How much gas just to run the stereo?

[alxmlr789 10+ year member]

holy sheet.... im gonna start tellin people I have a 3 HP audio system

You know any idiot would believe it. "Wow, i didn't know they could be that powerful :crazy:"

lol.

 

[audioholic 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif
My post was not serious at all hence the gremlin reference, just wanted a better explanation from the OP and for my rebutle to you, YOU being a smart-*** asked if I thought a car ran off magic. So tell me how would you reply to some d!ck being a smartass to you in a thread

and Im the cocky one

Me mentioning 'magic' in reply to your gremlins comment makes ME the smart ***? I have to ask... what's the color of the sky in your little world you live in? Is it blue like ours?
And arguing the petty side of your reply, while ignoring that you were completely wrong factually, will not save you any face here. If you are really interested in saving face, just man up and admit you were wrong and shouldn't have replied the way you did. Sometimes respect is earned not from always being correct, but from admitting when you are not. Or... will you be the whiney little guy that doesn't know when to quit? Choice is yours bud, lets see which one you chose.

 

[terra 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/ready2go.gif.6557fa3d88b9eaca9c7b8efb9cbd02ed.gif//content.invisioncic.com/y282845/emoticons/popcorn.gif.32dd9e22fd77e77bc3c907062768fcd2.gif

 

[Supergumby5000 5,000+ posts]

i didnt read through the last three pages, but the first page gave me a good belly chuckle

CA.com > all

 

[dman4486 5,000+ posts]

i didnt read through the last three pages, but the first page gave me a good belly chuckle
CA.com > all

this last page between holic and pooty is better than the first

 

[tarzan1930]

lol at OP but on a more realisitc note. Im going to have just under a 1000lbs in the back of my 4runner and its already sagging like a *****. Anyone guess how much that will hurt my gas mileage?

Depends on the tires and road surface.

Running on concrete is about twice as efficient as running on asphalt.

On asphalt, 1000lbs more weight (about 500 kg) probably needs an additional force of about 150 N for rolling.

So for every mile, you need about an extra 240,000 Joules of energy. At 60 mph, that's a mile per minute. And that means 4,000 watts more power, or 5.36 hp.

If you need about 40hp to stay at 60 mph, then that extra 5.36 hp means you'll need more than 10% more gas for the trip.

But again, depends on tires and road surface. Underinflated tires makes things worse.

YMMV.

 

[dman4486 5,000+ posts]

Running on concrete is about twice as efficient as running on asphalt.

YMMV.

any proof or references,

I have noticed a difference concrete vs asphalt, but don't believe it is double

 

[Mitch86 5,000+ posts]

Didnt Mythbusters disprove the theory that running the AC uses extra gas? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Anyway, how would you be using more gas just because of an audio system? Yes it is more strain on the electrical system..but in theory, your car is generating the electricity either way.(system or no system) Your car doesnt magically make up for the added strain by creating more electricity. This doesnt make sense. . .

 

[audioholic 5,000+ posts]

Didnt Mythbusters disprove the theory that running the AC uses extra gas? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
Anyway, how would you be using more gas just because of an audio system? Yes it is more strain on the electrical system..but in theory, your car is generating the electricity either way.(system or no system) Your car doesnt magically make up for the added strain by creating more electricity. This doesnt make sense. . .

The more current the alternator produces, the more drag it creates on the engine. If you have a 200 amp alt, but its only being required to provide 100 amps, it will display half as much resistance to the engine as it would when producing 200 amps.
The engine isn't generating the electricity anyway, it does it only when necessary.

 

[BobbyDD 10+ year member]

This thread is actually quiet interesting and informative.

 

[1991Brougham 10+ year member]

Didnt Mythbusters disprove the theory that running the AC uses extra gas? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

All I know is what my personal experiences with cars are. Your mileage may vary

Rick

 

[terra 5,000+ posts]

no mythbusters proved that driving with your windows down is more efficient that using ac.

 

[Mitch86 5,000+ posts]

no mythbusters proved that driving with your windows down is more efficient that using ac.

This is the one I was thinking about...but I thought they both got about the same MPG..?

 

[audioholic 5,000+ posts]

"Windows down vs. air conditioning

 

"Urban puzzle": it is more efficient, on a hot day, to run with the A/C on and windows up than to run with windows down (b/c of increasing car's drag).

 

Computer-based mpg measurements: * 11.7/11.8 with A/C on and windows up * 11.7/11.8 with A/C off and windows up * 11.3 with A/C off and windows down

 

So, according to the computer, it's better to use A/C with windows up.

 

This was too quick and easy for TV, so they decided to stage a seven hour marathon, race-til-you're-empty duel, with Jamie driving an SUV with A/C on and Adam driving an SUV with windows down. Though, once the safety inspector intervened, it was no longer a seven-hour marathon, it was a bit slower (45mph instead of 55mph), and a lot shorter (only 5 gallons each).

 

Jamie's A/C car ran out of gas first -- Adam's windows down SUV ran for another 30 laps -- completely contradicting the computer mpg estimate. Computer estimate based on air flow into the engine, so it would appear that it is unable to properly model the difference between A/C and windows down.

 

Mythbusted"

http://kwc.org/mythbusters/2004/11/mythbusters_boom_lift_catapult.html

 

[tarzan1930]

any proof or references, I have noticed a difference concrete vs asphalt, but don't believe it is double

Well, the doubling is is only for the energy needed for rolling -- not the total energy needed to overcome the other things that sap energy, like aerodynamic drag.

If you want details, take a look here:

http://en.wikipedia.org/wiki/Rolling_resistance

One thing that might help asphalt a bit, though, is the lower density of the heated air directly above it. And that means less drag. Concrete stays a little cooler in the sun and so we can expect the air above it to be cooler and therefore denser, creating more drag.