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CNN: Hypermiling Heard of it?

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Old Jun 1, 2008 | 01:25 AM
  #1  
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CNN: Hypermiling Heard of it?

http://www.hypermiling.com/

I just saw this, weird. looks fun.
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Old Jun 1, 2008 | 08:06 AM
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Re: CNN: Hypermiling Heard of it?

just seems like common sense driving practices to me
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Old Jun 1, 2008 | 10:13 AM
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Re: CNN: Hypermiling Heard of it?

turning the car off? sometimes the bird stalls while im on the clutch coasting, never thought to do it on purpose, maybe i don't understand all of it?

cornering without brakes... i like, take both sides of the road and take the racing line. bird wants to break free, aerio sticks like glue but has a bit of body roll.
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Old Jun 1, 2008 | 12:17 PM
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Re: CNN: Hypermiling Heard of it?

I'm surprised more of these guys haven't careened off the road and died in fiery crashes. A good deal of what they do is plain idiocracy. Some of what they do is common sense, but they take it to dangerous extremes.

Why not take the time and few bucks and buy low rolling resistance tires instead of overinflating them? Can't they pick up and install a vacuum gauge? 55MPH is not where you get the best fuel econ, that depends on car itself.
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Old Jun 1, 2008 | 04:22 PM
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Re: CNN: Hypermiling Heard of it?

Originally Posted by tekkitan
just seems like common sense driving practices to me
I've used all of the techniques (except for neutral and engine shutoff) on a daily basis for years. None of this is new. Don't forget that some of the younger generation have never thought about gas consumption with respect to driving habits. They don't know that the more you use your brakes, the more gas you use.
When you're pushing a 7500 lb vehicle with a 6.0L motor thru traffic you get conscious really quick of braking always equals speeding back up= fuel.
If I'm really rushed I get 2 days on a $90 tankfull. If things are normal, I get 3 days. Thank goodness my employer picks up the tab.
You also have to face facts. When you get on a 35 mph onramp and have to merge with 75+mph traffic, you have to put the stick to it.
In conclusion: Drive as goofy as you want. Just stay the %$&# out of the left lane.
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Old Jun 1, 2008 | 07:16 PM
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Re: CNN: Hypermiling Heard of it?

how do you determine the rolling resistance of tires? I just bought a set of tires, by price, and ratings "tread, trac, temp and speed" never saw anything about resistance, biggest concern was performance overall in weather conditions and such. I won't buy low rated tires. I use tirerack.com so if anyone can help me find the resistance ratings.

Also, is it true, lower the rpm's the less fuel consumed "leaving out little intricate engine\tuning details" And, If I am driving, and fully depress the clutch petal "knowing that it is properly set and fully engaging" does this burn my clutch up, if riding that way for any extended time "say a bunch of steep hills, or just crusing along?" Around here, we have a few slow slopes that are a good distance of just straight driving, no lights. talking about a 40sec to a minute at 40mph. so Curious.

Edit:
also, fuel economy is not a concern when pulling onto a NJ highway, getting up to 65-70+mph as soon as possible is. and the left lane is for cops to fish in"everyone excessivly speeds over there" keep in the right, middle lane at speed limit will get you passed on both sides.

Last edited by fallenleader; Jun 1, 2008 at 07:19 PM. Reason: adding info
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Old Jun 1, 2008 | 07:56 PM
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Re: CNN: Hypermiling Heard of it?

Originally Posted by fallenleader
... If I am driving, and fully depress the clutch petal "knowing that it is properly set and fully engaging" does this burn my clutch up, if riding that way for any extended time "say a bunch of steep hills, or just crusing along?" Around here, we have a few slow slopes that are a good distance of just straight driving, no lights. talking about a 40sec to a minute at 40mph. so Curious...
Just knock it into neutral. Truck drivers call it "Georgia overdrive". Years ago big trucks wouldn't go above 75 mph downhill because the diesel engine would be at redline and fuel would be cut off. So they would just knock it in neutral and "let 'er eat". The reason it's illegal in many states is trucks going downhill at 95 mph in neutral are subject to brake fade and it is impossible to get them back into gear at that speed.
You can see why some disappeared over the horizon.
Your 5-speed won't have any problem going back in gear. Holding the clutch down for long periods of time will wear the throw-out bearing, not the clutch.
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Old Jun 1, 2008 | 08:03 PM
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Re: CNN: Hypermiling Heard of it?

Originally Posted by tekkitan
just seems like common sense driving practices to me
That is exactly what I said to my wife when she said something to me. It pissed her off. Which I honestly didn't mean to do.

It's amazing someone can take a common sense thing like that, put a new fancy name on it, and the man is a genius.
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Old Jun 1, 2008 | 08:27 PM
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Re: CNN: Hypermiling Heard of it?

Originally Posted by LilJayV10
That is exactly what I said to my wife when she said something to me. It pissed her off. Which I honestly didn't mean to do...
Hence the reason everybody has 2 cars...
Originally Posted by fallenleader
how do you determine the rolling resistance of tires? I just bought a set of tires, by price, and ratings "tread, trac, temp and speed" never saw anything about resistance, biggest concern was performance overall in weather conditions and such. I won't buy low rated tires...
Hard compound tires last a long time and have worse traction, but lower rolling resistance. Soft compound tires, higher rolling resistance, better traction.
Aggressive tread has better traction but higher rolling resistance. Simple tread is the opposite.
Cheap tires are usually soft compound with excellent traction and are great for drag racing (like mine).
So, the lowest rolling resistance will be found in high treadwear (hard compound) tires with simple tread design that have the worst traction.
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Old Jun 1, 2008 | 10:09 PM
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Re: CNN: Hypermiling Heard of it?

I just got sumitomo HTR+'s for the woman's aerio. here is a link.
http://www.tirerack.com/tires/tires....nSpeedRating=S
best I could get in the price range.

Rated: Treadwear: 400
Traction: AA
Temperature: A
Speed: V

Firebird's got 215/65/15's aluminum "turbo?" rims from the 87' and in the front it has 215/70/14 steel's "don't ask, its what I had, buying rims eventually" tires in the under 100$ price range, for those wheel sizes, are around
400+ tread
A traction
A temp
and in the speed range of R to H "depending on which rim size"
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