It should be misting it at the same place every time on that compression stroke.
All I see that The ECM and injector solonoids, can control is the injector fuel timing and not the injection timing into the cylinders and I just don't see how the injector fuel timing changes performance of the engine when the fuel is sprayed into the cylinder at the same piston position every time. The mechanical crank and injector cam timing that sets the piston position and the injector firing position is the same each time the engine goes through its four strokes so how does this settup really control the injection timing of the fuel into the cylinder.
I know by the electronic changes these programs make it does change or change somthing because of how it effects performance but I don't understand how it does that much to the performance when the mechanical injector that is worked by the injector cam is gonna spray at a certain degree of the pistion travel BTDC each time, no matter how long or what time that fuel inters into that injector body from the controlling of its solonoid. When I think of changing actuall injection timing I think of changing the mist timing of the injector popet in relavance to a certain degree of the piston position before Top Dead Center (BTDC) Say like 30 degrees BTDC to say Like 35 BTDC or somthing like that as an example. I can see how it can change pulse width, and the timing of the fuel entering into the injector body itself from the solonids controlled by the ECM.īut the actuall injection timing is fixed thats when it is misted into the cylinder because it is all gear timed in the gear trane of the front of the engine. What I have never really understood is how do the different programs actually change the injection timing on these engines. I know that different programs and uprates change the fuel timing and alot of other things dealing with performance.