Does fuel injection in Motorcycles rob power?

Question

I have a friend that swears if you have two identical motorcycles the one that is carborated will outrun the one that is fuel injected. Is this true? Isn't it really about the amount of fuel that is sent into the engine not nessasarly the way it is sent

Answer 1

Fuel injection is more efficient.
A fuel injected enginemakes a good deal more power than a carbuerated one.
For instance, when Chevy injected it's 5.7 liter V-8 it gained 40 hp.
And it's not the amount of fuel as much as the way it is delivered, it has to be very finely vaporized to burn the best and injection does that better.

Answer 2

All the answers on here are correct, but don't mention 1 major advantage that Fuel Injected bikes have over carburetted ones. If you're going to ride any distance where altitude changes are drastic, the FI bike will automatically adjust itself, whereas the Carbed bike will need manual adjustment and/or rejetting. Of course if you've go the money, you can always put a spare carb in your saddle bags.

Answer 3

Fuel injection is not quite the savior of all mankind that marketers have led the gullible to believe.

Assuming otherwise identical engines using identical motor fuels (gasoline, methane, propane, butane, hydrogen, etc.) and properly designed, manufactured and calibrated (“tuned”) induction systems, under ideal conditions, a carbureted system will produce a broader and fatter torque curve (and consequently, more horsepower at any particular rpm) and/or a lower BSFC (and consequently, better mpg) than an injection-based system.

Examples intending to indicate the superiority of one technology in preference to the other based on the choices of racing organizations (whether of particular vehicles/teams, classes or sanctioning bodies) are fallacious in that the racer is ultimately limited by the rules of his or her sanctioning body, and by his or her budget and personal preferences.

Although there have been some amazingly effective self-tuning carburetors, for mass production applications (such as in mainstream automobiles), comparable fuel injection systems are both less expensive to produce and more precise in terms of the quality of fuel metering and delivery.

Add to that the comparative ease of dynamic tuning, and the stage was set for the domination of fuel injection systems in production automobiles.

Hand-built exotics and megadollar automobiles rely on fuel injection not for ultimate performance, but for perceived quality: drivers don’t want to fiddle with carburetors when the ambient conditions change.

There is a relatively new sort of fuel injection for gasoline that may eventually prove more efficient than carburetors: direct injection of the fuel into the combustion chamber (like diesels have been doing for many decades). This, together with advances (no pun intended) in ignition technology, has led to the elimination of the traditional starter.

Most motorcycle fuel injection systems are of the vacuum-pulse sort, and are not directly comparable to EFI systems found in cars and light trucks. At the risk of oversimplification, it’s about the cost of manufacture: the pulse FI works well enough for most buyers, and it’s much cheaper for the maker than a proper carburetor setup.

Yes, there is ordinarily a slight performance penalty when using FI on a motorcycle, but this does not noticeably affect most users.

As to whether the FI actually *robs* power, I doubt it: it seems that it just doesn't make quite as much power to begin with.

Answer 4

Fi is the only way to go if if your completely oblivious to the set up and jetting of carburetors,so basically the manufactures gave you the best they have to offer, if you know someone who sets up race bikes, (which I doubt!) I'm sure his carburated bike will blow the paint right off your fi bike

Answer 5

their are NO fuel injected race bikes OR cars, NASCAR uses a carb as do all race vehicles. when racing carbs do beat fuel injected vehicles period end of story.

Answer 6

fuel injection was added to increase mileage and power . the carburated bike must have been tuned for better performance

Answer 7

Like the other say fuel inj. preforms WAY better then carbs. Every time.

Answer 8

it doesn't really rob too much power it's just more efficient. that's what happens when things get more technical people start misunderstanding exactly what its performance is for.

Answer 9

your friend is wrong....tuned properly fi wins every time
+ it starts better and gets better mileage

Answer 10

don't ya jusr friends that don't know a dam thing about stuff like that lol