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You mentioned different spray patterns, is there an injector that sprays at closer to a 90 degree angle,ie downstream, instead of the floor of the intake opposite of the injector?



None that I have heard of
EDIT
also in the way a injector is designed it would be
real are to get one to fire at 90*.. if you look at
it, its got a long needle and seat per say.. the needle
is called the pintle which is pulled upward by the
electro magnet when fired and if the fuel touches
anything it would puddle so you cant just put a 90*
on the end of the injector




I agree, it would be hard to get a functioning design to emit fuel properly at 90 deg, but if you could, would it be much of a plus?



Sure it would.. it would be directed at the valve
and it would already have velocity