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Injectors ....

Lepperfish

By Lepperfish,
in Engines & Forced Induction

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Lepperfish Mentor

Lepperfish

Posted
Posted

I know this topic has been talked about to death but here goes.

I need some injectors, can anyone confirm the size of the standard injectors? Will 550cc injectors be enough for around 400hp? Car R33 - RB25 is currently making 256rwkw but is leaning out at around 17psi.. Its still using the standard pump but a 600hp bosch unit will be fitted when the injectors are put in,

would 680cc be better to be safe ?

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GTS-t VSPEC Grand Master

GTS-t VSPEC

Posted
Posted

Yeah, I heard the SARD ones are selling for a good price through Greenline, Nengun etc. Unfortunately sidefeed injectors are in limited sizes, but choose ones which will provide enough fuel for your target hp, so you don't have to change them each time you get more power.

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Steve Grand Master

Steve

Posted
Posted

Sard injectors are a bit of messing around to fit. The o-rings supplied are too thin and I had to put my stock ones on. INASNT had to use two o-rings to get a seal. Further you must remove the rubber gromet in the top of the cap, and change the plugs over on the injector harness. The plugs, clips etc are supplied. You will also need collars.

Greenline are selling them for Y12618 each with collars.

Nismo 555cc injectors I have heard are straight fit and sell for Y13254, so about $8AUD difference. I am not absolutely certain that nismo will fit straight in, perhaps someone else can say who has fitted them?

In hindsite, I would definately be getting the nismos if I could do it over, for the sake of saving less than $50.

550 cc injectors should be good for up to 600bhp+, or close to 400rwkw (this is assuming 60kw driveline loss approx).

The only down side to larger injectors is that they can get difficult to tune for part throttle and idle, so be prepared to make some sacrifices if you head in this direction.

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