Fuel Injectors/Fuel Pumps/Regulators

New Bosch Billet Fuel Regulators

We have improved our fuel regulators by using a Bosch Billet Adjustable Regulator. We use these in all our fuel system upgrades as well as with our turbocharger systems. More precise and better seats with a hardened and ground ball and socket design. Holds pressure better for smoother operation and more reliable low battery condition starting.

Part Number 06-1023 $195.00. Comes with 12mm x 1.5 lock nut for easy mounting.

Only the best

RSR Fuel Injection Systems and RSR AIC400 Additional Injector Controllers are designed to run high impedance (12 to 16 Ohm) fuel injectors. We use RC Racing Fuel Injectors exclusively because Russ Collins (The "RC" in RC Racing / RC Engineering) has the most sophisticated fuel injector testing and calibration facility in the industry...Russ has dynamic computerized flow benches that can test injectors from 50 to 50,000 rpm and measure flow rates accurate to the tenth of a cc per minute! We have seen too much variance in fuel injectors delivery to supply injectors that have not been "dynoed" to insure their accuracy.

Russ Collins is in the Motorcycle Hall of Fame for his drag racing innovations and exploits. We met Russ back in 1974 and he was one the sponsors of our Bol D'Or Endurance racing bikes back in 1977. He always aims high and that's why we use his fuel injectors. Russ has the most sophisticated flow benches in the industry and supplies top tier racing teams around the world.

Highs and Lows

RSR Closed Loop Fuel Injection ECUs can support both low and high impedance injectors. Up to 8 low impedance or up to 32 high impedance injectors.

RSR AIC 400 Additional Injector Controllers can support up to four (4) high impedance injectors. The RSR AIC 400 will support one (1) low impedance injector without a ballast resistor or up to two low impedance injectors with external ballast resistors.

Ballast resistors are commonly used on Toyota and Honda cars (early) and are a form of heat sink with a resistance value of around 7 ohms per injector. The ballast resistor is installed between the 12VDc battery positive and the fuel injector's 12VDc lead wire. The fuel injectors "ground" in the ECU to "fire" and the ballast resistor prevents the injector or ECU from overheating. Typically we never use the ballast resistors and stay exclusively with the below listed high impedance (12 to 16 Ohm) RC Racing Fuel Injectors...for a simple reason, they use less current.

Voltage / Resistance in Ohms = Current in Amps. Example: 13.8VDc / 16 Ohm = .8625 Amps; 13.8VDc / 2.5 Ohms = 5.52 Amps. As you can see the electrical amperage load increase rapidly with low impedance injectors.

High or Low, You're covered

RB Racing stocks the full range of RC Fuel Injectors, both high (12-16 Ohm) and low impedance (2-3 Ohm) styles.

High Impedance RC Racing Injectors are available in the below listed sizes, all rated at the industry standard of 3 BAR (43.5 psi). In as much as RSR Fuel Injection Systems typically run at 55psi, we have supplied both figures for each injector.

Low impedance injectors require special injector drivers and cannot be used in a system designed for high impedance injectors. Ohm's Law: 12V/2 Ohms = 6 Amps; 12V/14 Ohms = .857 Amps. Low impedance injectors open quicker than high impedance varieties...this is useful when using very large injectors with small opening times in the idle region and in very high speed operation (14,000 to 20,000 rpm) situations.

Static Flow and Pulsed Flow

For your information the flow rates are based on static flow i.e. the injector is shorted open by grounding one of the leads. However, when your vehicle is operating, the flow never acts this way. It is pulsed, not static. Pulsed flow, when the injector is pulsed to a 100% duty cycle, is about 90% of the figures shown. The rapid switching on and off of the solenoid does not hold the internal pintle or solenoid completely open as in the case of "shorting" it open.

High Impedance Injectors (12-16 Ohm)

LBS/HR@43.5 PSI
CCM@43.5 PSI
LBS/HR@55 PSI
CCM@55 PSI
PART NUMBER
PRICE
14.76
155
16.59
174.22
06-3155
76.50
18.57
195
20.88
219.25
06-3195
79.90
19.52
205
21.95
230.51
06-3205
79.90
20.00
210
22.48
236.13
06-3210
79.90
21.42
225
24.08
252.89
06-3225
81.50
22.85
240
25.69
269.79
06-3240
81.50
25.71
270
28.90
303.54
06-3270
83.75
29.52
310
33.19
348.55
06-3310
85.65
35.23
370
39.61
415.94
06-3370
88.30
41.90
440
47.11
494.69
06-3440
89.75
52.37
550
58.88
618.33
06-3550
95.42
61.90
650
69.60
730.91
06-3650
98.75
71.42
750
80.30
843.28
06-3750
98.75

Low Impedance Injectors (2-3 Ohm)

LBS/HR@43.5 PSI
CCM@43.5 PSI
LBS/HR@55 PSI
CCM@55 PSI
PART NUMBER
PRICE
14.76
155
16.59
174.22
06-4155
78.90
18.57
195
20.88
219.25
06-4195
79.85
20.00
210
22.48
236.13
06-4210
78.90
21.42
225
24.08
252.89
06-4225
79.85
23.81
250
26.77
281.13
06-4250
78.90
25.71
270
28.90
303.54
06-4270
82.50
30.47
320
34.26
359.78
06-4320
86.45
35.23
370
39.61
415.94
06-4370
84.50
52.37
550
58.88
618.33
06-4550
95.42
71.42
750
80.30
843.28
06-4750
98.75
95.22
1000
107.06
1124.30
06-41M0
98.75
152.36
1600
171.32
1799.10
06-41M6
185.00


Fuel Pumps

RB Racing stocks two fuel pumps: (1) Capable of 210 hp @ 55 psi, with 30% by-pass, for normally aspirated applications; 06-1010 (2) Capable of 400 hp @ 80 psi, with 30% by-pass, 06-1011 for Turbocharged Applications.

06-1010, 210 hp, rubber-isolated, black powder coated frame mount, Harley Davidson frames, $349.50

06-1011, 400 hp rubber-isolated, black powder coated frame mount, Harley Davidson frames, $395.00

Keep in mind that you should be by-passing a conservative 30% of your fuel at peak pressures. For example if you are running a normally aspirated application with a 300 hp at 55 psi, it will safely support .7 x 300 = 210 Horsepower. 90 hp worth of fuel will be returned to the tank at peak utilization.

RSR EFI Fuel Injection Systems run at a nominal 55 psi for better atomization. A high boost level of 25 PSI would raise the fuel pump pressure to 55 + 25 = 80 PSI. If you have a 350 hp application at this boost pressure you would want a pump that flows 500 hp worth of fuel at 80 PSI. (350/7) x 10 = 500 hp.

Fuel Injection Calculators: Pressure / Volume / Horsepower


RC Fuel Pressure Conversion Calculator

Bar Kg/cm Psi

RC Injector/Fuel Pump Rating Calculator

cc/Min Grams/Min Grams/Second Lbs/Hour Liters/Hour Gallons/Hour Horsepower

Harley OEM Injectors

2006 models are 3.91 grams/second. 2005 and earlier are 4.35 grams/second. The 25 degree CVO injectors are rated at 4.89 grams/second. 6 grams/second injectors are available from sources like Daytona Twin Tec. Harley Davidson has a service bulletin on injector swaps for earlier models. Keep in mind that an injector will never flow what it is rated statically. Injector duty cycles should not exceed 85% at peak horsepower. We don't get involved with these as we need up to 19 grams per second with our 139 ORCA Turbo motors and have to deal with all sorts of engine combinations with our RSR Fuel Injection.

Injector Size and Fuel Pressure Correction Calculator
Vehicle Description :
Peak Horsepower : (SAE)
Number of Injectors : (total)
RC Injectors Rating in Lb/Hour : (@ 43.5 PSI)
Your Vehicle's Fuel Pressure : (PSI)

RSR
Calculations