DMS-TECH

Holley

Flow

Rating @

.42 BSFC - Est. HP Duty Cycle

.47 BSFC - Est. HP Duty Cycle

.52 BSFC - Est. HP Duty Cycle

.57 BSFC - Est. HP Duty Cycle

Part Number

lbs/hr

cc/min

PSI

BARS

80%

95%

80%

95%

80%

95%

80%

95%

Impedance

Application

522-140X

14.0

147.1

2.96

26.7

31.7

23.8

28.3

21.5

25.6

19.6

23.3

High

522-190X

19.0

199.7

2.96

36.2

43.0

32.3

38.4

29.2

34.7

26.7

31.7

High

522-240X

24.0

252.2

2.96

45.7

54.3

40.9

48.5

36.9

43.8

33.7

40.0

High

522-300X

30.0

315.3

2.96

57.1

67.9

51.1

60.6

46.2

54.8

42.1

50.0

High

522-360X

36.0

378.4

2.96

68.6

81.4

61.3

72.8

55.4

65.8

50.5

60.0

High

522-420X

42.0

441.4

2.96

80.0

95.0

71.5

84.9

64.6

76.7

58.9

70.0

High

522-500X

50.0

525.5

2.96

95.2

113

85.1

101

76.9

91.3

70.2

83.3

High

522-550X

55.0

578.1

2.96

104

124

93.6

111

84.6

100

77.2

91.7

Low

522-650X

65.0

683.2

2.96

123

147

110

131

100

118

91.2

108

Low

522-750X

75.0

788.3

2.96

142

169

127

151

115

137

105

125

Low

522-850X

85.0

893.4

2.96

161

192

144

171

130

155

119

141

Low

522-950X

95.0

998.5

2.96

181

214

161

192

146

173

133

158

Low

X in the Part Number = 1, 4, 6, or 8 and is equal to the number of injectors that are in the kit.

The flow rates shown are at 100% duty cycle (static) and are for gasoline.
Although we do show some rating pressure most injectors are designed to operate 36.25 PSI / 2.5 BAR and 43.5 PSI / 3 BAR - Chrysler and Porsche some times use 55 PSI / 3.7 BAR
Remember this is a pressure differential across the injector, this becomes important in turbo/supercharged engines.
They need to use a regulator that increases pressure as the boost increases.
Injectors are rated at "X" psi, but most will work and flow more fuel at a higher pressure.
There is a calculator on the main page to convert flow numbers from one fuel pressure differential to another.
Fuel pump flow decreases as the pressure goes higher, so make sure your fuel pump has enough flow at the pressure you raise it to.
Estimated Horsepower figures are calculated at 80% duty cycle and 95% duty cycle also based on BSFC (Brake Specific Fuel Consumption).
    .42 BSFC - Race Engine
    .47 BSFC - Hi Performance Engine
    .52 BSFC - Stock or with Light Modifications Engine
    .57 BSFC - Supercharged / Turbo Charged Engine
Electronic fuel injectors come in two types Low (1-5 ohms) and High (12-16 ohms) Resistance (Impedance). NOTE this can be measured between the 2 pins with a multi-meter.
Like with other engine parts Bigger is not always better.

These numbers have come from various magazines, web sites, and manufactures catalogs.