What's the advantage? I was just looking at a 88 crx drag car that dyno'd somewhere in the 360 whp range and it utilizes 2 webers. Do they allow for a higher max fuel delivery than really big injectors, to the point where it doesn't make sense to use bigger / more injectors? The ability to tune without having to use a computer to control fuel delivery? I realize that injectors don't necessarily give more power (ie carb'd sportbikes and race cars for decades until present), maybe a better curve or better variability however. Shed some light please.

I'm sure it's been covered here, but I rarely visit and I haven't done a lot of research on the subject.

Thanks in advance.

btw I say carbs 'cause I can't remember how to spell the whole word =]

 

Remember a carburetor is an atomization/emulsion machine. An injection system is a proper air to fuel delivery ratio machine. Two different concepts. If a carburetor can be designed to supply the perfect air to fuel ratio all the time it should consistently outperform EFI. Its design lends itself to have an unfair advantage in atomization.

Obviously adiabatic expansion is the next question on the list. So if we take a good look at the carburetor we see its not only a perfect machine for atomizing fuel, it also has another advantage. The joule-thompson effect.

Tests performed using quartz plates and infra red sensors located in the plenum area beneath an NHRA Pro-Stock engine revealed an intake manifold temperature drop on a 85 degree day of almost 20 degrees as a result of the the carburetor creating this effect.

So when your neighbor with EFI is ingesting 85 degree air, your power-plant could be ingesting 65 degree air.

courtesy of an old south carolina hondas thread

 

Thanks a lot. I guess I would've thought that an injector is a better atomizer of fuel, but what you say or quote makes perfect sense.

 

In addition to the above listed benefits, carbs are also "generally" much less expensive that the equivalent of ITB's and a stand alone EFI ECM.

Plus they sound cool

 

good thread, lets get more info