APT smartcarb, sounds cool...

[subxero]

http://www.powerapt.com/smartcarb.php

Jetless carb, whats not to like?

curiosity is peaked and considering trying to get one of these for my dirtbike.

from what I read they are currently for 2stroke engines. Would be cool if they made something like this for the ninjette though not likely.

[mgentz]

very interesting.

[Kscreations08]

Link to original page on YouTube.

[adouglas]

Sooo.....

assuming it could be made to work on the Ninjette (I see no compelling reason why it couldn't), you'd be spending $1350 to gain....

what, exactly?

[InvisiBill]

Originally Posted by adouglas

Sooo.....

assuming it could be made to work on the Ninjette (I see no compelling reason why it couldn't), you'd be spending $1350 to gain....

what, exactly?

http://www.powerapt.com/Technical-Information.php

The SmartCarb embodies numerous APT-perfected design features that provide extremely fine fuel atomization, precise air/fuel mixture control and ambient air density compensation.
...
Ultra fine atomization means a more complete and significantly cleaner combustion burn, resulting in lowered emissions, greater fuel economy and increased power. By effectively atomizing the fuel prior to combustion, more of the fuel is consumed during the combustion process. In addition, smaller fuel droplets mean more of the fuel’s potential energy is released during combustion, leading to an increase in power. Extensive testing utilizing dozens of engines has yielded a minimum power increase of 5% and as much as 14%.
...
This constant yet continuously equalized pressure between the venturi and the floatbowl provides efficient air/fuel mixing within the SmartCarb, regardless of altitude, air temperature, or changes in air density.
...
SmartCarbs are highly, yet easily adjustable via the mixture adjuster on top of the carburetor and the idle adjuster on the side. Both adjusters are readily accessible by hand without having to remove the carburetor from the engine or even getting off the bike. Making mixture adjustments is as simple as turning the engine off, opening the throttle all the way and pushing in and twisting the adjuster to make fine mixture adjustments.

Sounds neat, but quite expensive (the cast ones are quite a bit cheaper than billet at least). Also keep in mind that they're flat-slide carbs rather than CV, so that will require some adjustment too.

Personally, I'm more likely to go with an EFI setup for the fancy tuning options, even if the atomization isn't quite as good.

[subxero]

Originally Posted by adouglas

Sooo.....

assuming it could be made to work on the Ninjette (I see no compelling reason why it couldn't), you'd be spending $1350 to gain....

what, exactly?

cast ones would be much cheaper prob 300-400 range. soo not quite $1350. In theory a dual cast carb could probably be in the $700 range

Just a different take on a carb. People don't like carbs because they are a constant. You change elevation and you are stuck with the jetting you have less tearing the bike apart. You can see a larger % loss of power when changing elevation plus fine tuning a carb can be a PITA.

This carb adjust for elevation by it's self and you can make adjustments to base line jetting by simply turning a knob/screw, they boast better atomization of fuel IDK why it would be much better?

why would it be as good or any better than EFI. Well no reason to have computer program and mess around with fuel maps ect... any one could tune their fuel delivery in minutes and try something else if they don't like it.

[adouglas]

Yeah, I get all that... just looking at the big picture.

When we start going in this direction, it's getting into that territory where the last one percent of performance takes 90 percent of the cost and effort.

Maybe worth it for high-level racers, but for the rest of us? Nah. Dollars to donuts you'll gain more performance by improving your riding skills... and that costs nothing.

Similar things go on in bicycling all the time. People spend hundreds -- even thousands -- to shave a couple of hundred grams off their equipment, when they could lose many times that for free by getting thinner.

The rational question to ask is: Will this solve a real problem, or is it just a "grass is greener" farkle? That's for the individual to decide. Will you save enough fuel through better atomization to offset the cost? Are fueling issues caused by elevation change REALLY causing issues for you?

Or is it of interest simply because it's cool? Nothing wrong with that... most people spend big bucks on exhausts, for example, because of the sound, not because they can actually take advantage of the marginal power increase.

[subxero]

I get ya.

Yeah, I think for most people your standard weekend warrior this is not something that is going to turn you into Ricky Carmichael. Its cool, you can tell your buds and random people you have "THIS!!" and then make up **** when they ask you specifics about it because in reality you have no clue how it works but some guys from a motorcycle magazine said it was great and would give you gains and it just sounds cool

It's funny even to me to consider this for my dirtbike because you can literally get to the needle, and jets on a single cylinder dirtbike in 5 minutes... but it is such a PITA

Doing jetting on the ninja makes jetting on a dirtbike a joke and the ninja is not all that bad after you get the right tools