hasenpfeffer
Husqvarna
Pro Class
Interesting...
http://apex-tuning.com/2012/07/choosing-the-right-injector/
http://apex-tuning.com/2012/07/choosing-the-right-injector/
Spray Pattern
Spray pattern is one of the most overlooked fuel injector characteristic, but it is also one of the most important. The required spray pattern depends on the intake manifold design as well as the shape of the intake port on the cylinder head and the intake valve configuration. Engines with a single intake valve will generally require a narrow cone or pencil spray pattern, while multi-valve heads (the 20v 1.8t, for example) work better with a wide or split cone configuration. Some applications will benefit from an offset cone, which is similar to the narrow cone pattern, but fuel is injected at an angle directing it towards the back of the intake valve. As injector technology advanced, the pencil and v spray patterns pretty much became obsolete, as the narrow/wide/split cone spray patterns offered better fuel atomization, increasing efficiency and reducing emissions by improving flame propagation in the combustion chamber. Ideally, you will want the widest, most diffused spray pattern with the best atomization without spraying the walls of the intake manifold runners and intake ports. Fuel spraying on the walls of the runners/ports will condense, drip onto the back of the valve, and slowly run into the combustion chamber, resulting in imprecise control of the injection event and an inefficient burn . When choosing a fuel injector, choosing the correct spray pattern for your application can dramatically improve idle and cold start and reduce emissions and misfires.