Just thought I'd put this out there for everyone to ponder. I can't find any info on this... maybe someone can help.

Does anyone know the flow rating (or whatever you call it) of the stock 2.4 injectors?

Would in benefit us any to upgrade our injectors while running a NA setup? How about tuning?

Thanks!

 

i dunno the rating, but pulling one out should allow that to be found out pretty easily.

Electronic injectors are basically solinoid valves. feed them current and they open. The ECM opens the injector for a certain period of time during the intake stroke. If you go to a "larger" injector, it will open for the same period of time but allow more fuel in that window. If one adjusted how long it was open, it would work out, but there isn't a whole lot of point to that if the stock one is already large enough.

NOW, if you had some wild cam that allowed the cylinder to fill very quickly, you'd need a larger one maybe, because the injector spray time is limited to the amount of time that the engine is intaking air.

Traditionally, VVT engines are hard to tune because it's varing the speed at which it intakes air. Therefore i can only assume that the stock injectors are "larger" than needed already so that it can use a very short spray time. <=== SPECULATION

 

i wouldnt look at going larger til you get FI, altho flow matching and a better atomization might be worth a $70 investment for tuning. it wouldnt give you any more power to flow match, but it might help with smoothing out the engine, a tiny bit better mpg, and easier to tune.

im possitive the stock ones are crap, i'll probably replace mine in the near future along with new plugs...

 

I have noticed that the engine seems to lean out just before redline. I could really tell from the sound of it when I had my SRI on. Bigger injectors might help that. As far as more power.. yeah, it's not one of those things that's gonna be a big HP gainer... it's kinda like a low temp. thermostat... just smoothes things out.