how can small engines have more horsepower then bigger enignes
12-02-2009, 05:20 PM
#31
500 Watt CAFz'r
Join Date: Oct 2009
Posts: 730
Sure is, that is the reason for restrictive intake and exhaust tracts, conservative spark and fuel maps. Fuel efficiency is the name of the game, especially today, with fuel pricing being as volatile as a wet fart. Think about when you add an intake and exhaust system to your vehicle. It "opens" it up, thus breathing better, but it consumes more fuel. Test it. 5 bucks in your tank after it's run dry and quits and before you mod it. Drive it VERY conservatively until it runs dry again. See how much distance you get. Then throw on your parts, rinse and repeat. The motor takes in more air, the computer "sees" this, and adjusts fuel and spark maps to make it run Stoich. Bottom line is more air=more fuel=more power=higher fuel consumption. The engine doesn't burn the mixture more efficiently, it's simply burning more, and being more productive in power.
12-02-2009, 07:16 PM
#32
50 Watt CAFz'r
Join Date: Aug 2007
Posts: 109
Sure is, that is the reason for restrictive intake and exhaust tracts, conservative spark and fuel maps. Fuel efficiency is the name of the game, especially today, with fuel pricing being as volatile as a wet fart. Think about when you add an intake and exhaust system to your vehicle. It "opens" it up, thus breathing better, but it consumes more fuel. Test it. 5 bucks in your tank after it's run dry and quits and before you mod it. Drive it VERY conservatively until it runs dry again. See how much distance you get. Then throw on your parts, rinse and repeat. The motor takes in more air, the computer "sees" this, and adjusts fuel and spark maps to make it run Stoich. Bottom line is more air=more fuel=more power=higher fuel consumption. The engine doesn't burn the mixture more efficiently, it's simply burning more, and being more productive in power.
12-03-2009, 11:02 AM
#33
500 Watt CAFz'r
Join Date: Oct 2009
Posts: 730
Bolt ons or computer altering are the same thing. "Tuning". I have a very hard time believing you can get higher fuel milage from a factory stock vehicle by simply altering fuel and spark maps "chipping". Considering common vehicles are designed by teams of engineers to achieve durability and economy. Do you not think that if there was more fuel efficiency already built into these motors that the teams of engineers and business executives would tap into that? Fuel economy=more profit for car companies
12-22-2009, 10:48 AM
#36
50 Watt CAFz'r
Join Date: Oct 2007
Posts: 146
A turbo on it's own doesn't produce horsepower, it pushes air into the engine allowing the engine to produce more horsepower. Keep in mind though, that 2l engine is more expensive to run and build then the 3.5l because it has stronger parts inside it to allow the engine to make that power. As well, many of those engines need to have premium fuel in order to run.
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