stupid TBI question

[BlackGT97]

how exactly is fuel thrown into the cylinders? ive never been abe to tear apart a TBI motor, so i am a bit confused. i know our MPFI the fuel is shot directly at the intake valve. heres a pic of the injectors. are there ventuirs or something?

 

[TheOtherNick]

thats not a tbi engine.

 

[BlackGT97]

well its not carbed and its definetly not sequential or muilti port

 

[BlackGT97]

heres the whole motor

heres the throttle body

 

[TheOtherNick]

Its multiport.

 

[TheOtherNick]

a tbi 5.7 has two injectors in the throttle body, where yours has 8 poppet nozzles.

 

[Fivefingerdeathpunch]

spider injection on 5.7 vortec

 

[BlackGT97]

so in a TBI the fuel and air is mixed before it goes into the cylinder like a carb...right?
its not my truck lol. but back to the original question. how is the fuel shot into the cylinder. they cant be shot into the intake valve

 

[Fivefingerdeathpunch]

just sprays into the intake manifold and get ditributed into each cylinder, not always the same amout tho.

 

[TheOtherNick]

In the pictures you posted it is shot into the intake runner in the intake manifold.

 

[BlackGT97]

thats kinda what i thought, i was just a bit confused probably overthinking it. thanks.

are there ventuirs or something?

 

[TheOtherNick]

no venturis, just an injector shooting fuel down a hole.