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2nd Generation GE8 Specific ECO-Fit Discussion Sub-Forum Threads discussing the pursuit of ultimate economy, hypermiling techniques & maximizing your MPG for the 2nd generation GE8 Honda Fit

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Old 11-05-2009, 11:50 AM
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Does the Spoiler help or hurt gas mileage?

Has anyone tested this? I have been searching around to find out if the Fit's spoiler does anything to help or hurt mpg. Other car forums seem pretty inconclusive. I can't tell if the airflow over the spoiler would benefit this car for mileage or not. I'm definitely not worried about lift on this car with my driving.
Just curious.
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Old 11-05-2009, 12:04 PM
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ELGE8 is an unknown quantity at this point
I can assure you that with the speeds that the Fit is capable of the spoiler doesn't really help by creating downforce as they are intended. As for gas mileage i'm sure it doesn't help or hurt it. The spoiler is there for purely aesthetic reasons.
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Old 11-05-2009, 12:10 PM
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Because the Sport weighs more than the base model by something like 100 pounds, it does get slightly worse fuel economy. But who cares, I like how the sport looks!
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Old 11-05-2009, 12:22 PM
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I really like the look of it to. I was actually thinking about the new JDP spoiler.
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Old 11-05-2009, 12:43 PM
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Like was already said the added weight could hurt mileage, but I doubt 100lbs makes a difference at all. Also since a rear spoiler is technically intended to create downforce and keep the rear wheels on the ground and considering the Fit is front wheel drive it's a good thing the spoiler is there only for looks. :/
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Old 11-05-2009, 12:49 PM
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ELGE8 is an unknown quantity at this point
Just because a car is front wheel drive it does not mean that it wouldn't benefit from downforce...that is a misconception. Whether a car is front or rear wheel drive when you press on the gas inertia causes the rear of the car to squat. That is why you are never supposed to let off of the gas when powering through a turn or the rear of the car will lift up causing you to spin out.
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Old 11-05-2009, 03:06 PM
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Quote:
Originally Posted by ELGE8 View Post
Just because a car is front wheel drive it does not mean that it wouldn't benefit from downforce...that is a misconception. Whether a car is front or rear wheel drive when you press on the gas inertia causes the rear of the car to squat. That is why you are never supposed to let off of the gas when powering through a turn or the rear of the car will lift up causing you to spin out.
But back to the question - very safe to say neither.
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Old 11-05-2009, 04:09 PM
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Quote:
Originally Posted by ELGE8 View Post
Just because a car is front wheel drive it does not mean that it wouldn't benefit from downforce...that is a misconception. Whether a car is front or rear wheel drive when you press on the gas inertia causes the rear of the car to squat. That is why you are never supposed to let off of the gas when powering through a turn or the rear of the car will lift up causing you to spin out.
good point but 1 out of several thousand Fit owners will ever drive their car that way. especially the ones concerned about MPG.
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Old 11-05-2009, 10:55 PM
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Just because it is a spoiler, down force is NOT a given. That is done with the ANGLE of the spoiler and ours is angled slightly down, not up which would give you down force. The Fit does go fast enough for angled spoilers to work though, stick your arm out the window at 60 and change the angle of your hand,

MPG?????? Maybe yes

1. it follows the slope of the curving down roof line so it should not add drag

2. it forces delay in the wake vacuum and that is often a good thing for MPG
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Old 11-20-2009, 06:02 PM
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IMO the spoiler probably helps control the shape/flow of the wake, and has a possibility to increase mpg since it is pretty flush with the vehicle and follows the same contours of the body. Plus its not responsible for the whole 100lbs of added weight to the Sport model, maybe 10lbs?
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Old 11-20-2009, 07:55 PM
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I suspect that the rear spoiler has no impact on gas mileage, but may help keep the rear window cleaner. Mostly, I think it's just for looks; different people prefer with/without the spoiler. You pays your money and makes your choice. The spoiler is only one part of the "Sport" package (too bad it doesn't include a DOHC engine with more power).
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