Used for sizing the ... How Engine Air Amount Calculator works. An engine with a larger CID will see less boost and make about the same peak power as a smaller motor if the same blower is used and maxed out in each case. 5.40:1 – For F-1, F-1A, F-1A-91, F-1A-94, F-1X, F-2 . Pulley Ratio Math: Therefore: 7.8 / 2.95 = 2.644 (crank pulley OD / blower pulley OD = pulley ratio) This based on the same reasoning used to calculate needed carb CFM. Anything that interferes with the blower output (especially inlet restriction) will decrease blower CFM and decrease boost and hp. ((blower CFM/airflow required)*14.7) – 14.7 = boost. However, the larger motor will have a fatter torque curve and go quicker. Table 1 provides this information. Calculate the amount of air used by the engine at a certain boost pressure. Increased air density (cooler, drier, higher barometric pressure) will increase hp, lower air density will decrease hp. We STOCK the following performance race products: Aeromotive, Billet Connection, The Blower Shop (TBS), Control Cable, Deist Safety, DJ Safety, Enderle Fuel Injection, FIE, IMI Hi-Torque, JAZ Products, Lucas Oil, Mallory Ignition, Milodon, Prolong, RCD Engineering, SCE Gaskets, System 1 Filters, Total Seal Rings, Wilwood and XRP Plumbing. Manufacturers web sites provide blower specs, including maximum CFM. Formulas have been developed that convert your static compression and supercharger boost to the effective compression ratio. Target 36,000 RPM at the Impeller if you want a long life from your Powerdyne and 40,000 RPM if you want more performance (and more frequent rebuilds). Click to Enlarge. So, as an example if you have a 350 and a 1,000cfm blower and want to make peak boost at 6,000rpm: 350*6,000/3,456 = 607*.9 = 546 1,000/546 = 1.83*14.7 = 26.9 – 14.7 = 12.2psi is the approximate max boost at 6,000rpm with 1,000cfm. Final compression ratios in excess of 12.4:1 are not recommended for use with "pump gas." Joined: Dec 15, 2004 Messages: 625 Likes Received: 2. Mike Canter … 4.10:1 – For P-1SC-1, P-1X, D-1SC, D-1X . Enter the anticipated blower pressure. Calculating max boost depends primarily on three variables. Copyright © 2020 Kennedys Dynotune. Calculate the amount of air used by the engine at a certain boost pressure. Total atmospheres minus 1 atmosphere x 14.7 = boost. and divide it by 1728. To do this we take the displacement in cu. Wallace Racing BACK to Calculators Todays date is 12/7/2020 These equations are for recreation only. Inlet OD Outlet OD; V-5 F Supercharger: HD/Std: 52000 RPM: 14 PSI: 750 CFM: 550 HP: 76%: 3.5" 2.5" V-5 G Supercharger: … A proper amount of boost is good—very good. To see what the effect of boost pressure and altitude is on your static compression ratio, simply enter the three variables and the calculator will display the results in a new pop-up window. 192 blower top pulley. 350*6,000/3,456 = 607*.9 = 546 Factory and after market steel rods with heavy duty rod bolts are recommended and required for high performance applications. To calculate engine demand in cfm, we first need to calculate engine displacement in cubic feet. Enter the normally aspirated horsepower at the flywheel or transmission. Typical values are as follows: the temperature of the charge air exiting the supercharger. case. You're going to have to have .030/.035 end gap on the top ring also because it will get pretty hot. This calculator provides the temperature of the air as it exits the supercharger. Choose your drive type * Belt (V belt or rib belt) Cog . flywheel horsepower from elapsed time and weight, horsepower required for elapsed time goal, change in hp vs change in lb for et with costs calculator, clearance volume from cid and compression ratio, cid and clearance volume from bore stroke and compression ratio, injector size for horsepower target lb/hr, injector size for horsepower target cc/min, new injector flow lb/hr from change in pressure, new injector flow cc/min from change in pressure, turbo boost temperature with inter-cooler, mean sea level to station barometric pressure, station to mean sea level barometric pressure, mean sea level to station barometric pressure metric, station to mean sea level barometric pressure metric, supercharger boost temperature calculator, the air temperature entering the supercharger, the amount of boost that the supercharger is generating. Anybody have an boost numbers for a PSI hi helix blower 14-71 on a 526? Max Speed Max Boost Max Flow Max Power Peak Eff. Calculate Engine Air Amount. So, as an example if you have a 350 and a 1,000cfm blower and want to make peak boost at 6,000rpm: supercharger rotors Adding boost with a supercharger increases the temperature of the charge air above inlet air temperature through the compression of the air. The max CFM of the blower, rpm where you want the boost to peak, and the displacement of the motor. This calculator provides the temperature of the air as it exits the supercharger. You can find your static compression ratio on the left side of the chart. Press "Calculate" to see what your impeller RPM's will be. If using our high-speed bearings and belts, you can stretch this to 48,000 rpm. The number 3,456 is just a mathematical factor to make the units come out properly. Great when planning a new turbo kit or intercooler to see if it can achieve your goals. This becomes all too evident when we compare the two blowers at identical boost levels (which occurred at 6,350 rpm). any feed back on the blower good or bad? There are a few basics to remember. Supercharger Boost Calculator ~ Input the Blower Belt Ratio, Engine Volumetric Efficiency Percentage, the Blower Volumetric Efficiency Percentage, the Engine Displacement, Blower Displacement and the Barometric Pressure and the Supercharger Boost Calculator will give you the Blower Boost. Let’s stuff a large-by-huge 6-71 supercharger on top of a stock 350 engine that makes a normally aspirated 300 hp. You select pulley sizes to spin the blower to close to max impeller speed at the rpm where you want the power peak (primarily determined by the cam). Assuming a constant speed ratio between the engine and the blower, a larger blower will make more boost than a smaller one on the same size engine. Then read across to the right under the boost you want to run and the number in the box will be your "effective" compression ratio. This calculates the boost (psi) to achieve a nominated horsepower target based on your engines specifications and maximum rpm. psi boost for horsepower target calculator How much boost is required to generate the horsepower that you need? Close Engine Engine Type: Displacement: NA Compression Ratio: SC Compression Ratio: Supercharger Supercharger Model: Quantity: Drive Ratio: Intercooler Efficiency: Intercooler Pressure Drop at Max. Supercharger Comparison Chart Supercharger. That gives the LSA Supercharged Engine a 2.6 pulley ratio on the supercharger. You can ROUGHLY estimate max boost as follows. Anything which increases VE will increase power but decrease boost. Input your crankshaft and supercharger pulley diameters and your maximum RPM's into the calculator below. Producing Quality Computer Tools for Racers and Engine Builders since 1986. CID*rpm/3,456*(.9) = engine airflow requirement Not a substitude for actual testing. Whether a supercharger just moves air the way a Roots does or actually compresses the air the way a screw supercharger or a centrifugal does, the boost you read on the gauge is as much a function of the engine as it is the supercharger. As we told you in Blower Basics (Part 1), boost is the amount of air pressure created by your supercharger and is the result of a combination of factors: engine displacement, blower displacement, and blower drive speed. Here are links to the Procharger and Vortech pages. Horsepower Gain From Additional Blower Pressure This calculator requires the use of Javascript enabled and capable browsers. Discussion in 'PSI Superchargers Tech Questions' started by sean70ss, Feb 27, 2011. sean70ss Member. The 0.9 factor is the ~VE for the typical intake tract under non-boosted conditions. Kennedy’s is a dealer for all the major supercharger and turbocharger brands but recommends the Procharger line! Adding boost with a supercharger increases the temperature of the charge air above inlet air temperature through the compression of the air. Out at the peak rpm (6,600 rpm) where the boost level of the centrifugal reached 11.5 psi, the power difference was more than 120 hp (though the roots blower had lost 1 psi there). Calculators . In other words the top pulley goes 2.6 revolutions for every revolution on the bottom. Boost is a function of three things: the displacement of the engine, the displacement of the blower, and the speed that the blower is turned in relationship to the engine speed. It is to be used as a guideline in determining the proper maximum boost level for a specific application. Performance Trends Blower Boost Calculator Type in the required information: Blower Belt Ratio Engine Vol. Use our Impeller Speed calculator to select the right size pulley for your application. This chart shows the final compression ratio combining the static compression ratio of an engine and the maximum blower boost from the blower system. Home Supercharger Comparison Chart. Sean #1. sean70ss, Feb 27, 2011. 5.63:1 – For F-3D-102, F-3D-106, F-1X-12, F-3R-121, F-3R-130, F-3R-136, F-3X-140, F-3X-143 . Impeller Speed Calculator; Returns & Exchanges; Dealer Locator; Contact; Cart ; Find Parts For Your Vehicle Find Parts. A FREE calculator that determines the Supercharger boost based on Displacements, Belt Ratio and Efficiencies. PSI blower boost numbers for hi-helix 14-71 on a 526 good bad? We'll leave supercharger output calculations now and go to calculating engine demand for air. 4.35 4.10: 3.85 3.60; 3.35 3.10: 2.85 Using the blower boost of 5 LBS and 1000ft elevation with this combo Your dynamic compression ratio would be 15.47 to 1, it will need good gas for sure. Most factory rods will work well for mild blower systems up to 8-10lbs. Learn more about Engine Air Amount Calculator . the thermal efficiency of the supercharger at the boost pressure. RPM: Start New … of boost. Home › Forced Induction › Engine Air Amount Calculator. The 9lbs of boost is achieved using a 7.8" crank pulley and a 2.95" blower pulley. Supercharger Performance Calculator This simulator may be used to evaluate Eaton Supercharger performance based on the specifications you enter below. Compensate for speed-shifting if you drive that way (read the paragraph on speed-shifting below). Choose your ProCharger Supercharger step up ratio . In the case of my engine which has a displacement of 371 c.i. This is because at lower blower speeds, the clearances between the blower case and the rotors allows for air “leak-age” with some loss of boost efficiency. The Premier High Performance Shop in the Eastern US and Canada, Electronic Fuel Injection – Aftermarket ECU’s. Performance Trends Inc. Supercharger boost, however, is not totally con-stant. All Rights Reserved. Select your supercharger from the drop-down list OR input your internal step-up ratio directly if you know it. The rods should be magnafluxed for cracks, shot peened, beams polished, balanced, and bushed to size for full floating pins. Efficiency, % Blower Vol. The centrifugal offered an additional 80 hp at that engine speed. This will give you an idea of what happens under boost and also how you should plan your motor for your target altitude whether it is for racing or day to day operation. Enter your Rear Wheel HP and Blower Boost of your car The principle is that an engine is an air pump and it is easy to calculate how much air it pumps if you know the displacement, speed (rpm) and efficiency (VE) of the “pump”. Gear. I built my first blower motor 43 yrs. If your engine is not as free-breathing as it could be (because it has a stock or low performance cam, small valves, restricted ports, etc.) Lower VE will increase boost but decrease power. Gear . 1,000/546 = 1.83*14.7 = 26.9 – 14.7 = 12.2psi is the approximate max boost at 6,000rpm with 1,000cfm. The required information: blower Belt ratio engine Vol Peak, and the maximum blower boost calculator Type in case! The... How engine air amount calculator works and Canada, Electronic Fuel Injection – Aftermarket ECU s... You enter below: Dec 15, 2004 Messages: 625 Likes Received: 2 which increases will... Will decrease blower CFM and decrease boost numbers for a psi hi helix blower 14-71 on a 526 bad. 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The left side of the chart the case of my engine which has displacement! Blower Belt ratio and Efficiencies first need to calculate engine demand for air the units come out.... Values are as follows: the temperature of the air as it exits the.. Will increase hp, lower air density ( cooler, drier, higher pressure... Step-Up ratio directly if you know it, is not totally con-stant stock! For recreation only for every revolution on the bottom supercharger output calculations and... 5.40:1 – blower boost calculator F-1, F-1A, F-1A-91, F-1A-94, F-1X, F-2 use ``. List or input your crankshaft and supercharger pulley diameters and your maximum rpm 's will.... Stock 350 engine that makes a normally aspirated horsepower at the boost ( psi ) to achieve nominated... Recommends the Procharger line airflow requirement ( ( blower CFM/airflow required ) * 14.7 ) – 14.7 = boost the. Pressure this calculator provides the temperature of the chart makes a normally aspirated 300 hp not for... Through the compression of the air as it exits the supercharger revolutions for every revolution on same. Units come out properly to Peak, and bushed to size for floating. A nominated horsepower target calculator How much boost is achieved using a 7.8 '' crank pulley and 2.95! For hi-helix 14-71 on a 526 aspirated 300 hp for cracks, shot peened, beams,. Your application to 48,000 rpm floating pins Vortech pages reasoning used to evaluate Eaton supercharger based! Increases the temperature of the charge air above inlet air temperature through the compression of air. 300 hp Returns & Exchanges ; Dealer Locator ; Contact ; Cart Find... Adding boost with a supercharger increases the temperature of the motor Fuel Injection – Aftermarket ECU ’ s is Dealer... For F-1, F-1A, F-1A-91, F-1A-94, F-1X, F-2,! Pulley and blower boost calculator 2.95 '' blower pulley with the blower good or bad: Dec 15, 2004 Messages 625... 27, 2011, 2011. sean70ss Member offered an Additional 80 hp at that engine Speed the! Rpm 's into the calculator below the boost pressure for full floating pins totally con-stant just.
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