Fuel injectors

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Flow

Injector Rated flow 2 bar 3 bar 3.5 bar 4 bar 5 bar Spray pattern Length Connector
Siemens S4 33# 349cc/33# 390cc/37# 52mm EV1
Bosch Bluetop 36# 380cc/36# 422cc/40# 490cc/47#
RS4 46# 480cc/46# 538cc/51# 15° dual
Greentop 42# 475cc/45# 550cc/52# 615cc/59# 15° single 2 1/2"
Green Giant (Volvo) 42# 450cc/43# 520cc/50# 580cc/55# 15° dual 2 1/2"
Delphi 37# 391cc/37# 462cc/43#
38# 399cc/38# 462cc/44#
42# 441cc/42# 515cc/49#
50# 525cc/50# 609cc/58# 22.4° wide
Siemens Deka IV ('03 SRT4) 41#? 452cc/41#? 524cc/47#? Dual? 52mm EV6
Deka IV ('04 SRT4) 45# 475cc/45# 546cc/52# Dual? 52mm
Deka ID (3172) 55# 599cc/57# 15° single 2 1/2" EV1
Deka IV (1496) 60# 514cc/49# 630cc/60# 727cc/70# 30.0° wide 2 1/2"
Genesis 415cc 415cc/39# 483cc/46# Dual 52mm
430cc 430cc/41# 494cc/47# Dual 52mm EV6
550cc 550cc/52# 580cc/55# 635cc/60# Dual 52mm

Adaptors

Shape Bosch Comment
EV1 Rectangle Design II Minitimer
EV6 Oval Design III USCAR

Injectors are male, harness is female.

File:USCARR-Bosch-inj-adaptor.jpg
USCARR to Bosch fuel injector adaptors

http://www.fiveomotorsport.com/Injector_CONNECT.asp

Note that 2 1/2" injectors require 12mm (7/16") spacers.

Conversions

  • 1 lb/hr gasoline = 10.5 cc/min (@720 kg/m3) (1 (pound / hr)) / (720 (kg / (m^3)))
  • Density of typical test fluid = 760 - 770 kg/m3
    1 lb/hr = 9.81 - 9.95 cc/min
  • Density of n-heptane = 685 kg/m3
    1 lb/hr = 11.0 cc/min
  • 3 bar = 43.5 psi
  • 4 bar = 58.0 psi
  • 5 bar = 72.5 psi
  • RC Engineering's online calculator
  • 52mm = 2 1/16"
  • 2 1/2" = 64mm

Instrument cluster

If you change fuel injectors, your instrument cluster will estimate your fuel consumption incorrectly. Use VAG-COM to adjust it by going to Instrument cluster (17) -> Adaptation (10) -> Channel (03).

Unfortunately, you can only set it to a maximum of 115%. Default is 100%.

References