Are 440 injectors big enough?

[Spins]

I have 95 sr20det blktop. Currently I'm running 12psi on smic,with upgraded fuel pump,3in dp and exh. I plan on running 14psi on a ARC smic. I saw some 440 injectors. Would these be big enough? I was planning on purchasing a SAFC2 and a bigger maf if needed. Will I need the safc 2 to run these injectors or will the stock ecu handle them? I know I will need the SAFC to control the larger maf.

[Bryants95240sx]

i would think 12 psi on stock side mount would be a little much i thought 10 was the max recomended

[180fan]

The ARC SMIC can take 14psi, but I wouldn't recommend it. Max I'd put on that smic is 1 bar. The 440cc injectors will be enough to supply the 1bar of operation, but at 1.1 bar, You'd probably get real close to maxing out the injectors and heat soaking the intercooler. The ARC can do 1.1bar in bursts, not recommended daily.

[Spins]

What about the stock ecu. Would it be able to run the larger 440 injectors or would my idle be crap? My car is an auto and I dont beat the crap out of it daily. I do so spirited driving in spurts. I can control my boost with the right foot. Mostly I only hit 10psi now unless I floor it. Do I need the larger the maf?

[Def]

FYI, 1 bar = 14.5 psi

I also wouldn't run that much on a SMIC. The ARC is better than stock, but isn't all that impressive IMO. I'd run max of 10 psi on the stock SMIC, 12 psi on the ARC. Even then, it's risking heatsoak on both of those.

[180fan]

oops. good call. yeah should take what you're throwing at it without a problem. The ARC smic can run a bar all day.

[Nismo_Freak]

The ARC sidemount will hold 14psi well. It was designed to operate at 1 bar of boost pressure for those looking to not upgrade to a FMIC.

Stock injectors (370's), and MAF max out around 270rwhp of power.

If you are running an S13 black top engine then you do not need to worry about upgrading injectors or MAF's on the stock turbo.

If you are running an S14 engine then you should bump up to 550's and a Z32 MAF on stock turbo at 1 bar as you will run outta injector and MAF resolution.

440's are Skyline GTR injectors and are top-feed, you need a side-feed injector.

[Spins]

yeah the injectors are listed as new nismo 440 sr20det. but that could mean for use with a different fuel rail. they are on ebay

[Spins]

Ok so I need 550 sidefeed injectors. Is there any other car I can source them from? And what should I be paying for them? Ballpark. I searched.

[180fan]

I usually see new sets of 550cc injectors run from 400-500. Used sets a bit less. Check out ebay for those or Phase2 or HT or Enjuku if you don't want to deal with ebay dudes.

[toledo240]

I wouldn't worry about upgrading injectors unless you go bigger turbo, your stock ones are still efficient enough for 14psi. s15 480's injectors are cheaper than 550's and thats is good enough to run t28's

[Spins]

I was told not to run more than12psi on the stock injectors with the s14 t28. Sometimes I have a lean tip in according to my afr gauge/ then it swings to rich. The rear bumper around my exhaust is blk. I hate that. So I think at least at wot its richy rich.
Modified by Spins at 1:11 AM 9/7/2004

[Nismo_Freak]

I wouldn't worry about upgrading injectors unless you go bigger turbo, your stock ones are still efficient enough for 14psi. s15 480's injectors are cheaper than 550's and thats is good enough to run t28's

Not on a T28 ... the injectors are well over their operational duty cycles at 14psi. That's why Nissan upgraded to 480's on the S15's.

If you want a set of new Nismo 555's they are $488 shipped from SPL Parts (www.splparts.com), you can give me a call sometime this week about them if you'd like. Our number is 1-866-SPL-PART

[Spins]

Thanks, Yeah thats what I have been told. that i need bigger injs. But I will need a safc 2 to run them correctly. I'm running a s13 maf. Does anyone know if a sr20det s14 maf is bigger. My swap came with a s15maf which didnt simply plug in. they replaced it with a s13 240 maf. Thats what I'm running now.

[Nismo_Freak]

You should move up to a Z32 MAF as well as the larger injectors.

[hokiruu]

As far as I know, he S14 MAF isn't much better, if at all, than the s13. Oh, and I know I am splitting hairs here, but 1 bar is actually 14.7 psi. Hehe, hey those .2 bar add up when you're at 102% injector duty cycle