gas saving tips?
Registered User
Joined: Sep 2006
Posts: 2,330
Likes: 0
Originally Posted by Elistan,Jun 25 2008, 04:22 PM
Not true about the acceleration thing - small throttle openings present a huge airflow restriction, making the engine work much harder than it would otherwise just to draw in air.
You're right about the slowing down part, though - using the brakes turns a portion of your kinetic energy into heat, and you need to combust more gas to get back up to speed. On the other hand if you can maintain a constant velocity, your only fuel expenditure is to overcome the normal frictions of everyday driving which you have to contend with anyway, rather than worry about overcoming your car's inertia. (That's why traveling at 70mph on the Interstate uses much less gas per mile than driving in the city with all its traffic lights and such.)
You're right about the slowing down part, though - using the brakes turns a portion of your kinetic energy into heat, and you need to combust more gas to get back up to speed. On the other hand if you can maintain a constant velocity, your only fuel expenditure is to overcome the normal frictions of everyday driving which you have to contend with anyway, rather than worry about overcoming your car's inertia. (That's why traveling at 70mph on the Interstate uses much less gas per mile than driving in the city with all its traffic lights and such.)
.. small throttle openings restricts air- true. less air also means less fuel..
Joined: Dec 2005
Posts: 2,092
Likes: 0
From: Yonkers, NY
here is what i did this week to help my gas consumption but looks as well hehe:
removed the cat and replaced with a testpipe
removed spare tire
removed back of trunk liner (the entire piece covering the spare and gas fillr tube)
removed oem rear strutbar and replaced it with a cusco one
a good estimate of the weight saved i'd say: 50 - 65 lbs
removed the cat and replaced with a testpipe
removed spare tire
removed back of trunk liner (the entire piece covering the spare and gas fillr tube)
removed oem rear strutbar and replaced it with a cusco one
a good estimate of the weight saved i'd say: 50 - 65 lbs
Registered User
Joined: May 2005
Posts: 5,252
Likes: 1
From: Hong Kong
Originally Posted by R3DS2K,Jun 27 2008, 11:34 PM
so your telling me that if i go WOT the pcm/ecm wont dump in more gas .. small throttle openings restricts air- true. less air also means less fuel..
.. small throttle openings restricts air- true. less air also means less fuel..
Joined: May 2008
Posts: 867
Likes: 1
Originally Posted by roflitzjinno,Jun 25 2008, 06:42 PM
took the bus all through out highschool. so no thanks :] but i like the offer.
thought about a fit but all i wouldve done was swap a k motor. so no thanks.
3.5k is what ive been shifting at lately. well see how that works out. i know im getting what i should be getting for city but id like to see what i can really get. large throttle openings? what does that mean?
and i havent even hit vtec so yeah... im good on that.
thought about a fit but all i wouldve done was swap a k motor. so no thanks.
3.5k is what ive been shifting at lately. well see how that works out. i know im getting what i should be getting for city but id like to see what i can really get. large throttle openings? what does that mean?
and i havent even hit vtec so yeah... im good on that.
Well, that's the same as me. However, I got almost 26 MPG on my last (and only
) fill-up. It was top-down about 95% of the time and the other 5% of the time, the A/C was on. I cruise at around 75 MPH on the highway. I also give it gas to rev-match or heel-toe on downshift. I'm not heavy on the throttle nor am I overly light on it, either.I would also say that about 80% of that fill-up was on the highway. So, I'm not sure what our difference is, except maybe that I have more highway miles, different driving habits, or that only 1 fill-up doesn't give an entirely accurate estimate.
Registered User
Joined: Sep 2006
Posts: 2,330
Likes: 0
Originally Posted by midnightmethane,Jun 28 2008, 05:32 AM
here is what i did this week to help my gas consumption but looks as well hehe:
removed the cat and replaced with a testpipe
removed spare tire
removed back of trunk liner (the entire piece covering the spare and gas fillr tube)
removed oem rear strutbar and replaced it with a cusco one
a good estimate of the weight saved i'd say: 50 - 65 lbs
removed the cat and replaced with a testpipe
removed spare tire
removed back of trunk liner (the entire piece covering the spare and gas fillr tube)
removed oem rear strutbar and replaced it with a cusco one
a good estimate of the weight saved i'd say: 50 - 65 lbs
also you can remove your pass. seat
Community Organizer
Joined: Sep 2007
Posts: 10,599
Likes: 79
From: The 604
Some good tips! 
Do you really use less gas when the car is in gear and coasting vs being in Neutral and coasting? The former is definitely safer! What about when you are stopped at a light in gear or in neutral? Does it make a difference?
Do you really use less gas when the car is in gear and coasting vs being in Neutral and coasting? The former is definitely safer! What about when you are stopped at a light in gear or in neutral? Does it make a difference?
Registered User
Joined: Sep 2007
Posts: 5
Likes: 0
From: Carson City, NV
Originally Posted by GT_NFR,Jun 25 2008, 03:36 PM
Driving the car in too tall of a gear won't save gas....if you're out of the power band you're not making efficient use of the engine thus reducing your gas mileage.
The engine may not be at its peak power level, but peak power equals peak fuel usage. A fuel dragster uses several gallons of fuel in a quarter mile. They are at their absolute peak power the entire time.
Registered User
Joined: Sep 2006
Posts: 2,330
Likes: 0
Originally Posted by alSpeed2k,Jun 28 2008, 10:35 AM
Some good tips!
Do you really use less gas when the car is in gear and coasting vs being in Neutral and coasting? The former is definitely safer! What about when you are stopped at a light in gear or in neutral? Does it make a difference?
Do you really use less gas when the car is in gear and coasting vs being in Neutral and coasting? The former is definitely safer! What about when you are stopped at a light in gear or in neutral? Does it make a difference?
at a light.. im in N .. it doesnt make a difference but why hold the clutch down lol
Joined: Nov 2007
Posts: 5,100
Likes: 6
From: Maggie Valley, NC