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How Much Power Can Jdm S15 480cc Injectors Support

mattysaidso

By mattysaidso,
in Engines & Forced Induction

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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?

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