It comes from the electric motor and battery in a hybrid car.The point is: if there is a significant amount of "extra power" or "extra mileage" to be had... where could that energy come from?
Suppose you have a 200HP engine. If 20% went unburned, that would mean at full power about 40HP (about 30,000W) were being burned in the CAT. Some of use who do heatsinks have a rough idea what 20kW would do to something that size... let's just say it would rapidly melt.
No, you can't and I genuinely hope nobody starts screwing with their engines based on that statement. I know a tiny bit about engines (about 50 years experience) and I will absolutely GUARANTEE that if there was even a 5% gain to be had by "tuning" the engine, car and bike makers would be using it. car makers are pressed to meet CAFE as it is and the FED is raising the numbers. They will pay big fines if they don't meet the MPG limits.Thats how you can nearly double your MPG numbers in many vehicles just by modifying the emissions systems
If you have a magic tweak that does that, please post some dyno data showing the improvement.
Computer Chips and Programmers
Automobile manufacturers employ some of the best and brightest engineers and have billions of dollars dedicated to research and development. One fuel-saving device the industry has developed is the computer chip or programmer. To save on fuel, a programmer can be downloaded into a vehicle’s electronic engine control system. It will “lean” the fuel system during cruise in order to increase fuel economy. But like Newton’s Law of Physics, anytime an action occurs, an equal, but opposite reaction takes place. Though this programmer may help your fuel economy, it can also cause potential long-term damage to the engine’s valves or pistons. Many of these chips and programmers work well at increasing fuel economy, but have little regard for durability or emission requirements.
Installing High Flow Intake and Exhaust Systems
High flow intake and exhaust systems increase an engine’s volumetric efficiency (the breathing of the engine). These product manufacturers claim incredible fuel economy results, but independent testing frequently shows only nominal increases in power and fuel economy. Sometimes, the cost of these products outweighs the actual realized fuel economy increase.
Then I guess I don't know where to look. Please post any modifications done where a reputable lab test showed an increase in either power or mileage based on that mod.They are still all over the place online if you know where to look.
Please post a link to any case where simple or inexpensive mods were made to a properly running engine that resulted in significant increases in power or mileage.They are still all over the place online if you know where to look.
How many stories and write ups have their been over the years about how some well known and published auto magazine teamed up with a good reputable engine builder and turned a low powered fuel pig of a stock engine out of some generic vehicle into a powerful fuel efficient and highly reliable ,now 'off road use only' rated, street rod engine with before and after dyno and fuel consumption tests to prove it?
Back in the 60's I remember the story of the magic 100 mpg carburetor the Oil Companies bought so they could bury the design. Do a search, that myth persists to this day as well.Back in the 1990's when I was getting out of high school these where nearly the story of the week in every major auto enthusiasts magazine and had been since the earliest days when the government started stepping in and dictating that what comes out the tail pipe is more important than how much fuel it takes to get some place!
As I said previously, they rely on running the engine lean. Higher temperature, lower lifespan.
???????????? A "typical" 750 bullet bike weighs about 450 to 500 pounds, and puts out maybe 100 - 125 HP. With rider, the weight/power ratio is around 6 pounds/HP. Name a me a typical sedan in that ballpark. And the gas mileage would be in the 35 - 40mpg city range and about 50 - 60 highway depending on speed (air drag is dominant). The "liter" bikes (1000 cc) can have power up to maybe 160 HP. Gas mileage drops slightly, but is still far better than any car with comparable performance.Regarding motorcycle engine I have no clue as to their changes or modifications let alone what improvement can be made. What I do know is I know far too many people with motorcycles that at most 1/5 the wight of a average sedan and have 1/3 the horsepower but yet get nearly the same MPG numbers. WTF is that about?
That's my point. carburetor engines were really bad for getting power out, nothing like new engines. The engine in my 2002 Chevy Cavalier is 144 cu/in and gets about 160 HP out with no turbo (FI, tuned intake and exhaust). New cars get WAY more mileage/power than cars did even as recently as the 80's, and they have to in order to meet fuel standards. If somebody is saying they can "tweak" 40% more mileage or power out of a newer FI engine, I am calling BS on that. Is not possible. They don't leave that much power untuned in the basic engines anymore. And I would like to see any actual test data showing somebody took a newer FI engine and did some "magic" and suddenly reduced fuel consumption even 20%.Actually it is just the opposite. In the days before fuel injection it was common to re jet an emissions compliant carburetor slightly richer to around a 12.9:1 A/F ratio opposed to the stoichiometric
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