100+ hypermiling / ecodriving tips & tactics

[PaleMelanesian]

If the extended glide puts you in a higher elevation parking spot, you might actually come out ahead on the return trip as well. That's what I have at work. If I milk the glide to the very top of the lot, I can leave using no gas until the light a block away. It's an extended glide plus potential parking.

[PaleMelanesian]

Originally Posted by TOOQIKK

what about adding a header, cat back exhaust, cai, sri, upgraded air filter, es motor mounts(or full master kit), short shifters, free flow mufflers?

no, no, no, no, no, no, no, no. sorry. Louder and possibly faster, yes, but not more efficient.

Oh, and it'll definitely be furiouser.

[Christ]

Originally Posted by PaleMelanesian

If the extended glide puts you in a higher elevation parking spot, you might actually come out ahead on the return trip as well. That's what I have at work. If I milk the glide to the very top of the lot, I can leave using no gas until the light a block away. It's an extended glide plus potential parking.

I think rather than an "in-general" approach, most o of us tend to take advantage of the situation at hand when we can. However, most generally, I just stop at whatever slot is closest to either me, or the exit.

[Kodak]

Originally Posted by PaleMelanesian

If the extended glide puts you in a higher elevation parking spot, you might actually come out ahead on the return trip as well. That's what I have at work. If I milk the glide to the very top of the lot, I can leave using no gas until the light a block away. It's an extended glide plus potential parking.

Ah.

Yeah you're right, the terrain definitely matters here. If you can attain enough potential energy to offset the pulse, then there' s a net fuel savings.

[TOOQIKK]

Originally Posted by PaleMelanesian

no, no, no, no, no, no, no, no. sorry. Louder and possibly faster, yes, but not more efficient.

Oh, and it'll definitely be furiouser.

gonna have to call you out of this one.

by making the engine breath easier you make it more efficient. louder yes but more efficient. it will take less gas and less throttle to reach speed and run more efficiently. as long as you dont stick your foot in it to take off...lol but its fun to some times.....try running around your block but only being able to breath through a straw .....and then do it with out the straw and breath normally. the same is for a stock intake, exhaust....it runs but if you let it really breath it really runs!

[MetroMPG]

The counter-argument is: the RPM at which you run an engine when driving for maximum efficiency are low enough that there isn't a significant restriction in the intake or exhaust to be fixed by changing out those bits. Plumbing mods have their biggest impacts at high flow rates (ie. high RPM).

But again: why are we talking about mods in the driving technique thread??? Starting a new topic, or posting in an existing one would be best.

[endurance]

Originally Posted by TOOQIKK

gonna have to call you out of this one.

by making the engine breath easier you make it more efficient. louder yes but more efficient. it will take less gas and less throttle to reach speed and run more efficiently. as long as you dont stick your foot in it to take off...lol but its fun to some times.....try running around your block but only being able to breath through a straw .....and then do it with out the straw and breath normally. the same is for a stock intake, exhaust....it runs but if you let it really breath it really runs!

By moving more air, you're also moving more fuel. As for your straw analogy, who would burn more calories, the guy walking around the block because he can't take in enough oxygen to run or the guy running because his airway is unrestricted?

I have an RSX-s for gawd's sake and I can tell you without a doubt, it burns gas very efficiently at wide open throttle. Since my goal isn't to burn gas anymore, it is to save gas, I rarely see wide open throttle anymore... and I'm getting 38mpg during the winter and 41 during the warmer weather.

[PaleMelanesian]

Originally Posted by TOOQIKK

gonna have to call you out of this one.

by making the engine breath easier you make it more efficient. louder yes but more efficient. it will take less gas and less throttle to reach speed and run more efficiently. as long as you dont stick your foot in it to take off...lol but its fun to some times.....try running around your block but only being able to breath through a straw .....and then do it with out the straw and breath normally. the same is for a stock intake, exhaust....it runs but if you let it really breath it really runs!

Bold emphasis mine. By letting up on the throttle, you're adding back as much restriction as the new intake removed. If you didn't, the car would end up going faster. So you let up even more. End result - same as before.

Sure, a stock intake may be restrictive at WOT and high rpm, but we're not running at those levels. My car has a 7000 rpm redline. I usually run it below 2000 rpm. Even if I'm at WOT, which I'm not, that's only 28% of the maximum potential airflow. Adding a little to the maximum won't do much at all in the normal operating range.

[comptiger5000]

The exhaust can help, if it's tuned correctly for lower rpm operation. However, except at WOT, the intake won't make a difference, as you'll just open the throttle less.

[Wayneburg]

I'd like to add one more to the list of tips again.

Roll your powered windows up before parking the car. It wastes fuel when you park the car and then you have to keep the car running to roll the windows up. Yes, you could turn off the engine and use the battery to roll up the window, but that electricity is generated by the engine to begin with.