1 more injector question

[Sutter1stgen]

The lighter the car the less load so therefore the less boost so that would mean less fuel needed..... is that what you were trying to say RC

I believe thats what he was getting at. And it makes sense too. But I wonder if gearing would help apply a load. Or would it be counter productive. I'm sure theres a happy medium.

[RCCUMMINS89]

Agreed on the spray pattern.

But no, not really. It has to do with combustion physics. People who hand load might understand what I'm saying.

In a simple way.... the lighter the load, the faster the explosion needs to be in order to create a fast rate of burn (quick revving engine as opposed to a "torquey one") Like how a 383 can keep up with a 440 in the 1/4...it's because a 383 is a "fast revving" engine.

One can create the way an engine burns by the fuel/air it is given. The way an injector is designed (holes/size/flow) creates different types of fuel and the way it burns.

For a fast revving engine one needs more/smaller droplets of fuel. This gives this engine a quicker rate of acceleration through it's stroke.
A slower (heavier) vehicle can benefit from a less/larger droplets of fuel equaling the same volume..... this gives this engine a longer push through the stroke.


Clear as mud yet?

[RCCUMMINS89]

There is a lot more to it than above.... and it doesn't mean that a 8 hole inj. or 7 hole injector is the answer.... because it isn't.

What it means is a 5x18 injector is not going to perform the same in a 3000# vehicle has it will in a 6500# vehicle with larger tires.

[turboram]

I think you are confusing heavy loads for low rpms

[Remps]

I was daily driving my 5x18s with an h1c and a 5 spd too btw.

[RCCUMMINS89]

Apparently no one has any idea what I'm saying.

and no I'm not talking about anything remotely close to rpms nor heavy loads.

[RCCUMMINS89]

I've been looking through my posts and I don't know how else to explain what I'm trying to explain. I apologize for that.

[Deathrod]

I've been looking through my posts and I don't know how else to explain what I'm trying to explain. I apologize for that.

Pm sent

Leaning towards 5x14s that I can open up later if needed. My thinking (maybe completely wrong) is more fuel will help load the engine and build more boost since I don't have much of a load. I'm thinking this way because that's how it seems to feel messing with the fueling I have now. I also think I tighter converter would have the same effect.

[RCCUMMINS89]

I follow what you are saying.... ya in most situations, a heavier load will hinder spooling.... in your case I would agree that a tighter converter will help spool it.

[Sutter1stgen]

I understand what you mean. A lighter vehicle wont apply a load, won't make as much boost to clean up a larger injector, and would probably not perform as well as a cleaner burning setup.

What gears are in this light vehicle. A taller gear with apply more of a load. And another thing to consider would be the tighter converter. Which in itself would apply a load sooner in the power band, and not blow through in the mid and upper part of the power band. Which in a sense would apply even more load. With nothing else changed besides the converter, I bet you'll notice a boost increase. Which would help burn a larger injector.

[dazedandconfused]

I believe he is running a 2.75 gear or close.

[Deathrod]

Yup 2.75s but with 28" tall rear tires its roughly the same gearing as the truck when it had 3.07s. A converter is on the list, but it requires pulling the motor and trans to install (space requirements) so I'm stalling due to my laziness. I do manually control the turbo and can add boost to match fuel, I have no trouble clearing up stock non ic sticks.....so kinda adding drive pressure adds load is how I guess I can explain how it works, I have learned a lot on how DP affects load/ boost/ power/ rpm....etc by controlling the turbo myself, I wish I could write tunes for my truck knowing how vgts work now.....dam computers!!!!