Injectors!

[Daboss]

Hey forum just wanted to get an injector question answered. I have a choice between two sets of injectors both have the same flow rate one has the four hole spray pattern(nismo), and the other has the single hole spray pattern(jecs). What I want to know from you guys is which spray pattern would be considered the better one to have, Four hole style or the single hole one?

[STATUS]

the four in your particular app.

[wht510]

Are you running an aftermarket fuel pressure regulator? (not that it makes that much difference)

I'd agree with Status. The Nismo ones.

[Daboss]

Now here is the other part to the question. The nismo ones flow basically 540 at 90% duty cycle at 43.5psi while the jecs flow 570 at the same duty cycle and psi. Which set of injectors should I stay with? I was thinking the jecs cause they offer more flow at the same psi, which I figured will be more room for tuning and safety. What do you guys think? Running an aftermarket regulator to answer the question.

[GIGOLO]

The single hole (similar to RX7 injectors) will cause pooling issues as the fuel will not properly distribute into the 2 intake ports. the 4 hole pattern is best as it is the same as the factory and will split the spray pattern more evenly into the intake ports.

[wht510]

You're running the factory turbo though aren't you?

What sort of horsepower are you aiming for?

[rob82]

Better atomisation means better fuel usage. I bet those injectors would make the exact same power.

[NSNPWR]

Have been wondering about this myself...I bought some 750cc Siemens which are as they call them a 'pencil spray' pattern...however, they are noted as having a cone spray pattern of 15 degrees which is not exactly pencil...

[JonnoHR31]

if you already have the nismos and a reg then just bump the pressure up a bit if you need more headroom. nismo have a very good spray pattern

[T04GTR]

both same resistance? the 4 hole, what brand is it? arart from nismo.. is it a denso, etc etc.

you will be able to make more power with the 4 hole ones as the stream is split in 2 and aimed at the back of the valves giving a better burn rather than spraying onto the port divider going all over the place..