Terbowetoo

Ive been in to FC's for awhile now, but ive always liked the look of the FB better... Something about "oldschool" comes to mind. The only thing that scares me is carbs, seeing as how i know NOTHING about them, literally. could someone pleae, in detail, describe how carbs work on a rotary, and compare them to fuel injection?



btw, sending me a link to past threads or websites would work too...

vipernicus42

iTrader: (4)

Carbs are a relatively complex system if you want to get into big detail, but can be relatively simple if you limit yourself to the basics.

I don't know much about them, but there are some experts on here that would be glad to give you a hand if you had some specific questions about them.

Carburetors are great (IMO) for one thing. You can tune them with a simple slotted screwdriver!

Jon

The_7

i know a decent about about carbs but not nearly as much as other people on here but ill give a shot anyway.............carbs get very complicated but the principle of how they work is relatively simple. the carb on a rotary works the same way as any other car. the throttle bores (holes) go down through the carb and there are usually four (on a car). in these holes there is a valve (called the throttle valve) that opens and closes (one for each bore) and is controlled by the gas pedal. there are tiny jets that squirt fuel into each bore. the bores are also called venturi....they are not the same diameter all the way through...in the middle it gets smaller and the fuel jet is just above this spot. when air flows through a vacuum is created where the fuel jet is (im not exactly sure how that works maybe someone else can enlighten us) and fuel is sucked out of the jet, vaporized, and mixed with the air. the more air through the venturi, the greater the vacuum = more fuel - more power. at full throttle there is the most air, the greatest vacuum, and the most fuel, hence the most power. as you decrease the throttle, the amount of air decreases along with the fuel and so does the power. when idling, the throttle valves are almost completely closed and there isnt a sufficient vacuum to draw enough fuel. however on the other side of the valve there is a very strong vacuum (think about it you will see why) and this is where a extremely small jet is placed (called the idle jet) which is specifically designed for just when the engine is, you guessed it, idling. the adjustment screws on the carberator change how much fuel flows through the jets which affects the performance of the engine. well thats pretty much how it works . there are other things involved too (floats, etc) but you can easily find information about anything else you want to know in a book

anthrax

http://auto.howstuffworks.com/question377.htm

Above is a link to the How Stuff Works web page on Carbs. This is an excelent source for backgound inofrmation. There is also a rotory enging page as well. Take the time and read throught this it sould help on an introdutory level.

And Carbs are nothing to be affraid of

Good luck

anthrax

Terbowetoo

Wow guys, thanks alot... I like that howstuffworks site, thats where i learned alot about rotary engines awhile ago... and youre right, carbs arent THAT scary...

Terbowetoo

Wow guys, thanks alot... I like that howstuffworks site, thats where i learned alot about rotary engines awhile ago... and youre right, carbs arent THAT scary...