You may have to pull off the bottom adapter to see it. Formula: [ (Crank HP Desired ÷ Maximum Injector Duty Cycle) x BSFC] ÷ Number of Injectors = Injector Size in #/hr. Then, you still have some room for manoeuvre and your tuner can lower the duty cycle a bit. For example: An injector that flows 330 cc @ 40 psi will flow 369 cc @ 50 psi. F. Max Duty Cycle % (usually no higher than 80%) Numbers Of Injectors. This is useful for custom injection sytems that may run at a different pressure. This calculator will allow you to calculate injector size based on power requirement. The formula for calculating fuel injector flow is as follows: Q = (P 2 - P 1) × I r. Click here to see our Component ID Guide. Flow rate: This is the result of the fuel injector calculator, and is therefore the injector you need. Sep 1, 2023 · Injector lbs psi efi injectionFuel mass flow rate dependency on pressure drop across injector nozzle Calculator injectorFuel injector injectors performance sizes adapters body. Next, determine the projected area (in^2). *Results are the recommended minimum flow rate required to support the injectors. Example Problem : The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 rising rate fuel pressure regulator for turbo applications Injector flow size – make sure you select cc/min or lb/hr in the drop down, (The amount of fuel you can supply your engine directly affects the amount of power that engine is capable of Dec 9, 2015 · The PCM needs to know that flow rate so it can accurately establish the injector pulse width. 5 psi) and a maximum injector duty cycle (IDC) of 80%. Flow Calculator. 6. The nozzle flow in the injector undergoes cavitation due to sudden fall in the pressure. Next, determine the maximum hydraulic pressure (psi). 5 psi, so using the formula below we can calculate the new injector size based on the difference in pressure. Remember that these figures are guidline estimates. 6. discharge rate calculator) accepts input in both metric and The calculator is not for pulsating flow, or non-steady flow when the flow rate is changing in time. With this tool, it is possible to easily calculate the average volumetric flow rate of fluids by changing each of the three variables: length, pressure and bore diameter. In the lower right, enter in your new injector flow rating and the fuel pressure it is rated at. By changing your fuel pressure, you can change the flow rates of your injectors. Explanations of each input are below the calculator. 15 psi. Peak RPM Volumetric Efficiency at Idle is typically 10% to 15%: Number of injectors in the System: Brake Specific Fuel Consumption (. 5 x 550) ÷ (8 x 0. Free online Flow Rate calculator which helps you calculate the flow rate of any pipe given its diameter and liquid/gas velocity or its height and width (for a rectangular pipe) and velocity. Fuel Calculators. Choosing the appropriate package for your application is as Injection Calculators. RPM is the rotations per minute. com. 75 g/cc, gram is 0. 48 to 0. The effects on the predicted flow rate are then given in three graphs, where in turn two of the variables are kept constant and the flow rate is plotted GM uses manifold pressure to subtract away from the rail pressure (which it always assumes is 58psi) to calculate pulsewidth. 60 to . B. You can use this calculator for all three types of nozzles covered in standards: ISA 1932 nozzle, long radius nozzle, and Venturi nozzle. 5 psi. 5 PSI for each injector tested. Our lab routinely tests and retests incoming parts. NOTE: This calculator gives you the ACTUAL required fuel flow. Choose a fuel pump that can flow. 6 8 × 85%. 99. It determines how much fuel can be delivered to an engine’s combustion chamber and is critical for achieving the desired horsepower while maintaining proper air-fuel ratios for efficiency and performance. Injectors will go static at about a 92% duty cycle and should be sized for an 80% duty cycle to leave some "wiggle" room. The following calculator will reveal what effect altering pressure will have on your flow rate: Current flow (at known pressure) Known test Pressure Deisred new Pressure Calculated Flow rate at the new pressure Major Injector manufacturers (eg. Apr 28, 2016 · Note if an injector is leaking during the cylinder exhaust stroke it will cause the exhaust white smoke that often indicates bad injectors. Individual components are available for those designing their own fuel system. Bosch) do not rate injectors in flow/time (cc/min), they use mass/time (g/min). Finally, calculate the Injection Pressure. The inputs are, in order of appearance: The number of cylinders in your engine, The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 Here is a fuel injector excel spread sheet calculator for the correct fuel injector settings. 684 g/cc, petrol 0. It's an input to your calculations, not an output. Injector Flow Rate at 3 bar (CC/min) Injector Rated Pressure (bar) Peak Injector Duty Cycle (%) Fuel Rail Pressure (bar) Number of Injectors. 50, Supercharged and Turbocharged engines will want to be at 0. 7. Effect of injection pressure on performance of dual fuel diesel engineRear mount turbo o2 questions Injector sizing for boosted centrifugal supercharged trucks!Reduction Dec 22, 2022 · Fuel injector flow rate variance is a critical factor in the performance and efficiency of internal combustion engines. 1 Cavitation is described as the development and movement of a bubble, the development of turbulent pressure and velocity fluctuation, and the increase in Jul 31, 2023 · First, determine the maximum injection pressure (psi). Recent open flow test of six injectors showed a flow of 366-378 cc/min at a constant pressure of 43. Fuel Pump Calculator. Click here to purchase a harness. To do another, click the Clear Values button and then enter a new set of values. Dec 29, 2006 · Given a pulse width, fuel pressure, and (open) injector flow rate, can one scale the open flow rate by the duty cycle to arrive at an accurate figure for fuel volume injected per pulse? It seems to me that you need to know the mechanical lag in the valve -- i. Total Estimated Engine HP. 0 Bar (145. 5 psi, we calculate the required pressure to satisfy the new horsepower requirement as follows: This formula is used to calculate the force required to clamp the mold halves during injection molding. C. 5 psi fuel pressure so you will need to convert to the GM 59 psi. 80) x 0. Where IDC is the injector duty cycle. Injector calculators to match size to horsepower for gasoline, E85, E98, Methanol. psi if NOT using a vacuum referenced fuel pressure regulator. Dec 2, 2015 · Enter the anticipated or improved fuel pressure at the injector inlet. 5 psi) Using Gasoline at 52 Degrees C (125 Degrees F) Maximum Differential Fuel Pressure – 10. e. Next, gather the formula from above = IR = I * dP. engineeredbydesign. Then, experiments were conducted by a pintle injector element which was simplified from pintle injectors re closure pressure gradients range from 0. When using a 1:1 rising rate fuel pressure regulator, the Base Pressure is the differential that the injector ‘sees’ regardless of boost level At 6000 rpm it takes 20 ms for two revolutions. Your new injector flow rate will be calculated automatically. You can use this calculator: May 1, 2017 · This is why I constantly preach to make sure you buy injectors with valid data from companies like ID, Fuel Injection Connection, Detschwerks etc. Conversions. Next, determine the pressure difference between injection and well bottom hole flow pressure (psi). Enter known data in appropriate box. uk. Email SEP. This will allow you to convert Lbs/Hr flow rate to CC/Min rate or the other way around. On high impedance injectors i. and/or propagating fractures at all sites. This calculator will convert your known injector flow data into other units. *Battery voltage should also be considered when selecting a pump. Fuel flow is expressed i cc/min or lb/hr. The inputs are, in order of appearance: The number of cylinders in your engine, The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 Professional Fuel Injector Calculator. Receive our latest updates about our products and promotions. Calculate flow rate from pressure. When you choose a fuel pump size, you should consider the fuel pump curves for your fuel pressure usage. This calculator will allow you to convert injector flow to a different unit. 55 to . Or. Injector flow rate x Number of injectors x 0. Injection pressure builds by the force of the injection unit and the area of the screw pushing molten plastic into the mold cavity. Sep 27, 2022 · The Accel injector is also 19 lbs. , but at 43. k. This will protect your injectors and ensure you enjoy your engine for a Most injectors are flow rated at 43. Then enter in the fuel pressure of your fuel rail. As per industry standard, all injector flow rates are calculated at a fuel pressure of 43. Idle Target RPM: Idle RPM Peak RPM: Your rev limit may occur before the peak value. Fuel Injection Calculator. GM uses manifold pressure to subtract away from the rail pressure (which it always assumes is 58psi) to calculate pulsewidth. Where: Q: Fuel Injector Flow Rate (in lb/hr or cc/min) P2: New Fuel Pressure (in psi or bar) P1: Original Fuel Pressure (in psi or bar) Ir: Rating of Fuel Injector (in lb/hr or cc/min) You can determine what size fuel injectors you will need by entering a few simple details into our calculator. co. A spray angle model was firstly proposed based on our previous work, and then a model on the discharge coefficient of the orifice was also derived. After inserting the variables and calculating the result, check your answer with the calculator above. You can enter numbers in the white boxes. Set your injector size setting in your tuning software to the new injectors' published flow rate/size. 0 Bar (43. For example if 1 injector releases 2 mm3/sec more fuel than required, the computer will decrease the injector pulse width (cylinder flow rate) for this cylinder by 2 mm3/sec. If an injector is powered for 15 ms at 6000 rpm, then IDC is 75% (15 ms/20 ms). : For factory published specifications of common Bosch Injectors please view the "Injector Spec's" tab at the bottom of this document. Mar 18, 2024 · First, determine the force (lb). 500 *. Click on Calculate Injector Flow. Fuel Injection Calculations Use this page to estimate fuel injector size. Injector Flow Rate * √ (New Pressure / Old Pressure) Number of Injectors: Injector Flow Rates : Old Fuel Pressure : New Fuel Pressure : US (lbs/hour) metric (cc/min) Injector Size =. They have 24508208 stamped on the side of the injectors. You should also check out our compression ratio calculator. 8 MPa. For example, a 255 lph fuel pump does not flow 255 lph at 60 psi. This same equation can be used to estimate the flow of an injector rated at a higher pressure (58psi) operating at a lower pressure. The total projection area is the total of the projected areas of the cavities and runners in relation to the parting surface. injector flow rate = 450 × 0. 300 / 6. 2150’s, 1100’s and 900’s you will find this code scribed into the lower stainless steel portion of the injector. 80 psi/ft gradient for every site was not a sufficient safeguard. If the result here is 590 ccm, for example, we recommend 660 ccm injectors. If a fuel injector is activated for 15 ms (the IPW) at 3000 rpm the duty cycle is 37. Example Problem : The formula is: new flow rate = old flow rate × √ (new pressure ÷ old pressure) So for example, if you had 30 lb/hr injectors rated at 43. It is important to understand that the fueling calculations used by GM are based on an air mass per cycle which is then converted to a fuel mass based Fuel Injector Guide. 4 Static (Quiet) Side 1. Install your aftermarket fuel injectors. 8) = 42. 5. Upgrade your water methanol controller - Try our FrostByte 3D Meth controller. Next, gather the formula from above = IP = F/PA. DUE TO LAUNCH 2024. Dynamic Slope Flow Rate for each individually serial numbered injector. 42 gears, 2800 rpm trq convrt. Most fuel pumps flow rate is advertised in gallons per hour: Lbs/hr / fuel weight per gallon = gal/hr. Click here to see our PCM/Engine Controllers. We show the math in Chart 04 where a 15 psi increase in flow pushes the 42 lb/hr injector to a touch over 48 lbs/hr. Jul 20, 2023 · Calculate Injector Size Based On Desired Crank HP. Check your fuel injector part number with the guide below to verify your flow rate. Open up the Unit Conversion window found under the Tools menu. ENGINE. less backpressure also means injectors will flow more at that rated fuel pump pressure. 3 Well data 1. If your injectors have Data Match Technology matching they will have an alpha numeric serial number on them (AA00). Engine Displacement (CID): C. 0022046 pound. Use EC Tunes calculator floating around. Hold the throttle steady at 3,000 rpm and adjust the "injector size" setting higher or lower until you reach the same air/fuel ratio that you wrote down in step 3 above. Calculate the Potential Crank HP Based on Injector Size. Use the drop down to select which way you want to go. 280155857 (Set of 8) $ 94. The formula above calculates the corrected You can determine what size fuel injectors you will need by entering a few simple details into our calculator. This calculator helps express the convertion of flow depending of what information is provided. injector flow rate = 39. Generally, the cavity pressure inside the mold is within the range of approximately 300 to 500 kgf/cm 2. You can convert Used to convert Lbs/Hr to CC/Min or the other way around. The injection pressure is typically measured in pounds per square inch (psi) or bars (1 bar = 14. Data used: N-Heptane 0. injector flow rate = 270 6. 1. Next, gather the formula from above = Ri = MIP / MHP. Finally, calculate the Intensification Ratio. This rating is for 0 VAC. 5) = 32 lb/hr. Finally, calculate the Injection Rate. This translates into injection pressure between 10,000 and 20,000 psi Nov 6, 2019 · Injection wells have long been an essential asset in enhanced oil recovery, wastewater disposal and carbon dioxide sequestration in petroleum industries. 45 or less for 4 valve) B. The pressure can be between 1000 and 5000 psi in the hydraulic lines. Fuel Pressure effects flow rate of injectors. IPW is the injector pulse width (ms) To calculate the injector duty cycle, multiply the RPM of the injector by the pulse width of the injector. LPH at. S. HP Per Injector. 3. The standard kit includes all the hardware and the software programme, with optional future add-ons/upgrades available. The only real flawless way to get this is to have the engine tested on a dynomometer / rolling road. From the selection chart on the bottom we can see that a Walbro high pressure 255 Basic Specifications. 2 Multiple Wellbore Configurations 1. The grey box will show you the injector duty cycle %. I. You can even copy and paste it into your efi. Injector Flow Rate Lb/hr. Jan 5, 2005 · the sonata injectors flow 290 cc @ 43. As manifold vacuum increases the Injector Dynamics Fuel Rail kits are available as a complete engineered system designed to simplify installation, reduce fuel pressure pulsations, and increase fuel flow through proper pressure regulation. The inputs are, in order of appearance: The number of cylinders in your engine, The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 To get the flow of a particular injector at a different flow rate, please use or Flow Rate Calculator. Variations such as Natural Aspirated, Turbo or supercharged, or specific type of gasoline, can be used. BSFC. Oct 1, 2016 · The flow pressure at injector body of group-hole nozzles is classified into three different ratios namely 120, 130, and 140 MPa, while the backpressure in the chamber is remained fixed at 1. 1 Production data 1. *A 10% safety factor has been added to the flow rate to account for possible line losses. This slope flow rate, expressed in cc/min at the pressure and temperature listed on the sheet, represents the linear flow rate that the ECU can use when calculating the pulse width (length of time to open) it needs to send to the injector. 2 Well deviation survey 1. To calculate the horsepower capacity of injectors based on their flow rating: Fuel injectors max HP (lb/hr)* =. Fuel Pump and Injector Sizing Calculator. The BSFC for this setup will be 0. Every tuner should have this!!! I got this from this forum so thank you and god bless who ever did the actual work!! RPM level 5 trans, RPM 3. The “Reset fields” button writes the default values into the white Fuel Injector Clinic flow sheet sample: View a Sample Injector Flow Sheet. ECU tuning and injector calibration data for Snake Eater Performance Pro-Series and Original injectors. 0 psi) Advanced Fuel Injector Calculator. Jul 31, 2023 · The following formula is used to calculate an injector duty cycle: IDC = RPM * IPW I DC = RPM ∗ I P W. This calculator is designed to estimate fuel needs based on desired horsepower, fuel pressure, and fuel type. a. Jan 11, 2024 · Injector size refers to the flow rate of fuel injectors in an engine, typically measured in pounds per hour (lb/hr). (Motorcraft rates their injectors at 39. You can use the calculator below to determine injector duty cycle when engine speed and injector pulse width are known. If you need additional support, please contact us: Support@SnakeEaterPerformance. If you know the engine speed (rpm) and the IPW (dataloggers Fuel Pressure Modification. 75. CATALOGUE. 5 psi at the rail. 6 according to the chart above. 5 psi so what will they flow on the XD ? well, the XD has a 50 psi rail pressure, so if you were to put 290 in the injector box and click " Calculate", it will tell you that the effective flow rate of the 290s are actually 310 cc on the XD !! Sweet !! Opening Times Sunday: Closed Monday: 9am-5pm Tuesday: 9am-5pm Wednesday: 9am-5pm Thursday: 9am-5pm Friday: 9am-5pm Saturday: Closed In addition to the fuel injector control, FuelTech engine management systems offer a wide-range of standard options. Bottomhole Pressure Calculations Bottomhole Pressure Calculations Table of contents 1. Ed M. 5 PSI from their manufacturer. 50 for naturally aspirated engines . Fuel injectors max HP (cc/min)* =. 3 Flow Paths 1. the flow characteristics at the edges of the pulse. 60 for supercharged engines and . It will also allow the input of various fuels such as gasoline, E85, E98 and Methanol. Design nozzle and injector to match. Pressure is applied to the molten plastic that results from the main hydraulic pressure pushing against the back end of the injection screw (or plunger). Region 5 PolicyRegion 5 advises that, except under certain circumstances discussed below, maximum injection Nov 29, 2023 · Due to a sudden change in shape, the boundary layer of a fuel injector nozzle separates near the nozzle throat, and a recirculation zone develops, causing the pressure to fall below the saturation pressure and forming a cavitation region. tun. 5 PSI. Fuel & Fuel Economy Automotive Calculators. ASNU’s Digital Flow Kit is an exciting new add-on kit that can work with any ASNU Classic GDI machine to enable more accurate & specific measuring when testing fuel injectors. The inputs are, in order of appearance: The number of cylinders in your engine, The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 Jan 28, 2024 · Formula Explanation: The flow rate of an injector is affected by the temperature and pressure at the inlet. 5 psi Calculated Injector Flow Rate Jul 24, 2023 · First, determine the injectivity (bbl/day/psi). 32 gal/hr. The inputs are, in order of appearance: The number of cylinders in your engine, The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 Use the fuel injector flow rate calculator to calculate flow rate, pressure and horsepower for gasoline, race gas and e85 (ethanol) with a base fuel pressure of 3 Bar (43. is there a way to estimate the pressure drop more precisely Usually you'll pick a pressure drop and design for it, rather than trying to estimate it. /hr. 78. Now, let’s solve it. You can determine what size fuel injectors you will need by entering a few simple details into our calculator. See how the pressure change can effect the rate of flow in injectors and the power delivered. 706 lbs/hr. May 31, 2023 · May 31, 2023. Base Fuel Pressure (also: Base Pressure): The pressure to which a fuel system is regulated during start and idle condition. 6 = 300 lbs/hr. # of Cylinders Fuel Pressure (psi) (?) Engine Aspiration. Injector Flow Rate = (0. RX7 FD Secondary 850cc Kit $ 8. Flow Rate - In Lbs/Hour or CC/Minute (use dropdown to choose measure) Number of Injectors - Number of Injectors used (often 1 per cylinder, but not always true) BSFC - N/A engines will have a BSFC in the range 0. Injectors. The injection duration and timing are affected by the nozzle diameter, area, and the characteristics of the injected fluid. Example: The recommended 0 in/Hg rail pressure for the OEM 24 lbs/hr injectors in the 1993 to 1998 Lincoln Mark VIII is 39. 60 lbs/per plus. It influences the material's flow within the mold, affecting the finished product's appearance, dimensional accuracy, and structural integrity. Variations in the flow rate of fuel injectors can significantly impact engine power, fuel economy, and emissions. Fuel Injector Calculator. Product Questions? 405-217-0701. To make 500 crank HP at 30 PSI of boost we need a fuel pump that will be able to supply 47. Therefore, the flow rate needs to be corrected to standard conditions. Calculators – Injector HP/KW Rating Calculator. You can select between horsepower (HP) or kilowatt (KW). 7 and this is the number you would use. Includes a rich graphical interface to visulize the output. The pipe flow rate calculator (a. Industry-Leading Technical Support. Enter the Convert lb/hr to cc/min to g/s and more. BSFC x 10. Injection pressure is a crucial parameter in the process of injection molding. This worksheet can do the calculations for you: The Bosch 0280155868 flows 375 cc/min at a tested pressure of 3 bar (43. 65 for turbocharged engines. The temperature profile of fluid flow in the injection well is one of the main parameters of interest for petroleum engineers to determine optimum injection conditions and wellbore completion design especially in thermal injection projects Changing your injector fuel pressure, then you may want to use this tool to understand what your new flow rate of the injector will be. D. Engine Type: Fuel Pump Units: Injector Flow Units: Number of Cylinders: Jun 10, 2022 · Let’s calculate how an increase in fuel pressure to 58 psi will increase flow. INJECTORS. Fuel Injector Calculator – Calculate What Size Fuel Injectors You Need FUEL INJECTOR CALCULATOR FOR GASOLINE AND E85 The following is a guideline equation for approximating fuel flow per injector based on estimates on engine Horsepower (HP) and Brake Specific Fuel Consumption (BSFC). To calculate the flow rate at a given pressure, use this formula: [Advertised Flow Rate] X [The Square Root of (Your Pressure ÷ Rated Pressure)] This Injector Rx “Calculate horsepower based on injector size” calculator will allow you to calculate how much horsepower or KW a specific fuel injector can support. First off the IFR is at 43. Commonly set to 43. 5. . 65] ÷ 8 = 50. net. BSFC is the amount of fuel consumed for each horsepower made. 91 psi/ft. 5 psi). 5 Convert from Gauge Pressure to Sandface Here. It is important to understand that the fueling calculations used by GM are based on an air mass per cycle which is then converted to a fuel mass based Jan 1, 2019 · The flow characteristics of a pintle injector element were studied by theory and experiments. Calculated Fuel Flow (CC/min) Desired % of Fuel to be Injected (12% for efficient set-ups GM Injector Characterization. 45 to . This calculator will generate pulsewidth values for specific rpms, from idle to peak speeds. Fuel Injector Size Calculator Fuel Pressue - The fuel pressure in your rails. 70. au. www. It is clear that Region 5's previous practice of using a 0. Calc new flow when fuel pressure change. Fuel Injector Units Converter. Understanding and calculating the correct injection pressure is vital for creating quality injection-molded parts. ) If you are running a different pressure, your actual flow rate will be different than the advertised rate. Enter the fuel injector fuel flow rating in pounds of fuel per hours (lbs/hr). 8. Use the flow rate (Bar) listed on this site as the “old” pressure, and the pressure you would like to know as the “New” pressure. 96 lb/hr If the rated flow of the 39-pound injector was established at, say, 43. Keep in mind that "New Pressure" is the current system pressure, NOT the new injector pressure. Here is a copy that I have used/modified a bit to correct a Main Injector Failure •Combustion Instability ¾Characterized by Pressure peaks and temperature spikes • Often Un-predictable ¾Driven by Injector Design and Flow Conditions ¾It is very costly to have an anomaly on the Test Stand and then re-design ¾Therefore, NASA is very driven to use and continually improve predictive tools that can aid in The BASE* fuel pressure you will run (your fuel pressure at idle), *our calculator assumes a 1:1 rising rate fuel pressure regulator for turbo applications Injector flow size – make sure you select cc/min or lb/hr in the drop down, (The amount of fuel you can supply your engine directly affects the amount of power that engine is capable of Flow Rate Calculator. While we DO NOT give remote tuning advice, we can help with technical concerns. C value. Example: [ (500 ÷ 0. As you can see, the example outlined above is the default. Injector Flow Calculator Injector HP/KW Rating Calculator Injector Flow VS Fuel Pressure Calculator Fuel Pump Calculator General Conversions. Once you select those values it will populate an estimated fuel pump flow rate required to meet your needs. fuel injector guide. 1 Casing- and Tubing Data 1. 5 for 2 Valve, . Water Injection Nozzle Calculator. Injection pressure is applied with an injection unit. This calculator also calculates total pressure drop created by the nozzle. The FT600, FT550, FT550LITE, and FT450 are all-inclusive ECUs that feature sequential injection and ignition, O2 closed loop, Data Logger, Delay Box, Boost Controller, Nitrous Controller, and much more. Injector Flow Rate CC. This should be . 5 psi, and you went to 50 psi, you would get: flow rate = 30 * √ (50/43. 5% (15 ms/40 ms), or rpm times IPW divided by 1200 equals IDC in percent. To calculate the required pressure increase we need to know the required flow rate to satisfy our safety margin at 550 hp. Nominal Flow Rate – 1065cc/min @ 3. If you need to "bump" the pressure past that to Pick a reasonable chamber pressure. Looking for 500 horsepower to the rear wheels? How about 1000 horsepower at the crankshaft? You can determine what size fuel injectors you will need by entering a few simple details into our calculator. are some hints -. That is also also why the IFR values increase in value as you get more and more vacumn. To convert Bar to psi, multiply the Bar number by 14. Let’s enter the values into the formula. The value will be returned in lbs/hr based on the improved fuel pressure. By referencing the flow rate table, in which the flow rate at various effective pressures is programmed in, the PCM knows what flow the injector is capable of at any given operating system. While the injector characterization data used by General Motors is surrounded by mystery and misinformation, its purpose and practical use is actually quite simple. Fluid flow rate through pipe given pressure difference at two points. Compute C*, mass flow, O:F ratio, etc. Input 1. Understanding the causes, measurement, and mitigation of fuel injector flow rate variance is essential for 1. GM Injector Characterization. RX7 FC Kit $ 2. The constants used are 160 CFM per 100 HP, and an 85% duty cycle for maximum injector pulsewidth. dtec. 34 = 47. 5 gal/hr at 78. ar gg oj qx wu lf jl ky vl kp