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03-17-2009, 09:08 AM | #1 |
Drives: 09 Yaris 3 Dr White LB Join Date: Mar 2009
Location: PA
Posts: 432
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09 LB Rear seat removal for better MPG
I have an 09 3 door LB. I would like to pull the rear seats, my guess is this would help MPG. Are there airbags in the rear seats? Will this be a problem if I pull them?
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03-17-2009, 09:42 AM | #2 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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weight removal of any kind always helps with mileage and performance
No airbags at all, they're just plain old seats... here's a great DIY from way back: http://www.yarisworld.com/forums/showthread.php?t=306
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The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ... |
03-19-2009, 11:46 AM | #3 |
╚══════════RN
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If you do this, I'd like to see some data. Are you monitoring your fuel economy now? If you get a solid few weeks down then remove your rear seats and compare, I'd say that would be pretty definitive.
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42.88 |
03-19-2009, 11:58 AM | #4 |
Drives: 09 Yaris 3 Dr White LB Join Date: Mar 2009
Location: PA
Posts: 432
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I am still in breakin and am ragging on it to seat the rings. One post I saw here showed a 4 mpg increase by removing the rear seat and spare.
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03-19-2009, 12:15 PM | #5 |
╚══════════RN
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FWIW, most of what I've read says that the rings seat within the first few miles of driving.
And I'd be really skeptical of such a claim. In general, the rule of thumb on weight is something like 1MPG per 100lbs. The seats don't weigh enough. They were probably using some hypermiling techniques in addition to seat removal. Unless I saw data showing a constant 4MPG jump, I call shenanigans.
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03-19-2009, 12:18 PM | #6 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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well there's so many variables to mileage, it is really almost impossible to pinpoint an improvement to a single modification...
but it is universally known that weight reduction of any kind is always beneficial to performance and fuel consumption
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The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ... |
03-19-2009, 12:23 PM | #7 |
╚══════════RN
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...I shaved my beard.
*runs away*
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03-19-2009, 12:25 PM | #8 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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that's gotta be worth at least 0.001MPG!
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The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ... |
03-19-2009, 12:30 PM | #9 |
Drives: 2014 yaris 5 speed Join Date: Aug 2006
Location: michigan
Posts: 642
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03-19-2009, 12:35 PM | #10 |
Drives: Blazing blue 08 LB Join Date: Oct 2008
Location: Near St.Louis
Posts: 66
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If you do most of your driving on the highway or rural driving the extra weight may not make a very big difference. If most your driving is stop and go city the extra weight being removed will make more of a difference because you will be moving the 100 lbs from a stop a lot more, once moving the weight plays less of a roll in MPG.
Last edited by Mateo; 03-19-2009 at 01:17 PM. |
03-19-2009, 12:37 PM | #11 | |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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Quote:
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The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ... |
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03-19-2009, 12:49 PM | #12 | |
Drives: 09 Yaris 3 Dr White LB Join Date: Mar 2009
Location: PA
Posts: 432
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Quote:
When I added a 80 lb subwoofer to my civic I lost 3 mph, I have a hilly commute. As far as the rings, the old timers always said to do a lot of accelerations the first 1000 miles. I know ring composition is different now, but compression plays such an important role in efficiency that I can't see risking not following the tried and true methods. I'd go as far as to say that the huge variance people report on Yaris MPG is compression differences, very few people actually break in engines the old way. |
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03-19-2009, 01:13 PM | #13 |
╚══════════RN
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Well, I hope you've been keeping detailed information on your MPG then. I don't buy it unless I see the data to prove it.
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03-19-2009, 08:03 PM | #14 |
Yaris Hypermiler
Drives: 2007 Silver Liftback Join Date: Aug 2006
Location: Perkasie PA USA
Posts: 102
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weight of the seat?
After you remove the rear seat, please weigh it. I would be interested. Also, let us know how much work was involved, like amount of time it took.
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03-19-2009, 08:22 PM | #15 |
Took me about 30 minutes to remove my 60/40 split. I am pretty sure there is a weight posted somewhere on the forums and I think it's around 100lbs if you include the seat belt stuff.
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03-19-2009, 08:24 PM | #16 |
Audio Junky
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When I gutted my 08 LB for sound dampening all passenger seats out I instantly saw a 3mpg gain.... I wonder if all of it is from those seats however... I would imagine you might get 1mpg gain... MAYBE 2 from taking out the rear seats.
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03-20-2009, 10:22 AM | #17 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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well for what it's worth i took out mine for a while, then needed to carry people so I put the bottom back on, then the back section, over a period of a few months, but I can't say I've seen any noticeable mileage difference. definitely felt more dynamic going around fast bends though, almost too light at the back
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