Carburetor vs Fuel Injection - Why Motorcycle Riders Should Think Again

That's a tough question, this is a

carburetor

but you don't see it because the

fuel

injector replaced it as a better way to squirt gas, but is it because there is a subtle error and a simple lie that motorcyclists have believed here and both They come from the automotive world fundamentally, when we step on the accelerator, we are not actually adding

fuel

, we are opening this throttle valve to allow more air to pass through. Wind would be a more accurate expression, so try it the next time you take your lady for a walk. Since we have the wind flowing in one direction, there aren't as many random collisions of air particles, which means there isn't as much air pressure and all we have to do is provide a fuel source here and it will be absorbed by our fuel tube. intake because it has a higher flow and lower pressure than Charlie Sheen's left nostril, you don't need an injector just physics, so how much fuel do we want?

Well, 8 8 18 18, so 25 looks like one part for every 12 and a half parts. air and that is a complete combustion where all the fuel generates all the power and not just useless emissions. The problem is that sometimes the engine pumps slow sometimes fast. How do we make sure it feeds the correct amount of gasoline? First you need a fuel line and a float. To plug it this way, our gasoline always starts at the same baseline so we can control its delivery rate. So we have a jet that is the perfect width to deliver fuel at idle. As the throttle needle rises, it gradually exposes the main jet. quarter trimmed at quarter throttle then half trimmed three quarter trimmed but fully open the main jet is precisely the width of your drawers finally we need a way to manually throttle the air supply and trim the fuel mixture this is only for special cases like when the air is thin in Colorado so you have to adjust the idle fuel level to match or when the fuel is cold at start it doesn't vaporize much so you have to reduce the air supply to match by pulling the knob of the choke and some people find it inconvenient to pull the knob once or twice a day, but nine out of ten men don't mind, and that's it, a purely mechanical route to almost precise stoichiometry in a wide range of uses.

People say carbs are simple once you understand them, no. It's just not like that, so we invented electronic fuel

injection

, you play with the throttle, just leave it to the engine sensors to measure how much air you let in so the engine computer can tell this little guy how much fuel to inject, perfect, simple and complete. They lie and cars custom fuel in real time, but

motorcycle

s don't, what really happens is they run a prototype on a test bench fast slow hot cold to determine the ideal amount of fuel for each condition. This information is recorded on a fuel map which is then uploaded to every ecu that hits the showroom floor, that means I need an acceleration sensor to read my input idiot a crankshaft sensor to read my engine temperature sensor. rpm pressure sensor the bike takes all that information to its fuel map and says this is the closest condition we have experienced, let's try that amount of fuel, it knows how to start without a choke, it knows how to idle in a step of cold mountain, but it's not perfect.

Motorcycle manufacturers can't test for all conditions, so fuel maps have holes where fast throttles are found. on many modern

motorcycle

s, not to mention no two identical machines, the prototype is a grand piano that has every string tuned, but the fuel map your motorcycle imports is not tuned, just hit the piano with someone else's hammer and wait for it to come out. It sounds pretty good, so both things only provide a nearly precise stoichiometry, so under your butt you can't tell the difference between them, but keeping the fuel injected directly into the chamber leaves more room for air in the intake, more air

should

give more arm. more power and this gas spray cools the chamber directly which means we have a denser charge to compress a higher compression ratio

again

there

should

be more power yes it's all true and good in cars motorcycles can't squeeze the direct

injection

because they accelerate very quickly there.

There is not enough time for the gas to spread before it needs to be fired

again

, so motorcycle fuel injectors are all port injectors that spray in the same place as a

carburetor

. Same performance. The big gains from fuel injection were always more relevant to cars. Motorcycles are just a drop in the ocean washed up by a ship already sailing there. There hasn't even been a carbureted car since 1990, the same year that, coincidentally, Congress amended the Clean Air Act to encourage the use of carbon fuel. corn and gasoline see separated ethanol gas turns into a goo in a matter of weeks and the only reason that's not a major sticking point is because all cars now run on high pressure injectors that clean the gun, which which means that motorcycles with carburetors have recently become a headache if you forget this Harley for In four rainy weeks like I did, the ethanol-clogged jet won't start, requiring a complete carburetor cleaning every four weeks so both carburetors and fuel injectors work great but injectors are the future because they allowed for future fuel that made carburetors a thing of the past and that's a clever trick