pros and cons of risers. |
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21grandma
Groupie Joined: 04 Jun 2013 Location: Dubuque, Iowa Online Status: Offline Posts: 83 |
Topic: pros and cons of risers. Posted: 17 Jun 2013 at 1:45pm |
Husband nixed the ideas of risers.Said gas mileage would decrease significantly. .....anyone noticed this?
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21grandma
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CharlieM
Senior Member Joined: 23 Nov 2012 Location: N. Colorado Online Status: Offline Posts: 1797 |
Posted: 17 Jun 2013 at 2:07pm |
Probably unmeasurable impact on gas mileage. The real decrease in gas mileage happens when you hook up the Pod. My dealer said the risers were worth their weight in gold. He was only half right. They are worth TWICE their weight in gold.
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Charlie
Northern Colorado OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD |
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hogone
Senior Member Joined: 09 Apr 2013 Location: St. Louis Online Status: Offline Posts: 1042 |
Posted: 17 Jun 2013 at 2:16pm |
Charlie: What do you mean by 'hook up the pod'? Hooking it to the hitch literally due to the weight which obviously reduces gas mileage or hooking up the wiring and using the TV system to charge the pod? Just want to clarify. I could possibly see how risers could reduce mileage, as it would be up approx 3 more inches in the air, but your right, probably minimially.
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Jon & Pam
2013 RP177 2010 F150 2017 HD Streetglide 2009 HD Lowrider CHEESEHEAD |
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Seanl
Senior Member Joined: 19 Sep 2011 Location: Fredericton NB Online Status: Offline Posts: 633 |
Posted: 17 Jun 2013 at 2:31pm |
I never noticed a significant change in gas mileage between with and without Risers. I had my trailer a year before I put on the risers.
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Sean, 2011 Rpod RP-173,2009 Jeep Liberty Rocky Mountain Edition
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rpodcamper.com
Admin Group - pHp Joined: 26 Nov 2009 Location: Reading, Pa Online Status: Offline Posts: 3990 |
Posted: 17 Jun 2013 at 3:32pm |
I saw no change in mpg after installing the risers. We tend to go to one state park more than others and did all kinds of playing for improved mpg and only found that the position on our kayaks on the roof seemed to help (v shaped)
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hogone
Senior Member Joined: 09 Apr 2013 Location: St. Louis Online Status: Offline Posts: 1042 |
Posted: 17 Jun 2013 at 4:49pm |
Just a thought here. Everyone agrees (so it seems including myself) that MPG seems to fall in about half (maybe not quite half but close) when pulling the pod. I wonder if it would be worth the investment to attach an air deflector on the TV to shoot the resistance up and over the pod. I'm not even sure if those deflectors (hope everyone knows what I mean by that) even really work or make much of a difference, just a fleeting thought..
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Jon & Pam
2013 RP177 2010 F150 2017 HD Streetglide 2009 HD Lowrider CHEESEHEAD |
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Seanl
Senior Member Joined: 19 Sep 2011 Location: Fredericton NB Online Status: Offline Posts: 633 |
Posted: 17 Jun 2013 at 5:04pm |
I have wondered the same myself. I think it would have to be V shaped though because the TV ls narrower that the trailer.
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Sean, 2011 Rpod RP-173,2009 Jeep Liberty Rocky Mountain Edition
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Goose
Senior Member Joined: 24 Sep 2010 Location: Arizona Online Status: Offline Posts: 672 |
Posted: 17 Jun 2013 at 5:23pm |
On a tractor/trailer the airshield on the cab roof and the fairings on the side of the cab do work very well if they are 18 inches from the trailer but not over 30 inches, after that they start to loose their effectiveness. The same holds true with a TV and the POD, you really need a set of fairings that extend a little ways from the back of your TV to start to see any improvement in MPG. Those that have put kayaks on the roof of their TV's have reported better MPG as the kayaks are much like the airshield on a big rig.
I would not think that risers would have much a difference in MPG. Putting flexible side skirts on your TV and the POD may help some, just like on the race cars. Goose |
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Mother Goose's Caboose..2011 RP171..07 Grand Cherokee
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techntrek
Admin Group - pHp Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9059 |
Posted: 17 Jun 2013 at 7:26pm |
We, too, had our pod for a while before we got the risers, and didn't notice any difference. Discussions with computer modeling in the past showed air flow problems across the curved rear, counter-intuitively. I think the problem with the pod is less pressure on the front and more suction on the rear. |
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Doug ~ '10 171 (2009-2015) ~ 2008 Salem ~ Pod instruction manual
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Keith-N-Dar
podders Helping podders - pHp Joined: 03 Apr 2011 Location: Mayville, WI Online Status: Offline Posts: 1447 |
Posted: 17 Jun 2013 at 7:40pm |
I got the best mileage ever on the last trip and it was the first since putting on the risers. The only thing that helps is keeping the speed to about 55-60. I loose 5MPG (20 to 15). If I go 70-75 I loose half (20-10).
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Keith-N-Dar
Boris & Betty (Boston Terriers) 2011 R-Pod 177 2010 Ford F-150 |
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