Need Help Picking Injectors

[THE_350GT]

Hey guys just after some feedback.

Currently at the stage of buying some injectors for my S2 r33, Current list of mods

HKS FMIS

HKS POD

3" turbo back zust

Walbro fuel pump

Garrett turbo slightly bigger then a T28

Duel Stage boost controller

SAFC 2.

All i have on the car at the moment is the zust, FMIS, pod the rest are to be install.

With some decent injectors could I expect this kind of power or this won’t happen till I buy a Power PC which I’m trying to avoid because of the $$. (also trying to save for a house)

Was thinking NIZMO 750CC????

Thanks

Edited June 9, 2006 by the97skyline

[paulr33]

you havent listed a power target so we cant help.

for any injector changing you need aftermarket ecu, powerfc will do fine.

without knowing any more power requirements

s15 sr20 jdm manual 480cc injectors

nismo 550cc rb25 injectors

both are straight fit and dial in (with the right ECU)

[Tangles]

nismo 550cc rb25 injectors

both are straight fit and dial in (with the right ECU)

How do you mean "dial in with the right ECU"?

Ive got an auto, and with the higherflowing turbo Im going to get (eventually) Im guessing Im going to need injectors - I use a SAFC-2 and an SITC as my piggyback controllers.

[Kaido_RR]

How do you mean "dial in with the right ECU"?

Ive got an auto, and with the higherflowing turbo Im going to get (eventually) Im guessing Im going to need injectors - I use a SAFC-2 and an SITC as my piggyback controllers.

greddy emanger ulimate with injector hardness = best option for an auto skyline

[Tangles]

' date='9 Jun 2006, 01:28 PM' post='2242142']

greddy emanger ulimate with injector hardness = best option for an auto skyline

NUP - no way would that be going on my car, Ive heard nothing but BAD reports about these.

The safc and sitc stay, no discussion...... whats the point of having them installed, tuned and retuned, and then not using them when I go for a larger turbo?

at the end of the day, simply Id like to know: can the safc "utilise" larger than stock injectors (either hiflowed injectors or new Nismo items)?

[THE_350GT]

Sorry target is anything around or over the 250RWK

[Kaido_RR]

NUP - no way would that be going on my car, Ive heard nothing but BAD reports about these.

The safc and sitc stay, no discussion...... whats the point of having them installed, tuned and retuned, and then not using them when I go for a larger turbo?

at the end of the day, simply Id like to know: can the safc "utilise" larger than stock injectors (either hiflowed injectors or new Nismo items)?

so my comment was target directly at you, just saying in general that the greddy is a extremmely good ecu (of course that is if the tuner is good at tuning the ecu)

im not 100% sure if u can run aftermarket ecu with the safc and sitc but you can just buy another addon like you have i know hks,greddy and pivot make one for running aftermarket injectors

[Tangles]

' date='9 Jun 2006, 01:41 PM' post='2242186']

so my comment was target directly at you, just saying in general that the greddy is a extremmely good ecu (of course that is if the tuner is good at tuning the ecu)

im not 100% sure if u can run aftermarket ecu with the safc and sitc but you can just buy another addon like you have i know hks,greddy and pivot make one for running aftermarket injectors

'Nah no worries Michael, thanks for the info (sorry for hijack of thread, after same info as you 97'Line), just that Ive heard too much bad news about the emanage, plus Ive got 2 piggybacks already and dont have much left in my modifying budget allowance. doh (ie to uninstall, sell, buy emanage and harness, then finding an adelaide tuner = too hard & expensive basket)

I'll research into the add-ons that you've mentioned. Cheers

Im after 200-210awkw (4wd auto); have everything ready barring the larger turbo. Not sure if I'll require the bigbadgranddaddy injectors.... currently at around 70% duty using a Nismo adj.FPR.

Good luck with your injecotr choice 97skyline!

Brendan

Edited June 9, 2006 by Tangles

[Sydneykid]

NUP - no way would that be going on my car, Ive heard nothing but BAD reports about these.

The safc and sitc stay, no discussion...... whats the point of having them installed, tuned and retuned, and then not using them when I go for a larger turbo?

at the end of the day, simply Id like to know: can the safc "utilise" larger than stock injectors (either hiflowed injectors or new Nismo items)?

For small injector upgrades the SAFC’s seem to work OK, so 370 cc’s to 440-480 cc’s would be OK. Once you get over that you are past the same limit for standard internals anyway. So you might as well change the inlet to a Greddy and go for top feed injectors, where there is a much larger range at lower prices.

An adjustable fuel pressure regulator (Nismo bolt on, ~$150 from Nengun) will also help the SAFC tuning as you can juggle the fuel pressure to get the target A/F ratios.

cheers

[Tangles]

For small injector upgrades the SAFC’s seem to work OK, so 370 cc’s to 440-480 cc’s would be OK. Once you get over that you are past the same limit for standard internals anyway. So you might as well change the inlet to a Greddy and go for top feed injectors, where there is a much larger range at lower prices.

An adjustable fuel pressure regulator (Nismo bolt on, ~$150 from Nengun) will also help the SAFC tuning as you can juggle the fuel pressure to get the target A/F ratios.

cheers

cheers Gary!

(and thanks to michael for the info on fuelinjectors piggybacks - never knew they existed)

awesome info...... hmm, Im guessing I'll hiflow the standard injectors then, to 450cc's or thereabouts.

What about you 97skyline? which way are you going to go?

[Tangles]

' date='9 Jun 2006, 01:41 PM' post='2242186']

im not 100% sure if u can run aftermarket ecu with the safc and sitc but you can just buy another addon like you have i know hks,greddy and pivot make one for running aftermarket injectors

http://www.hksusa.com/products/?id=638&rsku=4361

wow, not cheap

HKS AIC III Si (Additional Injector Controller) - $800 usd LOL

(edit: used gear can be found on ebay LOL)

Edited June 9, 2006 by Tangles

[THE_350GT]

Yeah sorry i also do have a fuel pressure regulator. So you think that anything over say 470cc with my mods really wont help much as i haven’t done internals. I have a mate with a 200 very similar mods to my car bar a new turbo and he also has a Power FC, got recommended to get at least 555CC, i though skylines being a bigger motor would need bigger ones. Haven't really thought about high flowing the standard ones.

[Tangles]

Yeah sorry i also do have a fuel pressure regulator. So you think that anything over say 470cc with my mods really wont help much as i haven’t done internals. I have a mate with a 200 very similar mods to my car bar a new turbo and he also has a Power FC, got recommended to get at least 555CC, i though skylines being a bigger motor would need bigger ones. Haven't really thought about high flowing the standard ones.

A place in Melbourne do them - APS by memory? anyone wish to confirm?

Also - to Sydneykid...

Gary, youve got a very nice Stagea; once you add your larger turbocharger (GCG hiflow Im sure), tuned with your SAFC and SITC, with your full exhaust and R34 GTT Intercooler - do you expect to have to use larger injectors yourself???

I understand you were aiming for around 200awkw as well.

to the 97skyline - you can get injector controllers off ebay, most look used and are a JuMbLe of wires & leads etc, not tooooo expensive....... but fitting and tuning might be.

[THE_350GT]

A place in Melbourne do them - APS by memory? anyone wish to confirm?

Also - to Sydneykid...

Gary, youve got a very nice Stagea; once you add your larger turbocharger (GCG hiflow Im sure), tuned with your SAFC and SITC, with your full exhaust and R34 GTT Intercooler - do you expect to have to use larger injectors yourself???

I understand you were aiming for around 200awkw as well.

to the 97skyline - you can get injector controllers off ebay, most look used and are a JuMbLe of wires & leads etc, not tooooo expensive....... but fitting and tuning might be.

Why would i need an injector controller though???? is that becuase i don't have a Power FC???

What are people using these days???????? or is everybody just high flowing them

[Tangles]

Why would i need an injector controller though???? is that becuase i don't have a Power FC???

What are people using these days???????? or is everybody just high flowing them

I doubt itd be worthwhile (an injector controller - just posting my research thats all).

To work within Garys parameters that he described, go either the SR20 JDM 480cc, or highflow the standard injectors. Most people prefer to steer clear of highflowing the injectors............. Im not too worried tho. Itd be easier (and cheaper) to highflow to ~450cc then finding 6 x JDM S15 injectors.

[BezerkR32]

750cc are good for 400kw, i use 580cc and make 300kw. bigger injectors are harder to control at idle and on cruise.

Hey guys just after some feedback.

Currently at the stage of buying some injectors for my S2 r33, Current list of mods

HKS FMIS

HKS POD

3" turbo back zust

Walbro fuel pump

Garrett turbo slightly bigger then a T28

Duel Stage boost controller

SAFC 2.

All i have on the car at the moment is the zust, FMIS, pod the rest are to be install.

With some decent injectors could I expect this kind of power or this won’t happen till I buy a Power PC which I’m trying to avoid because of the $$. (also trying to save for a house)

Was thinking NIZMO 750CC????

Thanks

[R31Nismoid]

Hey guys just after some feedback.

Currently at the stage of buying some injectors for my S2 r33, Current list of mods

HKS FMIS

HKS POD

3" turbo back zust

Walbro fuel pump

Garrett turbo slightly bigger then a T28

Duel Stage boost controller

SAFC 2.

All i have on the car at the moment is the zust, FMIS, pod the rest are to be install.

With some decent injectors could I expect this kind of power or this won’t happen till I buy a Power PC which I’m trying to avoid because of the $$. (also trying to save for a house)

Was thinking NIZMO 750CC????

Thanks

The stock injectors supply more than the stock turbo can pump... if its only "slightly" bigger i doubt your on the limit.

Nismo dont make a 750, they are 740cc for the RB25 rail.

Or Nismo 550 or Nismo 555... one of the two for the RB25 again...

If you really need injectors, then the 55x would be my pick with a PowerFC