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Old 12-11-2012, 04:36 PM   #11 (permalink)
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Completed an upper grille block this weekend. I removed the grille and traced a newspaper template from the grille trim ring, then cut it out of 0.020 aluminum sheet with mounting tabs that extend past the mounting screw holes.
https://www.dropbox.com/s/dglt6im5juazkhi/IMG_3181.JPG
And a quick comparison to a twin..
https://www.dropbox.com/s/jjgi1fmp1b...%20Comparo.JPG

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Old 12-11-2012, 04:44 PM   #12 (permalink)
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jray: that block looks good.

Next step - remove that deflector from the hood!
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Old 12-11-2012, 04:56 PM   #13 (permalink)
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Yeah- I take long highway trips so rarely that I was thinking to leave it on for better comparison to the baseline, but what the heck, time to shave that moustache!
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Old 12-12-2012, 08:13 AM   #14 (permalink)
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That grill block looks really nice. It kind of reminds me of the newer Acuras.
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Old 01-02-2013, 06:08 PM   #15 (permalink)
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Okay, here's a report on the Odyssey grille block (and bug deflector delete). The van warms up quickly, but water temp locks in solid at 181 F around town and in steady highway driving. Over some 2600 miles of highway driving from Washington to Colorado and back for Christmas vacation, the highest temp I ever saw momentarily was 189. Interestingly, it's not a long hill climb; but the downhill coast afterwards with an idling engine when the temp needle climbs, I assume due to slower water pump speeds.
There were too many variables and poor previous data collection to put a good number on the improvement (I'm also driving faster since confirming that the Ody's speedo reads 4 mph slow at highway speeds (but not the ODO!). However, over this trip during 70-75 mph daytime driving, the van got 21-23 mpg, and the best tank was 25.8 mpg at 65 mph at night (with a tank of 85 octane Idaho ethanol winter blend). This was over some steep highways; we saw 6% for over 6 miles on two occasions, with many other dramatic climbs not posted.

Last edited by jray3; 01-03-2013 at 06:41 PM.. Reason: doubled my round trip odo reading -doh!
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Old 01-02-2013, 06:47 PM   #16 (permalink)
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Quote:
Originally Posted by jray3 View Post
Over some 5200 miles of highway driving
According to Aerohead, if you averaged 60 MPH, you saved 0.6067 gallons!

The only modification that I have done is remove the the crossbars, which were actually airfoil-shaped, but with an AWD automatic, it would be more difficult to see significant improvements.

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