How much gas just to run the stereo?

[dman4486 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

//content.invisioncic.com/y282845/emoticons/thumbsupwink.gif.129404938effda6ad9cca39e7f4b58a3.gif

 

[Mitch86 5,000+ posts]

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.

Ok so if I have my car reved to 2k rpm and my alt is putting out 150amps, I then blast my system creating current draw...the alt doesnt turn faster to make up for the draw, correct? So in theory, the "drag" is already there. Maybe I'm just looking at it all wrong...

 

[Mitch86 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

I guess I was wrong...Thanks for clearing that up. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[audioholic 5,000+ posts]

Ok so if I have my car reved to 2k rpm and my alt is putting out 150amps, I then blast my system creating current draw...the alt doesnt turn faster to make up for the draw, correct? So in theory, the "drag" is already there. Maybe I'm just looking at it all wrong...

You are looking at it wrong. Why would your alt be putting out 150 amps BEFORE you turn up your stereo? And even if it was, when you turn up the stereo is ADDS to the current draw, necessetating that the alt produce more power and exhibit more drag on the engine.
If you mean your alt is 150 amp so you think it always produces 150 amps, or always does when you rev the engine.... read my previous reply again.

I guess I was wrong...Thanks for clearing that up. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

No problemo. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[terra 5,000+ posts]

i just dont pay attention to gas...if i thought of everything in my car thats cutting down my mileage i would be depressed!

 

[audioholic 5,000+ posts]

Gas mileage, yet another good reason not to date fat girls.

 

[tarzan1930]

"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

I think the slower speed made a big difference.

Windows open at 45mph isn't going to take as much energy as windows open at 55 mph. And the efficiency of the condencer in the A/C is lower at 45mph than at 55mph.

But the biggest problem, especially if you live in a place like Florida, is that, unlike runnning the A/C, rolling down the windows isn't going to lower the humidity in driver's compartment.

 

[terra 5,000+ posts]

Gas mileage, yet another good reason not to date fat girls.

x2. or if you do, ask them to walk to dinner.

 

[audioholic 5,000+ posts]

x2. or if you do, ask them to walk to dinner.

And to buy their own.

 

[dman4486 5,000+ posts]

Gas mileage, yet another good reason not to date fat girls.

x2. or if you do, ask them to walk to dinner.

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif:laugh:

 

[Mitch86 5,000+ posts]

You are looking at it wrong. Why would your alt be putting out 150 amps BEFORE you turn up your stereo? And even if it was, when you turn up the stereo is ADDS to the current draw, necessetating that the alt produce more power and exhibit more drag on the engine.
If you mean your alt is 150 amp so you think it always produces 150 amps, or always does when you rev the engine.... read my previous reply again.

No problemo. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I always thought the alt produced it's rated power at rated rpm no matter if there was an additional load or not...then the cars components only draw the amount of power they need, and so on and so forth... That's why I say if it were putting out 150 amps and then blasted the stereo it wouldnt be creating more drag because there is no need for it to make power for the new load being presented. Ah well, you learn something new every day. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[terra 5,000+ posts]

And to buy their own.

lets just take it a step further and say go to a different restaraunt too. and dont come home afterwards.

 

[dman4486 5,000+ posts]

lets just take it a step further and say go to a different restaraunt too. and dont come home afterwards.

or further than that....don't live w/ her in the first place

 

[terra 5,000+ posts]

or further than that....don't live w/ her in the first place

i think i can wrap this allll up with 1 statement. dont talk to fatties.

 

[dman4486 5,000+ posts]

i think i can wrap this allll up with 1 statement. dont talk to fatties.

I talk to them, but don't date/(insert word here) them