Injector duty cycle hp calculator

) Here is a simple calculator that will do that. 85. Estimated HP. /hr. Higher duty cycle and your injectors can overheat, flutter, and all sorts of other nasty things. 95 Cobra - Comp Billet PT8047 DIY Turbo and 340CI A4 Car. When you choose a fuel pump size, you should consider the fuel pump curves for your fuel pressure usage. 0. When IDC exceeds a certain point, horsepower can actually To use the Fuel Injector Flow Change tool to select the current pressure and flow then the NEW or expected pressure to run. San Diego, CA. Commonly set to 43. F. Sounds like the calculator is pretty accurate. A four stroke engine takes 2 complete rotations of the crankshaft to complete a cycle. ), fuel type, BSFC (brake specific fuel consumption), and injector max duty cycle. 60 lbs/per plus. Here are some hints -. Car is Petrol driven – Jan 13, 2005 · Here is the formula. I am trying to chase down why I am running lean under WOT. 5), with 8 injectors will need 23. Flow rate: This is the result of the fuel injector calculator, and is therefore the injector you need. Life was good. Methanol Injector Calculator Formula Formulas used to determine injector size: you don't want an injector to be open more than 90% of the time at the most. 85 for modified and road racing engines. That needs to stay below about 85-90% or you need 13,635. Jan 4, 2024 · Keep in mind that this is a simplified formula, and other factors, such as the duty cycle of the injectors and the type of fuel, can also influence the selection of injector size. This calculator will do it for both 2 Stroke and 4 stroke engines. Specify the duty cycle the injectors will be run at. We then divide 325 lb/hr by 6. Maximum injector duty cycle (IDC) (In order to be conservative, Fuel Injector Clinic recommends a maximum duty cycle of 90%. horsepower, hit the 'Sample' button to give it a try. 0 AFR ) Boost enrichment does not kick in until 2psi of boost. Fuel Pressure (psi) Engine Aspiration. 56 Carburetor Size Calculator. Apr 3, 2018 · Target flywheel HP x . This is a simple calculator for determining the approximate size of a carburetor. Cruise 50mph with 10% duty cycle 36lb/hr 8x injectors. Fuel Injector Calculator to find out What Size Fuel Injectors Do I Need? Easy Fuel Injector Calculator. Skip to content (770) 888-1662 Nov 29, 2017 · Injector Duty Cycle (IDC) is a very common term when tuning our DSM’s, or any fuel injector platform for that matter. Ex. Explanations of each input are below the calculator. If you are runing over this it's time to look for a larger injector. If an injector is powered for 15 ms at 6000 rpm, then IDC is 75% (15 ms/20 ms). Total Estimated Engine HP. The Volumetric Efficiency is a bit more tricky and is at Jan 7, 2015 · There is a much narrower window on a DI engine to determine true duty cycle. Click the Picture to give CarbCalc a try. X scanner. Power wise once you hit 100% you wont lose power but if you fit larger injectors you will make more peak power. 45 or less for 4 valve) B. Non-fuel related, a misfire can be detected 6 days ago · How to Use. Peak RPM Volumetric Efficiency at Idle is typically 10% to 15%: Number of injectors in the System: Brake Specific Fuel Consumption (. 49% is 627. 8. So for our above example, the duty cycle would be 25%: 25ms PW / 100ms period = . I put it on the dyno today and it maxxed out the MAF so i switched over to SD to dial in the VE (2bar OS). Injector Duty Cycle: This is the percentage of time that the injector is open during the engine's operation. i have a 2000 camaro with a midsized cam and bolt-ons. I. 8 - 0. It is not good, but it is possible, and it doesn't mean that the injector is "static. If we divide that volume by eight injectors (for a V8 engine), this comes to 31. ) Fuel Injector Clinic's Horsepower Calculator helps you know what horsepower each injector size will support. It has 72lb (750cc) fuel injector connection injectors in it and they're going up to 90-95% duty cycle by 6,500 rpm. Injector Size = (Engine HP (Flywheel)) x (BSFC) applications shouldn't exceed 80%. Let us use the example of an engine running at 600 RPM’s. 80 for most OE engines and 0. Injector Duty Cycle is now located in Math Parameters if you or others are looking and isn't added to the Channels table. dc. Formula: [(Crank HP Desired ÷ Maximum Injector Duty Cycle) x BSFC] ÷ Number of Injectors = Injector Size in #/hr. I am trying to log using the scanner to start off, logging the normal things, RPM, Timing, Fuel Pump, O2's, etc, but using the HP tuners software cannot get the Injector Duty Cycle to work, just comes up unsupported, This Injector Duty Apr 24, 2017 · At 6000 rpm it takes 20 ms for two revolutions. The result is the flow rate in lb/hr. The RPM of the motor is what is going to determine the “time”. injectors size X # of injectors/5. 0 whp 100 whp Posts. #5 · Mar 5, 2014. 5 psi) and a maximum injector duty cycle (IDC) of 80%. Mar 5, 2014 · 2588 posts · Joined 2005. Now i know this is for a gasoline engine but wouldn't a diesel be the same? For example. The wideband showed the open-loop PE mixture right at lambda 0. The store will not work correctly in the case when cookies are disabled. If you already have our Layouts you won't need to follow Opening Times Sunday: Closed Monday: 9am-5pm Tuesday: 9am-5pm Wednesday: 9am-5pm Thursday: 9am-5pm Friday: 9am-5pm Saturday: Closed . If a fuel injector is activated for 15 ms (the IPW) at 3000 rpm the duty cycle is 37. 2156 duty cycle = 8. Like stated log rail pressure commanded and actual to see if fuel flow is there. Then, the fuel injector size in cubic centimeters per minute (cc/min) is obtained by multiplying the injector size in pounds per hour by 10. Picking the proper fuel injector size is critical for performance and tuning control. My guess is that you never added the channel yet. For this example, we will say the pulse width is . Idle Target RPM: Idle RPM Peak RPM: Your rev limit may occur before the peak value. 65 for turbocharged engines. 72miles per gallon speed: [50020. LPH at. S. The knock retard channel must be displayed in the main channels list on the left in the scanner for it to show up in the graphs or charts. The Size of the engine can be in Cubic Inches or Cubic Centimeters. The constants used are 160 CFM per 100 HP, and an 85% duty cycle for maximum injector pulsewidth. HP Tuners Support (foff667) Join Date Jun 2004 Location Hailing from Parts Unknown Posts 28,285. To find the ideal flow rate, simply plug in the values found in steps one, two, and three into the formula and solve. 40 milliseconds * 0. In actuality the injectors are never open 100% of the time. @ 43PSI of fuel and 100% injector duty cicle, so take about 10% of the cycle to be safe. 5 for 2 Valve, . Our 4G63’s are of course 4 stroke engines. 80) Fuel Pressue - The fuel pressure in your rails. Just starting using HP tuners as part of a college class in tuning, of course the class is teaching on GM but having GT500, things seems somewhat different. Oct 29, 2017 · Its reasonable to assume the HP if we have a rough idea of the bsfc. Injector Duty Cycle. To calculate your required flow rate, use this formula: (Horsepower X BSFC) ÷ (number of injectors X injector duty cycle) For example, a naturally aspirated, 300 hp engine (BSFC 0. “Duty cycle is the percentage of time an injector is open during one injection period (which could be one or two engine revolutions),” Flynn explains. 03 seconds. 35 gm/s – 2008-2017 Twin Cam Throttle by wire. Additionally, the engine’s air/fuel ratio and the specific requirements of the fuel injection system should be considered when choosing injector sizes. This should be . 80) x 0. 2= 162. LS1 LS2 LS7 tuner, L98, LT1 & Haltec. Injector Duty Cycle PID. Apr 15, 2021 · The data logs in Holley EFI products will provide this information, which ultimately tells you whether or not the injector’s capacity is able to keep pace with the engine’s demands. This will protect your injectors and ensure you enjoy your engine for a Select either your horsepower rating or your injector size. 264 milliseconds. 120/6000 = . Saturated: This signal is used to operate high Fuel Injector Calculator is probably the most detailed Fuel Injector sizing software available. 65 BSFC\ (duty cycle\ # of injectors) example for 800 bHP on e85 running 80% injector duty cycle. This would give us 300 cycles per minute (600 / 2 = 300). Injector sizes are in cc/min. Injector Flow Rate CC. injector flow rate = horsepower × BSFC # cylinders × safe duty cycle. Complete Race Car Wiring. Pulse width is used in conjunction with RPM to determine the injector duty cycle. So, it is inactive. 7lb/min, at about 5,200 rpm. or 330 cc / min (Use the Fuel Injector Worksheet below to perform this calculation for you. that fuel pump died in under a year and i ran the car not knowing it with very low fuel pressure, the injector duty cycle was at 120% so i installed a Mar 17, 2004 · Injector and fuel pump duty cycle? I've logged what I thought to be the correct channels for injector and fuel pump duty cycle. In the example you show. 5 Liter Eater and Michael D are right. Aug 23, 2016 · This great video will show you how to set up and view Injector Duty cyle using HP Tuners 3. To choose the best fuel injector for your You can determine what size fuel injectors you will need by entering a few simple details into our calculator. 8 = 303hp - 10% = 273hp safe! Opening Times Sunday: Closed Monday: 9am-5pm Tuesday: 9am-5pm Wednesday: 9am-5pm Thursday: 9am-5pm Friday: 9am-5pm Saturday: Closed USA. of injectors*Duty cycle), where BSFC = 045, No of injectors = 4, Duty cycle = 0. 05 seconds. Jan 4, 2024 · The formula used for calculating the Duty Cycle is: Duty Cycle (%)=Flow Rate (lb/hr)Number of Injectors×Engine HP×BSFC×100 Duty Cycle (%) = Number of Injectors × Engine HP × BSFC Flow Rate (lb/hr) × 100. 1L "531" 30lb injectors because I was running into 95% injector duty-cycle without the blower. with the stock injectors (26. 04 = 40 milliseconds. An injector this size can also provide an accurate amount of fuel at low rpm. 65\3. 1. So, a 105% injector duty cycle is possible. Carb Size Calculator. How many cylinders: Expected Power Injector Calculator Data Download Find a Dealer Jan 17, 2016 · I am getting MAF from MAF sensor. 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. In open loop, MAF de-activated, PE turned off, tuning the VE table only, I have richened it up to a point where it wont go below ~ 14. We've built this handy Fuel Injector sizing calculator to help you determine how much flow you'll need. Engine Displacement (CID): C. To choose the best fuel injector for your Duty Cycle Formula. 3000 cycles per minute / 60 seconds = 50 cycles per second. " Injector Duty Cycle (%): Injector Flow Rate (cc/min): Calculate Fuel Flow Rate This is based on the amount of horsepower of the engine, number of fuel injectors, induction type (normally aspirated, supercharged, etc. By the way, when I said 43 psi base fuel pressure most of you correctly understood that I meant 43 psi at zero manifold pressure and boost referenced 1:1 Horsepower Calculator; Data Match Technology; Injector Calculator; ECU Data. The length of time they are open while your engine is running is called injector duty cycle (IDC). I'm running 46 pph injectors at 91% duty cycle From the injector formula I get 310 flywheel hp. The result is a far more accurate estimation, which allows you to pick the right injector the first time. *A 10% safety factor has been added to the flow rate to account for possible line losses. Fuel Pump and Injector Sizing Calculator. 45 to . 60 for supercharged engines and . “If The amount of time an injector is turned on to delivering fuel is known as injector duty cycle. Click the button, and your maximum Here are the OEM injector sizes for H-D Delphi injected models: 4. Open your scanner>open gauge display>right click with the cursor on the gauge display>left click on the parameter that you want to replace with injector duty cycle>left click on PID:> left click on Inj. The output graph shows a range of injector sizes vs. Calculate: Click the “Calculate Injector Duty Cycle Jul 20, 2023 · Remember to consider additional factors such as duty cycle, fuel pressure, and injector latency to make an informed decision. Injector Size: This is the appropriate size of the injector required for the methanol fuel system. Then we have 8 cylinders times 0. So 55% of a 160 injector is 704 pounds of fuel, again assuming a perfect world. HP Per Injector. 120/3000 = . per hour) for each horsepower made. Horsepower desired. 35 gm/s – 2001-2005 Twin Cam. Pulse Width (IPW): Specify the pulse width, which represents the duration the injector remains open per cycle, typically in milliseconds (ms). I Decided to upgrade to the 8. Typical injector limits for duty cycle is 80-85%. Check the injector wiring to make sure you don't have an intermittent injector connection. If our radar has a peak power of 20 kW, we can find the average power of the pulse is 200 W. 60%. For this example, we will assume the period is . Calculate Injector Size Based On Desired Crank HP. Injector flow = (HP (instantaneous)*BSFC)/(No. You calculate it with the duty cycle formula: D = PW/D × 100% = 10 ms/1000 ms × 100% = 1%. 6lbs) and a walbro 255 pump my car was at 98% duty cycle. 25 lbs/hr necessary to feed the engine. (# of injectors) x (Duty Cycle) Injectors are rated at 100% duty cycle (static flow). NOTE: This calculator gives you the ACTUAL required fuel flow. Your engine is turning less than 3600 RPM at this point, the duty cycle will increase with RPM and throttle position. 5% (15 ms/40 ms), or rpm times IPW divided by 1200 equals IDC in percent. 5 lb/ min or right at 287 flywheel horsepower based on air flow. BSFC is the amount of fuel consumed for each horsepower made. 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. 110] duty cycle: [50112. If the result here is 590 ccm, for example, we recommend 660 ccm injectors. 05 = . Use the attachments feature under advanced reply. 85 duty cycle equals 6. 90%. Old Pressure - Injectors Old Operating Pressure (PSI) Old Flow Rate - In Lbs/Hour or CC/Minute (use dropdown to choose measure) Max Maf flow was 28. Even in this case I suggest keeping the max duty below 90%. If you know the engine speed (rpm) and the IPW (dataloggers Mar 15, 2024 · The calculation for duty cycle is very simple; it's just the pulse width divided by the period, which gives the percentage of time that the coil is being energized, compared to the total time available before it has to be energized again. Here. Using the formula above we find the duty cycle is: . Simply enter your goal crank horsepower goal, the number of injectors (cylinders) your engine has, the correct number based on aspiration of your engine, and goal PSI at the rail. So, I installed the new Pulse Width (also called Injector Pulse Width or IPW): Length of time between the ‘on’,or ‘actuation’ of the injector and the ‘off’, or ‘deactivation’ of the injector for one pulse or fueling event. 83 BSFC, but I wanted to hear that confirmed by some real people. It's always nice to have a little headroom available in your injectors. Marine. 91 gm/s – 2006-2017 Twin Cam w/cable throttle. 50 for naturally aspirated engines, . I've had trouble with the older EV1 style of injector becoming Fuel Injection Calculator. *Results are the recommended minimum flow rate required to support the injectors. It's maxing out dynamic airflow, 67. Next we need to convert those converted to cycles per Maximum injector duty cycle (IDC) (In order to be conservative, Fuel Injector Clinic recommends a maximum duty cycle of 90%. Joe. 8293gal/hr * 8 = 4. Max Duty Cycle % (usually no higher than 80%) Numbers Of Injectors. 90. Duty cycle is 80%. ECU Controlled Max Duty Cycle is the maximum injector duty your reprogrammed computer uses. Jul 11, 2012 · The safe duty cycle is 0. I am calculating HP from OBD parameters. Jun 10, 2022 · The simple formula is horsepower times BSFC – or 500 horsepower x 0. 6. 60 = 60%. 8 = hp So! 440cc X 4 / 5. Not sure I believe fuel pump duty cycle at only The formula for calculating the correct size fuel injector for your Mustang is calculated by: Injector Flow Rate (lb/hr) = (Engine HP) x (BSFC) / (Number of Injectors) x (Injector Duty Cycle) If you are trying to compare injector flow rates and you have flow data at one delta pressure, you can easily calculate the flow rate at a different delta It is measured in pounds per horsepower per hour (lb/hp/hr). The RPM entered should be the maximum RPM the engine is to run (you know that RED LINE on your tachometer). Ed M. 8 and get 47. It includes these features: It includes these features: Estimate injector requirements from as few a 3 inputs (HP and Number of Cylinders, using the program's easy default settings) or as many as 14 inputs with great detail. 5 = 250 lbs/hr of fuel. Only Chart or Graph as needed per above. If you are showing 49% on the standard duty PID built into the scanner then you are well past maxed on fuel system or injector. 38 gm/s – 2017-later Milwaukee-8 (all models) 4. 6000 RPM / 2 ( Otto cycle engine) = 3000 cycles per minute. So the most important value is at full-throttle and maximum RPM. Best not to run higher that 80% injector duty Nov 2007. Jul 25, 2023 · How to calculate duty cycle? First, determine the pulse width. 24 milliseconds. 80%. 70%. Injectors will go static at about a 92% duty cycle and should be sized for an 80% duty cycle to leave some "wiggle" room. Use the following formula to calculate the proper flow rate for your injectors. Number of cylinders - Fuel BASE pressure pressure (your fuel pressure at idle) - Engine aspiration - Horsepower - Maximum injector duty cycle (IDC %) we recommend a maximum of 90%. 5 psi. Give this calculator your engine size, maximum RPM and a few other bits and this will calculate a recommended carburetor size in CFM. 8 factor represents an 80% duty cycle, which is a common safety margin used to ensure the injectors are not working at their maximum capacity all the time, allowing for reliability and longevity. During normal engine operation, the fuel injector fires once during the four strokes of the Otto cycle, which last for 2 revolutions of the engine. 79 lb/hr as our required injector size to feed 650 horsepower, naturally aspirated on gasoline. 5. 249] * [50070. Remember these are ESTIMATES always consult your engine builder or tuner for final sizes Professional Fuel Injector Calculator. '18 Charger Hellcat. Using the Injector Duty Cycle Calculator is straightforward: Enter Engine RPM: Input the engine speed in revolutions per minute (RPM). 20 milliseconds * 0. B. Here is a simple calculator that will do that. It is measured in pounds per horsepower per hour (lb/hp/hr). 80 pounds of fuel is fairly drastic, but of course this is assuming identical afr and things like that. 25, or 25%. 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. Variations such as Natural Aspirated, Turbo or supercharged, or specific type of gasoline, can be used. but my tuning software shows the numbers in All that remains is adjust flow rate to duty cycle, multiply #ofinjectors, then compare with speed. Actual injector pulse width time / total cycle time duration available at those RPM = Injectors Duty cycle % Example: 6000 RPM, actual injector pulse width is 15 ms. When the engine needs more fuel, the time that the injector stays on (its duty cycle) increases so that more fuel This calculator will allow you to calculate injector size based on power requirement. 60 for supercharged engines, and . 5-15:1 (PLX Wideband) at peak load @ ~4800RPM. 50 for naturally aspirated engines . C is brake specific fuel consumption - How much fuel you are using per horsepower per hour The proper injector for this application is 31 lbs. 78 Dec 15, 2009 · The calculator says I need 220 lb/hr injectors based on 80% duty cycle and . of fuel per injector at an 80% (0. AFR = MAF/Injector flow, which comes as 14. Step 4: Calculate Your Optimum Injector Size Armed with the information from steps one through three above, you can now calculate the optimum fuel injector size using the following formula: injector size in lbs. psi if NOT using a vacuum referenced fuel pressure regulator. IIRC, Duty cycle refers to the percentage of the time that the intake valve is open that the injector is commanded ON. FuelTech offers a Fuel Injector Calculator to assist racers and builders select the proper fuel injector sizing. 100%. injector duty cycle is a calculation, you must log the pid's that May 25, 2006 · 95. Methanol Injector Calculator Formula Dec 28, 2007 · Injectors are identified by their flow rate, typically in cubic centimeters per minute, but the rating is based on 100% flow. 66344gal/hr = 10. It will also allow the input of various fuels such as gasoline, E85, E98 and Methanol. 4 lbs. D. Fuel Injector Connection is the leader in high performance fuel injectors from top manufacturers including Bosch, Siemens, and Lucas. duty cycle. C. Finally, calculate the duty cycle. This is measured as a percent, so 50% duty cycle indicates that the injector is held open and held closed for an equal amount of time. Standard RX-7 Injector Sizes: 84-85 GSL-SE = 680cc 86-91 Non-Turbo = 460cc 87-91 Turbo II = 550cc We have many of these injectors available, new or used, for your custom application. The “time” is determined by the RPM. All FuelTech engine management systems are capable of driving stock injectors to massive 850 lb/hr injectors. 8-4. 462 duty cycle = 9. 9 ms converts to about 25% inj. For example, a 255 lph fuel pump does not flow 255 lph at 60 psi. : Duty Cycle (?) * Consult your engine builder for more accurate estimates. ** Maximum Injector Duty Cycle should be around 90% max for safe operation. Any increase in VE Table in this area makes no difference now. Explanation of Variables: Duty Cycle (%): The percentage of time the petrol injectors are open, determining the duration they spray fuel Max Duty Cycle - Injector Duty Cycle should normally not be over 80% (0. Just double check that you are logging the channel in the first place. *Battery voltage should also be considered when selecting a pump. IDC is an aftermarket value to represent the amount of time a fuel injector is energized (on, spraying fuel) during an engine cycle. 4. 5) so 800 flywheel hp running 80 percent duty cycle calls for a 1700cc injector. 66344gallons per hour of fuel If speed is 50mph then 50miles/hr / 4. Palm Beach Dyno tuned - juuuuuuuust a little over 385RWHP. My suspicion is that I'm making close to 300 flywheel hp at 14 psi And yes, I do need larger injectors. 6 @ 130 mph pass. 50 lb/hr/HP or 325 lb/hr of fuel needed for the engine. 165. Number of Cylinders. will use this information to give you the new flow rates. The amount of time an injector is turned on and delivering fuel is known as the duty cycle. (convert to cc per min by multiplying lb\min by 10. It is measured in pounds per hour (lb/hr). Later on if you want to increase the the engine HP, Jun 21, 2024 · So when we crunch the numbers we get 650 horsepower times 0. Works To Calculate the Correct Size Fuel Injectors for Gasoline and E85 Fuels. 5 lb per minute injector. 2004 Vette Coupe, LS2, MN6, Vararam, ARH/CATs, Ti's, 4:10, Trickflow 215, 30# SVO, Vette Apr 15, 2024 · The duty cycle of such a system is D = 1%. It works by estimating airflow based on a few known parameters, and then calculating fuel flow directly from exhaust lambda. Engine Type: Fuel Pump Units: Injector Flow Units: Number of Cylinders: The 0. Oct 23, 2018 · it has 1300cc injectors twin 044 pumps with a holley lift pump VP C16 race fuel and in my opinion is reaching a 100% injector duty cycle far to early ( around 550hp ) should be enough fuel for a 1000 hp when using the injector calculator built in to the Nira ECU, The car has been previously run with more power with the same hardware with no Mar 27, 2023 · Injector duty cycle is a calculation that represents what percentage of time the injector is open and flowing. Remember to use the same units for all quantities. Posts. Location. Check with your injector builder on where he thinks the maximum duty cycle is for you specific injectors. are some hints -. ex. 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 calculate your required flow rate use the flow calculator below. 1 second / 50 cycles = 20 ms total time available for each To determine how big your injector's flow rating should be, multiply estimated horsepower (HP) of your engine by the brake specific fuel consumption (BSFC)* and divide by the number of injectors and the desired duty cycle and you will get a rough estimate of injector size: InjectorSize = (HorsePower * BSFC) / (#Injectors * DutyCycle) for Choose a fuel pump that can flow. Typical injector limits for duty cycle is 80-85%. 85 should be your goal at full boost and maximum engine speed. Injector Flow Rate Lb/hr. 55 to . 50, Supercharged and Turbocharged engines will want to be at 0. 82 ( 12. Fuel Injection Calculations Use this page to estimate fuel injector size. 65] ÷ 8 = 50. Example: [(500 ÷ 0. The calculator. / hr. 100% duty cycle means the injector is open for one complete revolution of the crankshaft, hence you can go over but the recommendation is 80% max. We put together the following chart to illustrate what we consider to be the optimum injector Anything that reduces the fuel flow (dirty injectors, clogged fuel filter, failing fuel pump) would lead the closed loop fueling to try an increase the injector pulse width (and thus duty cycle) to compensate. Enter a injector size and we can give the max horsepower supported for the entered injector size. The fuel injector duty cycle (IDC) is the percentage of time the injector is supplied with power. 03/. C value. Graphs are provided to show the spread and range of some options to help plan your choice. Next, determine the period. 10 * 5. ** Limit maximum injector duty cycle to less than 90% for safe operation. The time during which the injector is powered (or activated) is called the injector pulse width (IPW). HP x BSFC) / (number of This calculator will generate pulsewidth values for specific rpms, from idle to peak speeds. = (Max. You can select between horsepower (HP) or kilowatt (KW). 3. Then, you still have some room for manoeuvre and your tuner can lower the duty cycle a bit. you can get 120's and an injector driver for $800I used that setup before and could have made 1000RW through a stick. Calculators – Injector HP/KW Rating Calculator. The Holley fuel injector calculator states that injector size (in cc/min) is equal to the (estimated horsepower x the brake Oct 19, 2009 · Last edited by RWTD; 10-19-2009 at 04:21 PM . 8) duty add inj pw bank 1 and 2 to you channel list then add injector duty cycle to chart. I would assume that would be times two for both banks? If so the factory injectors are plenty big for a 10. This is the amount of fuel we need to supply to the engine to achieve 500 hp. 60 to . Most injectors will max out at 80% duty cycle and this is the accepted industry standard. 703. May 9, 2016 · 85% is my typical line in the sand, however the modern EV14 based injectors seem to be able to tolerate higher constant duty cycles with no ill effect. 800x . * Brake Specific Fuel Consumption: is the amount of fuel consumed (in lbs. The Injector Dynamics fuel flow calculator is not based on efficiency. 02 = 20 milliseconds. An injector in an engine turns on and off very quickly to control the amount of fuel delivered. zj rp cu xo nv zr wt mb hj on