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December 11th, 2008, 04:15 PM
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#1 |
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Regular
2003 Mustang V6
Join Date: Nov 2008
Location: Zeeland, Michigan
Posts: 176
 iTrader: 0 reviews
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HP in relation to MPG
Why is it that most mods that you can do to an engine that result in increased horsepower will help your fuel economy but a larger engine producing more HP because of displacement will get worse fuel mileage.
Does it have something to do with how efficiently the engine is using the fuel? Can someone please explain? |
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December 11th, 2008, 04:28 PM
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#2 |
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Banned
2008 GCSRT8, 1965 Coupe;
Join Date: Sep 2008
Posts: 318
iTrader: 0 reviews
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uhh... it takes more fuel to keep 8 pistons moving then 6... and gas mileage isnt always increased... look at cams...
honestly increasing displacement doesnt increase power a huge amount... it is more the RPM band and FI... 3.8-4.2 about 30 horse and 4.6-5.0 about the same... it just gives you more potential thats all... |
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December 11th, 2008, 04:35 PM
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#3 |
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MM's Resident Ricer
2006 Scion tC
13.001@113
Join Date: Nov 2006
Location: Raleigh/Lenoir, NC
Posts: 9,880
Blog Entries: 2
iTrader: 1 reviews
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uhh most HP will not increase fuel miliage ever if something says it does both its lieing. except maybe a small low low boost turbo but ione tuned for fuel miliage isnt giving that much power. Engines make power by burning fuel and air, add more fuel and air in even intervals so that all the oxygen is used up by the combustion you make more power to make power you need more fuel therefore you not gonna get gas miliage
__________________
 Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby |
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December 11th, 2008, 04:41 PM
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#4 |
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Regular
2003 Mustang V6
Join Date: Nov 2008
Location: Zeeland, Michigan
Posts: 176
iTrader: 0 reviews
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does everyone need to start their post with uhhhhh? lol
I was just curious, some things just dont make sense to me. Like how does a turbo create more power if it is creating more backpressure at the same time. Where is the tradeoff? |
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December 11th, 2008, 04:43 PM
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#5 | |
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Banned
2008 GCSRT8, 1965 Coupe;
Join Date: Sep 2008
Posts: 318
iTrader: 0 reviews
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1. intake 2. exhaust 3. computer 4. alum ds 5. alum flywheel so it is about making it more efficient thats where you get both... |
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December 11th, 2008, 04:48 PM
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#6 | |
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Regular
2003 Mustang V6
Join Date: Nov 2008
Location: Zeeland, Michigan
Posts: 176
iTrader: 0 reviews
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If the v6 and v8 were both 100% efficient they only difference in fuel mileage should be the added weight from the V8 right? sure it uses more fuel with 8 cyliders but it also creates more power. Last edited by a_kraker99; December 11th, 2008 at 04:50 PM. |
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December 31st, 2008, 07:20 PM
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#7 | |
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MM Ninjas!
 
1990 Mustang LX
9.36@143 mph
Join Date: Jan 2006
Location: North Fond du Lac, Wisconsin
Posts: 11,375
 iTrader: 1 reviews
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__________________
My daily driver has 16 cylinders and 4400hp @ 1000 rpm....  ***1988 Mustang GT - Stock....almost 
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