Jump to content
SAU Community

How Much Power Can Jdm S15 480cc Injectors Support

mattysaidso

By mattysaidso,
in Engines & Forced Induction

 Share

Recommended Posts

mattysaidso Experienced

mattysaidso

Posted
Posted

hey

just need to know how much power JDM S15 injectors (480cc) will support on a rb25det? without upgrading the FPR.

ive got a hks 2835 pro s kit goin on and need to be certain these injectors will do the job as i do not want to have to upgrade later on.

thanx in advance

matty

mattysaidso Experienced

mattysaidso

Posted
  • Author
Posted

cheers guys thats all i needed to know.

usmair

bought the kit through cj motor on ns.com, although i think these kits have gone up a bit in price due to the sliding aus dollar. installing myself.

matty

Cubes Grand Master

Cubes

Posted
Posted

My GTR injectors were basically maxed out at 260rwkw as were a mates. BUT that was with them running an RB20DET fuel pressure reg so likely the GTR reg runs a little more base pressure.

Mine flowed 480cc at 40psi.

Adj. fuel pressure reg and a 1 point afr drop when idling has now seen them touch 300rwkw.

H@ME Mentor

H@ME

Posted
Posted

i looking for injectors for my set up (mods in sig) as afr are way out pfc hasn been tuned but i was thinking i should get injecotrs n pump. i was told not to get s15 injectors but to go 660cc + and a bosch 044.

  • 5 months later...
SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

sorry to dig this up...

but i take it Nismo 480cc injectors will do whatever S15 480cc injectors do? Does the fact that the Nismo's have that 4 hole spray pattern make any difference?

and i take it from this thread, to get to 300rwkw, i'll definitely need an adjustable fuel pressure regulator?

bradsm87 Proficient

bradsm87

Posted
Posted
sorry to dig this up...

but i take it Nismo 480cc injectors will do whatever S15 480cc injectors do? Does the fact that the Nismo's have that 4 hole spray pattern make any difference?

and i take it from this thread, to get to 300rwkw, i'll definitely need an adjustable fuel pressure regulator?

Nismo don't do side feed 480cc injectors. The only 480's they do are for the neo engines which use totally different injectors. Yes S15 injectors have 4 holes. Yes you will need to up the fuel pressure a bit to safely hit 300.

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

i have Nismo 480cc's at the moment, and just wanted to know if they could get to 300rwkw

and how safe is running an adj FPR with the 480cc's, compared to running bigger injectors? Unfortunately if i go up in size, then i lose the nice spray pattern of the nismo's because from nismo, 480cc is my only option. And good luck finding some blitz injectors at a decent price (525cc or there-abouts)

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

^ :P:( that's a lot of power... i think i will be just a tad shy of that :( but how is that even possible? Isn't the rough calculation 480cc on a six cylinder enginer = ~480hp, which is ~350'is kw's, which is about 300-310rwkw? (40-50kw drive train loss)?

Ok, i'll keep the injectors then :) But i'll still need an adj FPR at least. I take it Nismo would be the choice for an adj FPR?

Is it ok to get a second hand FPR? I recently got a Z32, but spent the extra money to get a new one because i was advised you never know about a second hand one. Is that a similar issue for a second hand FPR? better off going new or it doesn't matter for fpr's?

thanks guys!

SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted

hahaha. fair point.

well i want to keep things safe, so i'll keep the 480's and get an adj FPR - unless it's a million times safer to get bigger injectors that is...

second hand Nismo FPR would be ok for the job? or too risky to go second hand?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • QB6SAGR
      Tein Circuit Master- rebuild worth it?

      By QB6SAGR · Posted

      Thanks guys,  Yeah I should at least have them dynoed, at least then I know what I've got as a starting point.  The springs on these are hard as rocks. I vaguely remember Russman saying he was going to sell the shocks to me with the rocks fitted, as he was keeping the softer springs for his new setup.  I didn't click at the time but of course that was to let me know the shock/spring wouldn't be matched.  I also remember pricing up new springs around 2014-15, but, house, money etc. it never happened. So that was another reason to have them rebuilt. I have rebuilt the forks on many motorcycles so I think I could handle the seals on these easily enough, but getting the valving right would be a rabbit hole I cbf exploring.  Duncan, interesting to hear RP was tuning these back then. I might give them a call.  In the mean time I have been busy fitting sway bars. The Whiteline rear sway bar I purchased 15 years ago finally got fitted, along with the Whiteline front bar that showed up last week. Just waiting on new links for the front sway bar to finish that off.  And my spare set of advan AVS VS5's should be back from the powder coaters in a Pearl White finish sometime this week, with a set of Hankook RS4's lined up for fitting.  And then I just have all the suspension bushes to do. A comprehensive kit is on the way... Lots to do before the Ararat hill climb. Cheers guys 🍻   
    • funkymonkey
      Howdy Y'all

      By funkymonkey · Posted

      Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Dose Pipe Sutututu
      Starting again

      By Dose Pipe Sutututu · Posted

      Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Thank you so much for the help
    • GTSBoy
      Speed Sensor replacement

      By GTSBoy · Posted

      Yes it is ATF. I quote @Duncan "it takes a good synthentic auto trans fluid like Castrol Transmax Z" It's not a diff. It's a transfer case. Totally different thing. Yes, fluid will come out the sender hole. No you do not really need to drain it. Just pull the old, quickly poke the new, clean up and top up. But realistically, you should probably take the opportunity to change it anyway.
×
×
  • Create New...