As far as USDM model cars go only two have used 370cc sidefeed injectors, the Q45 and Z32 300zx. Both models use 'phase one' and 'phase two' injectors depending on the model years. The 'phase one' injectors will NOT fit into stock SR/KA fuel rails and you need to be careful when buying/looking for these injectors, not all 370cc injectors are the same.
What should you be looking for when in a junkyard looking for 370cc replacement injectors? Later model 300zx switched over to the 'phase two' injector styles and are identified by the clip and a purple color injector. 'Phase two' injectors use a push style clip and not the earlier slide on plug with the U style retaining clip.
Also for the Q45, look for cars with the big chrome grill, these will have the tan/grayish top 370cc injectors that will also work in stock SR/KA fuel rails, you will need to remove the intake manifold to get at all of the injectors so expect to spend some time removing that but the effort is worth the pull, you end up with two sets of 370cc injectors.
Phase one injectors look like this:
Note the retaining mechanism, slide on plug with metal retainer!
Phase two injectors look like this:
Note that this style uses a built in plastic locking clip in the injector plug its self.
As for the red 259cc injectors you can find in almost any 90's nissan(sentra,maxima,G20,NA 300ZX) they will not supply much fuel other than about 180whp before you start to max them out.
TLDR:
-Phase two 300xzTT
purple
tops are
370cc and will fit into a SR/KA fuel rail just fine
-Phase two Q45
tan tops are
370cc and will fit into a SR/KA fuel rail just fine
-KA24DE,SR20DE,VG30DE are
red top and
259cc and will fit into stock fuel rails just fine
-Q45 and 300zx
phase one injectors will
NOT fit into a stock fuel rail and will NOT plug into a stock KA/SR harness.
Also for future reference:
Quote:
Originally Posted by Andreas Miko
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This is a conservative rating at 3 bar. * indicate side feed or top feed inj 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 Nissans with Fuel Presure 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 inj 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 emmisions station becasue of better fuel atomization.
All Nissan Side feed injs are high impedence
For Low Impedance injs use 6.8 ohms 10 watt resister
The GTIR 444cc Inj is low impedence
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
VR38DETT = 555cc 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
---------------------------------------------185 cc @ 4 bar = 142 WHP
231 cc = 156 WHP
259 cc = 175 WHP * Red SR20DE
---------------------------------------------259 cc @ 4 bar = 203 WHP
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 = 305 WHP * Brick Brown SR20DET ( S15 )
---------------------------------------------444 cc @ 4 bar = 351 WHP
462 cc = 312 WHP
509 cc = 342 WHP
555 cc = 373 WHP * Yellow
---------------------------------------------555 cc @ 4 bar = 423 WHP
570 cc = 380 WHP * BLUE R35 GTR
---------------------------------------------570 cc @ 4 bar = 440 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 = 240 WHP * GREEN SR20VE 20V P12
444cc = 299 WHP * YELLOW RNN14 GTIR
444cc = 299 WHP * YELLOW SR20VET
570cc = 380 WHP * BLUE R35 GTR
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
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