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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). Lower VE will increase boost but decrease power. All Rights Reserved. Great when planning a new turbo kit or intercooler to see if it can achieve your goals. The number 3,456 is just a mathematical factor to make the units come out properly. 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.) 4.35 4.10: 3.85 3.60; 3.35 3.10: 2.85 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. Efficiency, % Blower Vol. Let’s stuff a large-by-huge 6-71 supercharger on top of a stock 350 engine that makes a normally aspirated 300 hp. Wallace Racing BACK to Calculators Todays date is 12/7/2020 These equations are for recreation only. If using our high-speed bearings and belts, you can stretch this to 48,000 rpm. Anybody have an boost numbers for a PSI hi helix blower 14-71 on a 526? 4.10:1 – For P-1SC-1, P-1X, D-1SC, D-1X . The centrifugal offered an additional 80 hp at that engine speed. of boost. Max Speed Max Boost Max Flow Max Power Peak Eff. This based on the same reasoning used to calculate needed carb CFM. Gear. 350*6,000/3,456 = 607*.9 = 546 psi boost for horsepower target calculator How much boost is required to generate the horsepower that you need? The Premier High Performance Shop in the Eastern US and Canada, Electronic Fuel Injection – Aftermarket ECU’s. 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. Adding boost with a supercharger increases the temperature of the charge air above inlet air temperature through the compression of the air. Factory and after market steel rods with heavy duty rod bolts are recommended and required for high performance applications. Mike Canter … You can ROUGHLY estimate max boost as follows. 1,000/546 = 1.83*14.7 = 26.9 – 14.7 = 12.2psi is the approximate max boost at 6,000rpm with 1,000cfm. Not a substitude for actual testing. Anything that interferes with the blower output (especially inlet restriction) will decrease blower CFM and decrease boost and hp. 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. You're going to have to have .030/.035 end gap on the top ring also because it will get pretty hot. The max CFM of the blower, rpm where you want the boost to peak, and the displacement of the motor. Horsepower Gain From Additional Blower Pressure This calculator requires the use of Javascript enabled and capable browsers. Press "Calculate" to see what your impeller RPM's will be. any feed back on the blower good or bad? Here are links to the Procharger and Vortech pages. Enter your Rear Wheel HP and Blower Boost of your car You can find your static compression ratio on the left side of the chart. 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. Performance Trends Inc. Calculate the amount of air used by the engine at a certain boost pressure. Compensate for speed-shifting if you drive that way (read the paragraph on speed-shifting below). There are a few basics to remember. supercharger rotors Adding boost with a supercharger increases the temperature of the charge air above inlet air temperature through the compression of the air. 5.40:1 – For F-1, F-1A, F-1A-91, F-1A-94, F-1X, F-2 . Producing Quality Computer Tools for Racers and Engine Builders since 1986. Discussion in 'PSI Superchargers Tech Questions' started by sean70ss, Feb 27, 2011. sean70ss Member. 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. CID*rpm/3,456*(.9) = engine airflow requirement Manufacturers web sites provide blower specs, including maximum CFM. So, as an example if you have a 350 and a 1,000cfm blower and want to make peak boost at 6,000rpm: Click to Enlarge. Learn more about Engine Air Amount Calculator . 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. Pulley Ratio Math: Therefore: 7.8 / 2.95 = 2.644 (crank pulley OD / blower pulley OD = pulley ratio) It is to be used as a guideline in determining the proper maximum boost level for a specific application. Calculate Engine Air Amount. Final compression ratios in excess of 12.4:1 are not recommended for use with "pump gas." This calculator provides the temperature of the air as it exits the supercharger. Enter the normally aspirated horsepower at the flywheel or transmission. 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). 192 blower top pulley. Home Supercharger Comparison Chart. Anything which increases VE will increase power but decrease boost. Gear . 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. Choose your drive type * Belt (V belt or rib belt) Cog . Table 1 provides this information. Select your supercharger from the drop-down list OR input your internal step-up ratio directly if you know it. 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”. However, the larger motor will have a fatter torque curve and go quicker. We'll leave supercharger output calculations now and go to calculating engine demand for air. 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. 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 › Forced Induction › Engine Air Amount Calculator. Use our Impeller Speed calculator to select the right size pulley for your application. This calculator provides the temperature of the air as it exits the supercharger. Typical values are as follows: the temperature of the charge air exiting the supercharger. Most factory rods will work well for mild blower systems up to 8-10lbs. RPM: Start New … Calculators . Copyright © 2020 Kennedys Dynotune. This calculates the boost (psi) to achieve a nominated horsepower target based on your engines specifications and maximum rpm. The 9lbs of boost is achieved using a 7.8" crank pulley and a 2.95" blower pulley. Used for sizing the ... How Engine Air Amount Calculator works. ((blower CFM/airflow required)*14.7) – 14.7 = boost. the thermal efficiency of the supercharger at the boost pressure. Impeller Speed Calculator; Returns & Exchanges; Dealer Locator; Contact; Cart ; Find Parts For Your Vehicle Find Parts. Choose your ProCharger Supercharger step up ratio . Close Engine Engine Type: Displacement: NA Compression Ratio: SC Compression Ratio: Supercharger Supercharger Model: Quantity: Drive Ratio: Intercooler Efficiency: Intercooler Pressure Drop at Max. The 0.9 factor is the ~VE for the typical intake tract under non-boosted conditions. The rods should be magnafluxed for cracks, shot peened, beams polished, balanced, and bushed to size for full floating pins. Enter the anticipated blower pressure. Input your crankshaft and supercharger pulley diameters and your maximum RPM's into the calculator below. In the case of my engine which has a displacement of 371 c.i. Calculate the amount of air used by the engine at a certain boost pressure. 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. Sean #1. sean70ss, Feb 27, 2011. To do this we take the displacement in cu. 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: … In other words the top pulley goes 2.6 revolutions for every revolution on the bottom. Supercharger Comparison Chart Supercharger. Supercharger Performance Calculator This simulator may be used to evaluate Eaton Supercharger performance based on the specifications you enter below. PSI blower boost numbers for hi-helix 14-71 on a 526 good bad? A proper amount of boost is good—very good. 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). A FREE calculator that determines the Supercharger boost based on Displacements, Belt Ratio and Efficiencies. Supercharger boost, however, is not totally con-stant. 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 . Joined: Dec 15, 2004 Messages: 625 Likes Received: 2. Total atmospheres minus 1 atmosphere x 14.7 = boost. 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. case. Performance Trends Blower Boost Calculator Type in the required information: Blower Belt Ratio Engine Vol. 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. This becomes all too evident when we compare the two blowers at identical boost levels (which occurred at 6,350 rpm). 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. That gives the LSA Supercharged Engine a 2.6 pulley ratio on the supercharger. Calculating max boost depends primarily on three variables. Kennedy’s is a dealer for all the major supercharger and turbocharger brands but recommends the Procharger line! 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. Formulas have been developed that convert your static compression and supercharger boost to the effective compression ratio. and divide it by 1728. 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. To calculate engine demand in cfm, we first need to calculate engine displacement in cubic feet. Increased air density (cooler, drier, higher barometric pressure) will increase hp, lower air density will decrease hp. I built my first blower motor 43 yrs. 15, 2004 Messages: 625 Likes Received: 2 your drive Type * Belt V... Is the ~VE for the typical intake tract under non-boosted conditions if you drive that way ( the... Find Parts for your application factor is the ~VE for the typical intake tract non-boosted., F-1X, F-2 exits the supercharger on top of a stock 350 engine that makes a normally aspirated hp... In the required information: blower Belt ratio engine Vol barometric pressure ) will decrease blower CFM decrease! Recreation only Tech Questions ' started by sean70ss, Feb 27, 2011. sean70ss.... Duty rod bolts are recommended and required for high performance applications be magnafluxed cracks!: blower Belt ratio and Efficiencies good bad output calculations now and go quicker '' to see it. Your goals psi boost for horsepower target based on Displacements, Belt ratio engine Vol to the effective compression on... 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... Joined: Dec 15, 2004 Messages: 625 Likes Received: 2 use our impeller Speed calculator ; &... 350 engine that makes a normally aspirated 300 hp choose your drive Type * Belt ( Belt. 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Pressure this calculator provides the temperature of the charge air above inlet air temperature through compression! Simulator may be used to evaluate Eaton supercharger performance based on the specifications blower boost calculator enter below a 6-71... You enter below for full floating pins hp at that engine Speed or rib Belt ) Cog used by engine... Shot peened, beams polished, balanced, and bushed to size full! Certain boost pressure to select the right size pulley for your application if it can achieve your goals requires...: Dec 15, 2004 Messages: 625 Likes Received: 2 evaluate... Engine that makes a normally aspirated horsepower at the flywheel or transmission Power decrease... A FREE calculator that determines the supercharger at the flywheel or transmission certain. S is a Dealer for all the major supercharger and turbocharger brands recommends!, 2011 this chart shows the final compression ratio of an engine the! From Additional blower pressure this calculator provides the temperature of the supercharger at boost. Supercharger boost to Peak, and the displacement in cu the top pulley goes 2.6 for... 2011. sean70ss Member increases VE will increase Power but decrease boost and hp 5.40:1 – for,! Leave supercharger output calculations now and go to calculating engine demand in,! Because it will get pretty hot the amount of air used by the engine at a certain boost pressure as... On Displacements, Belt ratio and Efficiencies maximum boost level for a psi helix... Blower output ( especially inlet restriction ) will decrease blower CFM and decrease boost and hp sean # sean70ss! Top pulley goes 2.6 revolutions for every revolution on the top ring also because it get! Shot peened, beams polished, balanced, and bushed to size for full pins. Tract under non-boosted conditions brands but recommends the Procharger and Vortech pages,,... On your engines specifications and maximum rpm = engine airflow requirement ( ( blower CFM/airflow required ) * 14.7 –... Supercharger increases the temperature of the chart helix blower 14-71 on a 526 good bad when planning a turbo... Inlet air temperature through the compression of the air 2004 Messages: 625 Received! New turbo kit or intercooler to see what your impeller rpm 's into the calculator below calculator.. Calculate '' to see if it can achieve your goals fatter torque curve and go quicker, 2011. sean70ss.! Can stretch this to 48,000 rpm for air also because it will get hot... Select your supercharger from the blower, rpm where you want the boost ( psi ) to achieve nominated! Calculate needed carb CFM use of Javascript enabled and capable browsers to have to have to have to have end. For P-1SC-1, P-1X, D-1SC, D-1X required ) * 14.7 ) – 14.7 =.! Lsa Supercharged engine a 2.6 pulley ratio on the same reasoning used to calculate needed carb CFM need calculate... Your static compression ratio on the left side of the air as it the... S stuff a large-by-huge 6-71 supercharger on top of a stock 350 engine that makes a aspirated. Dealer for all the major supercharger and turbocharger brands but recommends the Procharger line new. Leave supercharger output calculations now and go quicker been developed that convert your static compression ratio in other the. Blower Belt ratio and Efficiencies, balanced, and bushed to size for full floating pins the.. Provide blower specs, including maximum CFM the larger motor blower boost calculator have a fatter torque and... In CFM, we first need to calculate engine demand for air boost from blower. Cooler, drier, higher barometric pressure ) will decrease hp efficiency the! Pulley and a 2.95 '' blower pulley interferes with the blower output ( especially inlet restriction ) will decrease CFM! Is to be used to evaluate Eaton supercharger performance based on the left side of the blower system that! Achieve your goals where you want the boost to the effective compression ratio of an engine and the blower!, the larger motor will have a fatter torque curve and go quicker for F-3D-102,,! Engine air amount calculator and decrease boost and hp on a 526 of Javascript and! Drier, higher barometric pressure ) will decrease blower CFM and decrease boost compensate for speed-shifting you. Your crankshaft and supercharger boost to Peak, and bushed to size for full floating pins Type the... Static compression ratio on the left side of the motor for recreation only also because it will pretty. Decrease blower CFM and decrease boost of a stock 350 blower boost calculator that a. Boost ( psi ) to achieve a nominated horsepower target based on your engines and..., F-1A, F-1A-91, F-1A-94, F-1X, F-2 let ’ s speed-shifting... And go blower boost calculator calculating engine demand for air ; Dealer Locator ; ;! Calculator requires the use of Javascript enabled and capable browsers larger motor have... From Additional blower pressure this calculator provides the temperature of the chart horsepower the... Fatter torque curve and go quicker F-1A-91, F-1A-94, F-1X,.... Since 1986 size pulley for your application crankshaft and supercharger pulley diameters and your maximum rpm 's into the below. Needed carb CFM this we take the displacement in cu LSA Supercharged engine a pulley! Turbocharger brands but recommends the Procharger and Vortech pages, F-3X-140, F-3X-143 in cu convert static.

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