Injector Sizing and Locater page

First here's a calculator for getting an idea of what size of injector you need

If this calculator doesn't work you may have to click on the yellow Windows Bar above and allow it to use ActiveX

Fuel Injector Size Calculator
Engine Horse Power(1):
BSFC(2):
Number of Injectors:
Injector duty cycle(3):
Flow Rate: Lb/Hr     cc/min

* NOTE: Unless otherwise noted, all injector flow rates are calculated at a fuel pressure of 43.5 PSI (3 BAR).
(1) Whenever possible, use actual dyno results for engine horsepower.  If no dyno results are available, consult with your engine builder for a horsepower estimate.
(2) BSFC is usually a number between 0.4 and 0.7 for gasoline engines.  Although BSFC can be estimated, it is best to determine an actual number on a dyno.  If a dyno is not available, the following numbers can be used as a rule of thumb:

  • For naturally aspirated engines, estimate BSFC to be 0.4 to 0.5
  • For nitrous engines, estimate BSFC to be 0.5 to 0.6
  • For forced induction, estimate BSFC to be 0.6 to 0.7
  • For rotary engines, estimate BSFC to be 0.6 to 0.7
  • For engines running methanol, double the appropriate gasoline BSFC (e.g. a forced induction methanol engine has a BSFC between 1.2 and 1.4)

(3) Injector duty cycle should be 0.8 (80%) or LESS.  Numbers higher than 80% are generally NOT RECOMMENDED.  If maximum injector duty cycle is not known, use 0.8 as an estimate.

To calculate the horsepower capacity of injectors based on their flow rating:

Fuel Injector Maximum HP Capacity Calculator
Injector flow rate: lb/hr
Number of injectors:
BSFC:
Fuel Injector Max HP*:

*NOTE:  This formula calculates the maximum horsepower that fuel injectors in proper working order can produce. This formula WILL NOT be accurate if the fuel injectors in question are damaged, clogged, or modified.  This formula will also be inaccurate if the rest of the fuel system cannot produce enough pressure and volume to supply the injectors.  All calculations  should be made at 43.5 PSI unless otherwise noted.

 

Here is a list of factory cars and their injector sizes

and below that is a list of companies that sell injectors

 

       
YEARS MODELS ENGINE SIZES INJECTOR SIZE
1988-94 Tempo, Topaz 2.3L 14 lbs./hr

1991

 Escort, Tracer 1.9L 14 lbs./hr
1987-90 Mustang 2.3L 14 lbs./hr
1986-98 Taurus, Sable 3.0L exc. SHO & FFV 14 lbs./hr
1988-90 Taurus, Sable 3.8L 14 lbs./hr
1990-92 Probe 3.0L 14 lbs./hr
1992-94 Tempo, Topaz 3.0L 14 lbs./hr
1988-90 Thunderbird, Cougar 3.8L 14 lbs./hr
1986-89 Thunderbird, Cougar 5.0L 14 lbs./hr
1986-91 Crown Vic, Grand Marquis 5.0L 14 lbs./hr
1991-93 Mustang 2.3L 15 lbs./hr
1992-96 Escort, Tracer 1.9L 15 lbs./hr
1994-98 Mustang 3.8L 15 lbs./hr
1989-95 Taurus, Sable 3.8L 15 lbs./hr
1991-95 Thunderbird 3.8L 15 lbs./hr
1991 Cougar 3.8L 15 lbs./hr
1996-97 Thunderbird 3.8L 15 lbs./hr
1986-95 Mustang 5.0L 19 lbs./hr
1991-93 Thunderbird 5.0L 19 lbs./hr
1991 Cougar 5.0L 19 lbs./hr
1994-95 Taurus 3.8L Police 21 lbs./hr
1996-98  Mustang 4.6L SOHC 21 lbs./hr
1992-97  Crown Vic 4.6L SOHC 21 lbs./hr
1992-97  Grand Marquis 4.6L SOHC 21 lbs./hr
1991-94  Lincoln Town Car 4.6L SOHC 21 lbs./hr
1993-95  Mustang Cobra 5.0L, Cobra R 5.8L 26 lbs./hr
1993-98  Lincoln Mark VIII 4.6L DOHC 26 lbs./hr
1993-98  Lincoln Continental 4.6L DOHC 26 lbs./hr
1996-98  Mustang Cobra 4.6L DOHC  26 lbs./hr
1989-90  Thunderbird SuperCoupe 3.8L 30 lbs./hr
1989-90  Cougar XR-7 Supercharged 3.8L 30 lbs./hr
1991-93 Thunderbird SuperCoupe 3.8L 32 lbs./hr
1991 Cougar XR-7 Supercharged 3.8L 32 lbs./hr
1994-95 Thunderbird SuperCoupe 3.8L 36 lbs./hr
Ford / Mazda Trucks  
1998 Ranger 2.5L 14 lbs./hr
1998 B2500 2.5L 14 lbs./hr
1985-94 Ranger 2.3L 14 lbs./hr
1994 B2300 2.3L 14 lbs./hr
1986-87 Aerostar 2.3L 14 lbs./hr
1986 Bronco II 2.3L 14 lbs./hr
1986-92 Ford Ranger / Bronco II 2.9L 14 lbs./hr
1991-97 Ranger 3.0L 14 lbs./hr
1994-97 B3000 3.0L 14 lbs./hr
1986-97 Aerostar 3.0L 14 lbs./hr
1987-89 Ford E-250 Truck 4.9L 14 lbs./hr
1987-91 Ford E-, F- Series Trucks 4.9L 14 lbs./hr
1995-98 Windstar 3.0L 14 lbs./hr
1995-97 Ranger 2.3L 15 lbs./hr
1995-97 B2300 2.3L 15 lbs./hr
1990-96 Ford E-, F- Series Trucks 4.9L 15 lbs./hr
1995 Windstar 3.8L 15 lbs./hr
1990-92 Ranger 4.0L 21 lbs./hr
1991-92 Explorer 4.0L 21 lbs./hr
1991-92 Navajo 4.0L 21 lbs./hr
1990-95 Aerostar 4.0L 21 lbs./hr
1996-98 Windstar 3.8L 21 lbs./hr
1985-96 Ford E-, F- Series Trucks 5.0L 21 lbs./hr
1988-96 Ford E-, F- Series Trucks 5.8L 21 lbs./hr
1996-99 Ford E-, F- Series Trucks 4.6L 21 lbs./hr
1996-99 Expedition 4.6L 21 lbs./hr
1996-99  Ford E-, F- Series Trucks 5.4L 21 lbs./hr
1998 Expedition, Navigator 5.4L SOHC 21 lbs./hr
1988-91 Ford E-, F- Series Trucks 7.5L 24 lbs./hr
1992-97 Ford E-, F- Series Trucks 7.5L 26 lbs./hr
GM Cars  
1985-90 Celebrity 2.8L 15 lbs./hr
1985-92 Camaro / Firebird 2.8L / 3.1L 15 lbs./hr
1985-86 Cavalier, Citation 2.8L 15 lbs./hr
1990-94 Lumina 3.1L 15 lbs./hr
1990-93 Corsica / Beretta 3.1L 15 lbs./hr
1991-94 Cavalier 3.1L 15 lbs./hr
1985  Skylark 2.8L 15 lbs./hr
1989-93 Century, Skylark 3.3L 15 lbs./hr
1987-89 Century, Regal 2.8L 15 lbs./hr
1989-93 Regal 3.1L 15 lbs./hr
1985-86 Cimarron 2.8L 15 lbs./hr
1989-93 Achiva, Calais, Ciera 3.3L 15 lbs./hr
1985-87 Firenza 2.8L 15 lbs./hr
1988-93 Cutlass Supreme 2.8L / 3.1L 15 lbs./hr
1986-89 Ciera 2.8L 15 lbs./hr
1991-94 Sunbird 3.1L 15 lbs./hr
1992-93 Grand Am 3.3L 15 lbs./hr
1987-93 Grand Prix 2.8L / 3.1L 15 lbs./hr
1986-91 6000 2.8L / 3.1L 15 lbs./hr
1985-86 Fiero 2.8L 15 lbs./hr
1993-95 Camaro / Firebird 3.4L 17 lbs./hr
1994-96 Corsica / Beretta 3.1L 17 lbs./hr
1995-99 Lumina / Monte Carlo 3.1L 17 lbs./hr
1997-99 Malibu 3.1L 17 lbs./hr
1994-98 Century, Regal, Skylark 3.1L 17 lbs./hr
1994-98 Achiva, Ciera 3.1L 17 lbs./hr
1993-97 Cutlass Supreme 3.1L 17 lbs./hr
1997-98 Cutlass 3.1L 17 lbs./hr
1994-99 Grand Prix, Grand Am 3.1L 17 lbs./hr
1995-99 Camaro / Firebird 3.8L 19 lbs./hr
1985-92 Camaro / Firebird 5.0L TPI 19 lbs./hr
1991-95 GM Series I Supercharged 3.8L 21 lbs./hr
1991-93 GM 3.4L DOHC (X) 215hp 21 lbs./hr
1986 Corvette 5.7L iron head 21 lbs./hr
1989-91 Corvette 5.7L exc. ZR-1 21 lbs./hr
1989-92 Camaro / Firebird 5.7L TPI 21 lbs./hr
1985 Corvette 5.7L TPI 24 lbs./hr
1986 Corvette 5.7L Aluminum head TPI  24 lbs./hr
1987-88 Corvette 5.7L TPI 24 lbs./hr
1987-88 Camaro / Firebird 5.7L TPI 24 lbs./hr
1992-93 Corvette 5.7L LT-1 24 lbs./hr
1993 Camaro / Firebird 5.7L LT-1 24 lbs./hr
1994-96 Corvette 5.7L LT-1 26 lbs./hr
1994-97 Camaro / Firebird 5.7L LT-1 26 lbs./hr
1995-96 Impala SS & Full size 5.7L LT-1 26 lbs./hr
1996 Corvette 5.7L LT-4 26 lbs./hr
1996-97 Camaro / Firebird 5.7L LT-4 26 lbs./hr
1984-85 Buick 3.8L Turbo 30 lbs./hr
1986-87 Regal, GN 3.8L Turbo 30 lbs./hr
1989 Trans Am Turbo 30 lbs./hr
GM Trucks  
1991-93 GMC Syclone/Typhoon 4.3L Turbo 30 lbs./hr
European Cars  
1992-94 VW Corrado 2.8L VR-6 21 lbs./hr
1993-96 VW Jetta 2.8L VR-6 21 lbs./hr
1993-97 VW Passat 2.8L VR-6 21 lbs./hr
1994-96 VW Golf 2.8L VR-6 21 lbs./hr
1994-97 Porsche 993 Carrera 3.6L 24 lbs./hr
1995-97 Porsche 993 Carrera 3.6L Twin-Turbo 40 lbs./hr

 

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