Inlet Manifold Design
Turbo Mini Forums

Looks like an injector shooting straight at each valve? Should work well.

Injector bosses are parrallel then ?

I thought if I ever build one (most unlikely) I'd try to find an angle to have each injector shooting at each valve.

But I guess it is not Siamese code friendly.
I believe the vertical layout is more neutral as the siamese code logic is not one injector per valve (maybe wrong here, I have not paid enough attention I guess ...)

Rusty by nature

So which one is the primary? Or is this not a staged setup?

Jean

http://www.jbperf.com/

Although it looks like I'm aiming an injector at each valve, that is not the case. This is just the simplest way to arrange the injectors with minimal fabrication plus gets them close to the valve and at least pointing in the right direction.

As Jean has stated, one will be the primary injector up until the engine starts to boost and then they will both work together. Under boost, they will both fire for around a full 360 degrees at first the inner cylinder and then the outer.

The fact that the primary injector is offset 8mm from the port centre will make little difference if any. Nothing flows in a straight line in the first place. Secondly, by the time the fuel has passed through the narrowing of the port between the pushrods it will be well spread out across the flow of air.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."