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Japan Electrical Control Systems formed 1973 as a joint venture of Nissan and Bosch.
Contents |
Injector Sizing
Say the injectors are rated at 3bar (43.5 psi) +-3%. 80% is the normal maximum practical operating capacity. You can get more output by boosting fuel pressure, for example some injectors might be safe at 70lbs pressure.
You need to know the BSFC (Brake Specific Fuel Consumption). For a normally aspirated engine, plan on 0.5 lbs/hour/hp. Put another way, take the HP/2
200 HP / 2 = 100 lbs/hr is the need.
With 4 injectors, they need to be 25 lbs/hr allowing for 80% operation, you should get 30 lbs/hr rated injectors. If you are planning on raising power output later, go up one size to start with.
High or Low Resistance Injectors?
Whether you use High or Low Resistance Injectors depends first on whether your ECS can do both. Get the kind that is compatible.
- Most OEM controllers use high-resistance injectors (saturated driver). injector temperature lower makes it more reliable, which is why the high-impedance design is the most common type from the factory.
- Many aftermarket controllers use low-resistance injectors (peak and hold), which can cycle faster but run hotter
Low impedance injectors with a resistance of 0.5-6 ohms, and high impedance injectors of 6 to 12 ohms
Low Impedance: less than 6 ohms High impedance: 6-12 ohms
You can run low impedence injectors with OEM ECUs by using a dropping resistor.
Compare to Fuel Injectors: High vs. Low Impedance by Hot Rod magazine.
Feed Type
Older Nissan EFI systems use a "hose-feed" style of top-feed injector, where the inlet hose is semi-permanently fixed to the injector.
1975-1978 S30 280Z
1977-1982 B310 A14E/A15E
1988 KN13 Pulsar/Sentra CA16DE
SR: side-feed injectors (most) SR: top-feed injectors (some) CA: top-feed injectors, low impedance RB20: top-feed injectors, low impedance RB25: side-feed injectors
Top-feed means the petrol comes into the top of the injectors, and is sprayed out the bottom. In a side-feed design, fuel enter the side of the injectors and is still sprayed out the bottom. Top-feed allows a simple fuel rail which snaps over the injectors, while side-feed requires a more complex gallery-type fuel rail.
There is no real advantage to side-feed or top-feed, except in manufacturing methods and packaging considerations. Performance-wise, it is more important how much fuel a particular injector flows. To switch from one type to another means changing the entire fuel rail.
Top-feed S13 CA fuel rail
Side-feed S13 SR fuel rail
Side Feed * SR20 * RB * KA24DE * 1995- Z32 VG30DETT All use same dimension injector (usually 370cc)
11mm vs 14mm
Top-feed injectors use either 11mm vs 14mm inlet O-Ring diameter. Which size you need depends on the size of the openings in the fuel rail.
O-Ring size at Fuel Rail * 11mm inlet size * 14mm inlet size
Japan injectors can be either size feed. Likewise, Bosch injectors can be either 11mm or 14mm. There is no performance difference between the two, instead check the fuel-flow rating of the injectors. Switching from one size to the other requires changing the fuel rail, but if you find a bargain set of injectors it may be worth the trouble of switching.
Hi-flo injectors are available in 11 or 14 mm inlet versions, for example you can get 1000cc injectors with 11mm inlets.
Dimension 'A' - injector inlet O-ring
Colors
Wheel HP listed is appropiate power level of the injector set for a conservative tune (not saturating the pulse-width of the injector signal).
Side-feed Injectors 185cc 125whp Pink GA16 259cc 175whp Red SR20DE 333cc 226whp Grey SR20VE 370cc 250whp Purple SR20DET 444cc 300whp Brown SR20DET (S15)
Top-feed Injectors 260cc 175wgp Red CA18DE 370cc 250whp Cream CA18DET 350cc 275whp Green SR20VE 20V P12 444cc 300whp Yellow SR20DET (GTiR), SR20VET
Impedance
High-flow injectors are available in low-impedance or high-impedance designs.
Low Impedance: Below 4 ohms High Impedance: Above 8 ohms
Modern injector designs mean there is no performance advantage to either type. With 1970s-1980s injector designs, the low-impedance injectors had a faster reaction time which enabled better low-speed running.
ECUs that use Saturation signal require an external dropping resistor when used with low-impedance injectors. This includes most factory ECUs. Most aftermarket ECUs can use either high- or low-impedance injectors.
Part Numbers
INJECTOR ASSY-FUEL 16600,16603
16600-05U00
16600-05U00/16600-05U02 [440cc top-feed diversion] * AWC24.RB26DETT,R33.RB26DETT,R32.RB26DETT
16600-0A500
16600-0A500 オートックバージョン シヨウ [K116] <> 16600-91F00 [BROWN, 480cc, side-feed] * S14 *2WS.SR20DET.MT, S15.SR20DET.MT.F6
16600-10Y00
16600-10Y01 [DARK RED, 260cc] * SR20DE: M12,N30,P11,WP11,R11,RB14,S14,S15,U14,W11 * SR18DE: N15 * RB25DE: R33,WC34,C34 * USA B14U.SR20DE,B14X.SR20DE * USA Z32.VG30D
16600-01Y00/16600-01Y01/16600-01Y03 JECS RED 16600-01Y05/16600-01Y10/16600-01Y11 DKC RED [TOP-FEED] * S14.SR20DE,S15.SR20DE,P11.SR20DE,U14.SR20DE * M12.SR20DE,N15.SR18DE,N30.SR20DE,RB14.RB25DE * W11.SR20DE,P11.SR20DE,R11.SR20DE,WP11.SR20DE * R33.RB25DE,WC34.RB25DE,C34.RB25DE * USA KN13 CA18DE Aftermarket * SMP FJ191 * Airtex/Wells 4G1458 * Bosch 62016 red-top, top-feed
16600-10Y01
16603-17M00
16603-17M00 * USA N12.E15ET * B12.E15T,B11.E15ET,N12.E15ET 16603-18F00 * USA S12.CA18ET 16603-18F02 JECS BLACK 16603-18F11 DKC BLUE * USA S12.CA18ET 16603-18F12 DKC BLACK * USA S12.CA18ET AFTERMARKET * Beck/Arnley 1580164 Green-top ** 16600-AA000 * SMP FJ158 Green-top ** 16600-18F14 ** 16600-AA000 ** 16600-37M00/16600-37M05/16600-37M06/16600-37M07/16600-37M10/16600-37M15/16600-37M16/16600-37M17 ** 16603-17M00/16603-17M01 ** 16603-18F00/16603-18F01/16603-18F02/16603-18F11/16603-18F12/16603-18F13/16603-18F14
16600-21U00
16600-21U00 <> 16600-21U01 [PURPLE, 370cc, side-feed] * S14.SR20DET,S15.SR20DET.AT.F4,R33.RB25DET * R33.RB25DET,C34.RB25DET,WC34.RB25DET,C35.RB25DET * USA Z32.VG30DTT
16600-21U01
16600-35F00
16600-35F05 JECS キイロ/YELLOW <> 16600-35F01 <> 16600-35F00 DKC キイロ/YELLOW [330cc???] * S13 CA18D
16600-35F10
16600-35F10 (OPTION) JECS ミドリ/GREEN <> 16600-35F11 <> 16600-35F15 DKC ミドリ/GREEN * S13 CA18D
16600-37M00
16600-37M00 SELECT USE JECS W/BLUE POINT * USA KN13 CA16DE 0986-0887 aftermarket * Airtex/Wells 4G1456 Blue Stripe ** 16600-37M00/16600-37M05/16600-37M06 * MP4209 Bostech
16600-37M10 SELECT USE JECS W/BLACK POINT * USA KN13 CA16DE 0986-0887 * Airtex/Wells 4G1455 Black Stripe ** 16600-37M07/16600-37M10/16600-37M15/16600-37M16 * SMP FJ131 Black * AcDelco 2171887 BLACK
MP4209
16600-40F00
RED top feed 16600-40F00/16600-40F01/16600-40F05 16600-40F10/16600-40F12/16600-40F15/16600-40F16 USA models * S13 1989-1990 240SX.KA24E * 1990 Axxess KA24E * 1990 Maxima 3.0 * 1990 Pulsar NX XE 1.6 * 1990 Sentra 1.6 * 1990 Stanza 2.4
16600-40F01
16600-50F00
16600-50F00 センタク シヨウ キイロ/SELECT USE YELLOW <> 16600-50F02 * RS13, S13
16600-50F10 センタク シヨウ ミドル/SELECT USE GREEN <> 16600-50F12 [380cc, side-feed] * RS13, S13
16600-52F00
16600-52F00 センタク シヨウ ミドル/SELECT USE GREEN <> 16600-52F02 * S13 SR20D, RS13 SR20DE
16600-54C00
16600-54C00/16600-54C02 [440cc top-feed diversion, 2.0 ohm] * AWC34.RB26DETT,R34.RB26DETT * N14.SR20DET
16600-56E00
16600-56E00 JECS <> 16600-56E01 <> 16600-56E05 DKC [370c, top-feed, 2.6ohm] * RS13/S13 CA18DT, U12 CA18DT * white top
16600-52F10 センタク シヨウ ミドル/SELECT USE GREEN <> 16600-52F12 * S13 SR20D, RS13 SR20DE
16600-56E00
16600-5L700
16600-5L700 grey top feed Bosch Grey top feed, high impedance, 365cc $40 Rockauto * Maxima Pathfinder 350Z 2.0L 3.0L 3.5L 4.5L * Infiniti * Subaru Impreza, Forester * JAPAN Primera SR20DE * USA Sentra 2000-2002 SR20DE 16611AA350 HITACHI FIJ0020
16603-N7616
B310.A14E+A15E EGI
Nissan 16603-N7616 GREEN JECS A46-000001 * Top Feed * 2.4 ohms low impedance * 182.9 g/m heptane @ 3 bar * 188 cc/minute (good for up to 115 HP)
Injector Assembly 16603-N7616 INJECTOR $133.33 USD > 16439-N4710 > * BOSCH 0 280 150 166 * JAGUAR EAC1851 includes: * 16449-Y8000 HOSE-INJECTOR L=53 -7909 $14.23 USD * 16604-N7615 HOSE-INJECTOR 7910- $14.82 USD * 16439-53A00 CLAMP-HOSE $2.38 USD Replaced: * 16603-Y8005 INJECTOR ASSY -7804 L=53 * 16603-N7600 INJECTOR ASSY 7805-7909 JECS L=51 * 16603-N7610 INJECTOR ASSY 7910- DKC L=51 * 16603-N7660 INJECTOR ASSY 7910- BOSCH L=51 * 16603-V0100 INJECTOR ASSY 7910- JECS L=51
CA-Series
CA18DE - YELLOW OR GREEN high power engines CA18DE - RED low power engines CA18DET - WHITE
16600-35F05 JECS キイロ/YELLOW <> 16600-35F01 <> 16600-35F00 DKC キイロ/YELLOW * S13 CA18D 16600-35F10 (OPTION) JECS ミドリ/GREEN <> 16600-35F11 <> 16600-35F15 DKC ミドリ/GREEN * S13 CA18D
CA18DET 16600-56E00 JECS <> 16600-56E01 <> 16600-56E05 DKC * RS13/S13 CA18DT, U12 CA18DT
SR-Series
SR20DE 16600-52F10 センタク シヨウ ミドル/SELECT USE GREEN <> 16600-52F12 * S13 SR20D, RS13 SR20DE 16600-52F00 センタク シヨウ ミドル/SELECT USE GREEN <> 16600-52F02 * S13 SR20D, RS13 SR20DE SR20DET 16600-50F00 センタク シヨウ キイロ/SELECT USE YELLOW <> 16600-50F02 * RS13, S13 16600-50F10 センタク シヨウ ミドル/SELECT USE GREEN <> 16600-50F12 * RS13, S13
Bosch Grey top feed, high impedance, 365cc * JAPAN Primera, USA Sentra 2000-2002
RB-series
440cc
Dropping Resistor
Resistor pack/resistor box can be obtained from the wreckers from a Nissan Pulsar or Silvia/180SX/240SX. Or any other 1980s 4-injector EFI Nissan.
See main article: Dropping Resistor
