Maxed injectors?

[Ptothej]

Hey, take a look at my signature.. so Im using the power screw to adjust the idle, but have no idea how many turns which way it is, it seems like when I backed off the smoke screw and star wheel earlier this year it didnt do anything.. then within the past two days Ive cranked the smoke screw all the way and bottomed the star wheel out, and still nothing that Ive noticed, and if Im wrong it has been very slight changes. could the injectors be maxed? If so, is it worth while to put some non intercooled ones in? (not wanting to spend money on it that way, and the injectors are free and in an engine out back of my dads shop) thanks for your help as always!


P.S I also remember after playing with the power screw that my fuel pin didnt do much difference either.

[ellis93]

Nonintercooled injectors won't fit intercooled heads from what I've seen. I would check the afc tube and make sure its not cracked. Put some grease on ur fuel pin and see if its moving.

[Ptothej]

I think I slightly remember hearing something like that... yes the fuel pin is doing what it should. I do remember changes when all I played with was my smoke screw, star wheel and fuel pin, but since I jacked up the power pin for the idle, I have not noticed any changes by playing with those other settings. In case the non intercooled injectors would work.. Im just looking for some more fuel basically down low to get my boost numbers higher in the lower rpms.. up top is just fine.

[ellis93]

Might be problems inside the pump . I have stock injectors and have only done the afc mods and get some smoke now.

[oldestof11]

P, Non-IC are 9mm big. Anything after 91.5 is 7mm.

All the Non-IC have to make them bigger is "extra" material.

[Ptothej]

P, Non-IC are 9mm big. Anything after 91.5 is 7mm.

All the Non-IC have to make them bigger is "extra" material.

Sorry I dont think I quite followed you there.

[Ptothej]

Might be problems inside the pump . I have stock injectors and have only done the afc mods and get some smoke now.

The pump is a nwere rebuilt unit, and I do smoke if I tromp on it, but the smoke doesnt lessen or increase with my adjustments...

[JBradley500]

P, Non-IC are 9mm big. Anything after 91.5 is 7mm.

All the Non-IC have to make them bigger is "extra" material.

Sorry I dont think I quite followed you there.

the tips on the non-intercooled injectors are 9mm in diameter... the intercooled injector tips are 7mm in diameter...same thing for the hole in the heads that the tips go through so the 9mm injectors (non-intercooled) wont fit into a 7mm (intercooled) head.

[Mark Nixon]

P, Non-IC are 9mm big. Anything after 91.5 is 7mm.

All the Non-IC have to make them bigger is "extra" material.

Sorry I dont think I quite followed you there.

the tips on the non-intercooled injectors are 9mm in diameter... the intercooled injector tips are 7mm in diameter...same thing for the hole in the heads that the tips go through so the 9mm injectors (non-intercooled) wont fit into a 7mm (intercooled) head.

Not to mention the pistons in an Intercooled engine have the wrong bowls for the Non-Intercooled injector's spray angle.
The intercooled uses a narrower spray angle.

Mark.

[Ptothej]

I appreciate everyones input! Now I know more about the injectors. I havent heard much about your guys's ideas on my truck having the injectors maxed out though, has anyone else come across this, or do I do have a pump issue?

[Kiddspeed]

mine does the same it seems like my injectors are maxxed too. I know what youre talking about.

[Ptothej]

Oh wicked, what are your poump settings at? I just found out that my fuel screw was right at the bottom out point, I might of got 1/4 turn out of it.. so now all my pump settings are maxed!

[Ace]

I think the smoke screw and starwheel become pretty much useless with the fuel screw turned in.

[Ptothej]

Im thinking you are absolutely right there.

[JBradley500]

I think the smoke screw and starwheel become pretty much useless with the fuel screw turned in.

im pretty much thinking the same thing. i think the settings on the afc stuff have to be more drastic to see a change once the power screw is all of the way in... bigger injectors too

my starwheel went from all the way down to being up high enough to bind my fuel pin and that really seemed to help spool-up drastically.