I found this and thought i would share it with you as its a much asked Question. This is a conservative rating at 3 bar. * indicate side feed injector sizes that can be bought from Nissan, Nismo or Tomei. Alot of the sizes you can not get but are there to help you if you are looking at a cetain flow rate by going to 4 bar. 3 BAR = 44 PSI, All the Nissan's with Fuel Pressure Regulators operate at 3 bar. 4 BAR = 59 PSI Running at 4 bar is better than running at 3 bar. Here is why, you can get more WHP from your injector at 4 bar, there is no xtra cost for a 4 bar program from JWT, you get better drivability at 4 bar because of better fuel atomization and you car will do better at the emissions station becasue of better fuel atomization. All Nissan Side feed injs are high impedence For Low Impedance injectors use 6.8 ohms 10 watt resister The GTIR 444cc Inj is low impedance 91-99 USDM SR20DE = 259 cc side feed injs 00-02 USDM SR20DE RR = top feed injs U12, U13, W10 and W11 SR20DET = 370 cc Side Feed injs Pulsar GTIR SR20DET = 444 cc Top Feed injs S13 and S14 RWD SR20DET =370 cc Side Feed injs S15 RWD SR20DET = 444 cc Side Feed injs SR20VET = 444cc Top Feed SR20VE 20V = 350cc Top Feed Side Feed Injs 23 cc = 16 WHP 46 cc = 31 WHP 93 cc = 63 WHP 139 cc = 94 WHP 185 cc = 125 WHP * Pink GA16 231 cc = 156 WHP 259 cc = 175 WHP * Red SR20DE 278 cc = 187 WHP 324 cc = 218 WHP 333 cc = 226 WHP * Grey SR20VE ---------------------------------------------333 cc @ 4 bar = 261 WHP 370 cc = 250 WHP * Purple SR20DET ---------------------------------------------370 cc @ 4 bar = 290 WHP 416 cc = 281 WHP 444 cc = 299 WHP * Brick Brown SR20DET ( S15 ) ---------------------------------------------444 cc @ 4 bar = 345 WHP 462 cc = 312 WHP 509 cc = 342 WHP 555 cc = 373 WHP * Yellow ---------------------------------------------555 cc @ 4 bar = 423 WHP 601 cc = 405 WHP * Yellow Tomei ---------------------------------------------601 cc @ 4 bar = 457 WHP 647 cc = 436 WHP 692 cc = 468 WHP 740 cc = 500 WHP * Red ---------------------------------------------740 cc @ 4 bar = 580 WHP 850 cc = 570 WHP SARD ---------------------------------------------850 cc @ 4 bar = 660 WHP Nissan Top Feed Injs 350cc = 275 WHP * Green SR20VE 20V P12 444cc = 299 WHP * Yellow RNN14 GTIR 444cc = 299 WHP * Yellow SR20VET MSD Top Feed Injs 36 lb = 250 WHP 50 lb = 355 WHP 72 lb = 520 WHP 96 lb = 690 WHP MSD Injs do not run right at 4 bar so don't try it. 04-07 Subaru STI Yellow Inj 520 cc = 350 WHP
this is a little vauge wot car/engine are these for? as my skyline is running standard injectors at 5bar and i get nearly 400bhp at about 15-16psi of boost.
He means 4cyl. And being wheel figures these are very different from the bullshit flywheel numbers we use in the UK. For a 6cyl the max you gonna get is 1bhp per 1cc, so 440cc inj gets 440bhp, and so on, at the fly. Usually less to be honest as that means fair lean running etc. Id call bullshit on more than that.