Power Boost Valve

HOW DOES THE POWER BOOST VALVE WORK?

The Power Boost Valve is a high performance tuning part which replaces the original equipment valve (fitted to the vehicle). 
A range of models are available to suit a wide variety of European cars, which almost certainly includes yours.  We are continually developing new designs to expand the number of applications.
We outline the benefits of the Power Boost Valve by drawing a comparison evaluation:
Ref:  Original Equipment Fuel Pressure Control Valve
The electric fuel pump supplies fuel at a high pressure to the fuel rail and injectors, which is then regulated by a fuel pressure control valve.   Typically, the regulator is not adjustable and is pre-set to a 3 bar maximum pressure.  At idle the fuel pressure valve reduces it by 0.5 bar approximately to 2.5 bar.  When accelerating quickly from standstill the fuel pressure increases at a proportional rate retaining a lean fuel mixture strength as required by the E.E.C. for new vehicles.  However, the resultant effects of the standard valve produce:

• lethargic throttle response

• occasional drivability problems at slow traffic speeds

• intermediate performance 'flat spots' when accelerating

By comparison:
Ref:  Power Boost Valve (replacement)
Firstly, this valve has an adjustable fuel pressure, effected by the movement of an adjustment screw on the crown of the unit.
New Power Boost Valves are pre-set with a maximum fuel pressure of 2.5, 3.0 or 3.5 bar, depending on the vehicle in question, and similarly (to the original valve) the fuel pressure is reduced by 0.5 bar approximately at idle.   There the similarities end.
On acceleration from standstill the Power Boost Valve fuel pressure will increase at 1.7 times the standard rate.  This will produce a healthy, strong fuel mixture strength which will instantly improve the drivability of your vehicle, providing:-

• instant throttle response

• removal of performance flat spots

• faster acceleration

• extra engine performance

The regulator enhances engine performance on acceleration by enriching the mixture strength.  On constant throttle and cruise conditions the valve returns to a normal regulator function.
The Power Boost Valve is simple to install and in most instances basic fitting instructions are provided.  These units are mechanical and are considered maintenance free.
We thank you for your interest in our products and hope that this bulletin provides you with enough information to answer any questions when making a purchase.

COMPETITION USE ENQUIRIES
The same range of regulators will be utilised when used on a competition engine and, for customers using competition fuel lines, a special regulator with a JIC (-6) male fitting has been prepared should one be required.   Fuel pressure adjustment can be effected in seconds to reduce delays.

318i E30

83-94

VK-384-18-H

£90.65

320i E30

82-94

VK-384-18-H

£90.65

323i E30

82-94

VK-384-18-H

£90.65

3 Series M3 2.3

86-94

VK-384-18-H

£90.65

3 Series M3 Evolution I/II/III E30

87-94

VK-384-18-H

£90.65

325i Touring E30

81-94

PBV38935

£90.65

316i E36

90-99

VK-384-3185-H

£90.65

318i E36

90-99

VK-384-3185-H

£90.65

318is E36

89-94

VK-384-3185-H

£90.65

316i/318ti Compact E36

95>

VK-384-3185-H

£90.65

316i E46

99>

VK-384-3185-H

£90.65

318i E46

99>

VK-384-3185-H

£90.65

316i/318ti Compact E46

99>

VK-384-3185-H

£90.65

320i E36/Cabrio/Coupe

90>

VK-384-3185-H

£90.65

323ti E36 Compact

96>

VK-384-3185-H

£90.65

323ti E46 Compact

99>

VK-384-3185-H

£90.65

325i E30 2.5

85-94

VK-384-18-H

£90.65

518i E34

89-95

VK-384-3185-H

£90.65

520i E28

82-87

VK-384-18-H

£90.65

520i E34

89-95

VK-384-3185-H

£90.65

525i (E28)

81-87

VK-384-18-H

£90.65

525i (E34)

88-95

VK-384-3185-H

£90.65

528i (E12)

77-81

VK-384-18-H

£90.65

528i (E28)

81-87

VK-384-18-H

£90.65

530i (E34)

88-95

VK-384-3185-H

£90.65

535i (E28)

85-87

VK-384-18-H

£90.65

535i (E34)

88-95

VK-384-18-H

£90.65

M 535i (E12)

80-81

VK-384-18-H

£90.65

5 Series M535 3.5 E28

84-87

VK-384-18-H

£90.65

540 4.0

92>

VK-384-3185-H

£90.65

628 Csi (E24)

79-89

VK-384-18-H

£90.65

630si

72

VK-384-3T

£90.65

633 Csi (E24)

76-89

VK-384-18-H

£90.65

635csi 3.5 E24

78-89

VK-384-18-H

£90.65

6 Series

85-87

PBV38935

£90.65

7 Series

82-85

PBV38235

£90.65

7 Series

85>

PBV38930

£90.65

728i (E23)

78-86

VK-384-18-H

£90.65

730 3.0 E32 V8

86-94

VK-384-18-H

£90.65

732i (E23)

79-86

VK-384-18-H

£90.65

733i (E23)

77-86

VK-384-18-H

£90.65

735 3.5

95>

VK-385-3185-H

£90.65

745i (E23)

83-86

VK-384-18-H

£90.65

740 4.0 V8

94>

VK-384-3185-H

£90.65

840 4.0 V8

93>

VK-384-3185-H

£90.65

Z1 2.5

88-91

VK-384-18-H

£90.65

Z3 1.8/1.9

94>

VK-384-3185-H

£90.65

Z3 2.8

96>

VK-384-3185-H

£90.65