#Ls self tuning ecu manual

This information allows the EFI unit to have a baseline for the initial startup. It is a bolt-on unit with a handheld calibration device that requires some basic information to be imputed manually.

The Sniper takes the spot of the basic carburetor by bolting down in the same fashion as a regular carb. As the owner continues to drive, the Holley’s computer makes necessary adjustments whenever additional demand is placed on the engine. The unit has a built-in ECU built into the throttle body that self-learns the car’s driving habits and what fuel mix is needed.

#Ls self tuning ecu manual

There are no manual adjustments, tuning, cleaning of clogged jets, or anything else wonky. The Holley EFI is a self-contained unit that you bolt on and turn the key on. (Many classic car owners will tell you that “tuning’ a carb can be a pain in you know what to get it set just right). The unit is self-tuning (meaning that you don’t have to adjust or “tune” it after the installation as you would a carburetor).

Here is why we love the Sniper EFI system so much. The Holley Sniper is aptly named because it delivers precisely the right amount of fuel into a classic car’s engine based on the conditions of that moment. (But who lives in a place where the weather never changes?) What is So Special About the Holley Sniper EFI? The truth is that if you live in an area where the weather never changes, and you are driving all the time, then a finely-tuned carburetor is all you need. This is why a classic car has trouble running on a cold day or after sitting for a while - you are asking the carburetor to perform a function it was not set to do. (It's like throwing a dart at the same place every time and hoping you hit it).Ī carburetor will only run efficiently if the conditions when it was first tuned (adjusted manually) exist. A carburetor delivers the same amount of fuel and hopes it is enough to turn the engine or keep it running. There are no sensors, computers, or ways to make adjustments. The intake valve in each chamber opens, the fuel-air mix rushes in just as the piston rotates up, compressing the gaseous mix, and the spark plug fires to create combustion.Ĭarburetors are inefficient fuel delivery systems. As more demand is required of the engine (you put your foot on the gas), air gets sucked into the carb, and the fuel and air mixture gets sent to the engine cylinders via a small hole called a jet. Basically, fuel comes from a pump into a holding bowl in the carburetor. There are times when more pressure helps get a job done) How Does A Carburetor Work?Ī carburetor is a much less sophisticated form of fuel injection. (The difference is like placing your thumb over a garden hose, rather than just trying to clean the driveway with a simple trickle. This means that while the electronic fuel injectors spray the right amount of fuel into the engine in a sharper, more intense burst than the gentle mix of a fuel port in a carburetor. The PSI (pounds per square inch) for the EFI unit is 50-60PSI, versus 5 - 7PSI for older, carburated units. The ECM (electronic control module is a tiny computer that receives signals from sensors placed all over the engine and uses that information to calculate exactly the right amount of fuel a car needs to operate.Įlectronic fuel injection has a higher pressure point than a regular carburetor. Electronic fuel injection is precisely what the name implies, the ability of the car to electronically inject the precise amount of fuel needed to operate at peak efficiency.