
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Old 03-23-2015, 11:08 AM   #24 (permalink)
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Originally Posted by tvbd56 View Post
You seem so stuck on 75mph, why not just slow down? I take a 40mile trip one way to my parents house and I get there ~2 minutes slower when I drive 60mpg compared to 70mph
yes admittedly this is true.
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Old 03-23-2015, 11:22 AM   #25 (permalink)
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DISTANCE (MILES): 34

SPEED (MPH) 60 65 70 75 80

TIME PERCENTAGE OF A HOUR
0.566666667 0.523076923 0.485714286 0.453333333 0.425

TIME (MINUTES)
34 31.38461538 29.14285714 27.2 25.5

TIME DIFFERENCE FROM 34 MINUTE (MINUTES)
2.615384615 4.857142857 4.857142857 6.8 8.5

So in reality even driving slower at an average of 80 will attain me 8.5 minutes slower drive time.

In conclusion not that bad.....
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Old 03-24-2015, 02:47 AM   #26 (permalink)
0.29 Cd and decreasing
 
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Just food for thought, I used to drive ~70 and after seeing the difference of how many gph (gallons per hour) are used from 70mph to 55mph I drive from 55-60mph
In my truck it was about 2.8gph @70mph to 2.4gph @55mph
So I started slowing down in my car too and now driving that slow is no big deal to me
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Old 03-24-2015, 06:22 AM   #27 (permalink)
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Quote:
Originally Posted by tvbd56 View Post
Just food for thought, I used to drive ~70 and after seeing the difference of how many gph (gallons per hour) are used from 70mph to 55mph I drive from 55-60mph
In my truck it was about 2.8gph @70mph to 2.4gph @55mph
So I started slowing down in my car too and now driving that slow is no big deal to me
My exact (in principle) situation. But I do drive faster now, driving for MPG. So in a 60, I used to drive 69, then slowed down to 59-60, now I cruise control at 59, and hold the throttle as far as possible while keeping 35+. This let's me bleed the extra speed on hills, until I get to the minimum. On shorter to medium trips, this yields me 35+ with the engine on, on LONG trips, 40+. I don't think I've ever gone to NC under 45 MPG this way. Last years GGP trip was 47 MPG this way, too, if I remember correctly.

57-59 is a sweet spot for my engine in 6th, so your mileage may vary. Haven't been able to find a BSFC for the engine to explore further, maybe the Acura has one available

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