Bigger fuel injectors?

[NissanNut]

Can I just install slightly larger injectors?

I found out the stock 90-97 w/d21 vg30e injectors are 200cc. The vg30de use 270cc NA and 370 Twin turbo. Apparently 90-92 style plug right in my truck.

I know more fuel can equal more power. I have installed larger carbs on my old trucks and dunebuggys.

I still cant find what the vg33e in the frontier/xterra (w/d22) or quest specs are. Goggle does not work.

Anyone know what vg33 injector specs are?

[ef9]

No way in calling RC Engineering on this?

If you install slightly larger injectors, not sure if the ECU can lean out the mixture anymore? I know +/-15% is the most the stock ECU can go.

You may have to install an ApexI Super AFC or something. I actually have that installed in my truck as we speak.



http://www.apexi-usa.com/products/?id=5347

[NissanNut]

ApexI Super AFC thats pretty cool. I hope I dont need one. I plan to add a wideband O2 sensor just to measure fuel ratio. Just in case.

I think I will call RCENG again. They are very helpful. But dont sell side feed injectors. I wish I could find more specs on these things.

I saw some vg33/vg30 quest injectors on ebay. Same injectors for both engines it said. I guess its possible since the ECU can adjust.

[dvdswan]

I was wondering the same thing for the KA engine. want to install the 240 KA intake on my truck and it has 270 stock.

[NissanNut]

Well after talking to the Nistune installer the other day. He said it will not work. I need nistune if I want to change injectors.

[Jrev808]

Yeah Barry, I have been looking into all of this tuning for VERY long time. Its been about a year for me piecing together a turbo set-up. Something is definitely needeed to tune bigger injectors. Those Apexi safc help.... but they can only correct up to a certain percentage. Nistune is amazing. But i still dont know how to exactly fully tune it. Like I said before, I am going to run stock 300zx TT 370cc injectors and a 300zx MAF. I need nistune. For n/a engines, you can prob tune the ignition curve way advanced for some good torque.

[wanksta55]

Do you guys know if there are larger 370cc injectors that will fit the ka24e in the hardbody???

[NissanNut]

Are they the side fill style? I check in FAST if needed. I am not sure what the ka24de look like.

[Cuong Nguyen]

I thought all the VG30 injectors were roughly 180cc?

[wanksta55]

Yes they are side feed injectors, i just have not found any larger than the stock 270cc size. I need 370cc for my turbo.