Fast Wide-Band Digital Air/Fuel Meter

This FAST Air/Fuel meter is one of the best tools I have bought lately. Works Great, and is easy to install. Makes jetting a carburetor Simple. Very Useful machine.

Great product that has made tuning the carburetor on my muscle car w as you easier. The only thing that I dislike about this product is the way the cables attach to the handheld unit. They mount to the left side and make it almost impossible to mount in the car.

This purchase was a mistake. After speaking to three different fast techs and several hours of troubleshooting why it wouldn't read properly, I was told to put it back in the container and send it to the FAST distributor for repairs. They never contacted me when they recieved it and have now had it for a month. When I asked what was taking so long the rep replied,"it's racing season and that's why its taking so long."worst $500 I've ever spent.

Just what I was looking for, just a great tool for tuning. Quick and easy install. Just wish the rpm module came with it. But it is what it is.

This is a tool, but if you don’t know that, then I don’t know why you’re reading this. To keep it as short as I can every engine is different, but a four stroke gasoline engine is designed to run at a certain air and fuel mixture ratio. This is a wide band meaning it reads the exhaust gases and the text the O2 or oxygen level in the gases, exiting the combustion chamber so you can adjust fuel and air so that your engine is not running too Rich( too much fuel ) or it is running lean ( not enough fuel ) doesn’t matter if you’re using simply a carburetor or fuel injection. If you have the ability to adjust the fuel intake. Let’s hope you do. Carburetor Jet sizes, air fuel mixture, screw air cleaner, choice EXT. Fuel injection. Line pressure, injector size injector spray length timing. This is gonna show you how the engine is running through the entire RPM range log it and play it back so you can see where you are with your. A/F mixture. I said in short, that wasn’t short, but also wasn’t incorrect. Here. A "perfect" air fuel mixture, also called a stoichiometric mixture, for a gasoline engine is considered to be a ratio of 14.7 parts air to 1 part fuel, meaning for every 1 gram of fuel, 14.7 grams of air are needed for complete combustion; this is often referred to as a 14.7:1 air-fuel ratio.

works great ! Nice product ! Complete kit ! Fast shipping

Product arrived faster than expected and have already used it 5-6 times and it works perfectly. I would recomend this to anyone that is looking for a product to aide in tuning of an engine.

excellent product!!