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Gary Smith · 12-16-2007, 01:57 PM

Although not very detailed, there is a really good EFI article in the current Car Craft rag (Feb 2008 issue) on page 50. In reality, if you can wire a car, you can set up an EFI system. To support what Evan Smith pointed out earlier, there are advantages AND drawbacks to EFI systems. Same goes for carb engines. The trick, no matter what you run, is knowing how much fuel to apply based on what the engine is doing. THE ONLY ADVANTAGE OF AN EFI SYSTEM is it's ability to add or take away fuel throughout the RPM/power range based on engine load and oxygen readings. I run a simple speed density system without an O2 sensor (runs in open loop). The "tuneup" is just like selecting proper jetting and power valve choice on a Holley style carb. Matter of fact there are carbureted cars out there using sophisicated wide band O2 sensors that are tuned better than many EFI cars. Then there are those EFI cars that run better than many carb cars out there due to the amount of time and "homework" the driver/builder/tuner has put into the setup. So in the end, it's still all about rated horsepower. Induction properties will always be proportional to the limitations of the intake system, whether carbureted or EFI. Simply put, it all comes down to combination choice.

12-16-2007, 01:57 PM	#24
Gary Smith Senior Member Join Date: Jul 2007 Location: Greensboro, NC Posts: 820 Likes: 9 Liked 132 Times in 30 Posts	Re: Dommination of FI cars. Although not very detailed, there is a really good EFI article in the current Car Craft rag (Feb 2008 issue) on page 50. In reality, if you can wire a car, you can set up an EFI system. To support what Evan Smith pointed out earlier, there are advantages AND drawbacks to EFI systems. Same goes for carb engines. The trick, no matter what you run, is knowing how much fuel to apply based on what the engine is doing. THE ONLY ADVANTAGE OF AN EFI SYSTEM is it's ability to add or take away fuel throughout the RPM/power range based on engine load and oxygen readings. I run a simple speed density system without an O2 sensor (runs in open loop). The "tuneup" is just like selecting proper jetting and power valve choice on a Holley style carb. Matter of fact there are carbureted cars out there using sophisicated wide band O2 sensors that are tuned better than many EFI cars. Then there are those EFI cars that run better than many carb cars out there due to the amount of time and "homework" the driver/builder/tuner has put into the setup. So in the end, it's still all about rated horsepower. Induction properties will always be proportional to the limitations of the intake system, whether carbureted or EFI. Simply put, it all comes down to combination choice.