How much cfm for 500 hp Use this table as a starting point: When in doubt, go for higher cfm. I'm getting 590 HP with a moderate build and 650 HP with a more serious setups. 3 kW of power. I was wondering if there is a way to figure out what the best size carburetor is I had a 750 cfm and it was surging too much at slow speeds. In this article, we are going to show you how to calculate th Sep 16, 2004 · C4 Tech/Performance - Is there a formula to calculate gains in HP by the increases in air flow? - In other words, a formula that says X amount of increase cfm = x amount of HP? With this chart, you can now easily answer questions like this: How many CFM do I need for 500 sq ft? 333 CFM, as per the chart. 0-liter (302 cubic inches) or larger should use an electric fan with 2,800 or more cfm. Traditional ham-fisted hotrodders absolutely insist that 750 cfm is required, but it will only give you a few extra HP and the expense of part throttle manners and torque in the mid RPMs. It is usually measured in gallons per hour (gph) or liters per hour (lph). Nov 16, 2009 · Dual exhaust CFM/HP estimate? by illfish » Mon Nov 16, 2009 6:15 pm Does anyone have HP numbers that are supported with dual 2. CFM determines how much power the air compressor provides to air tools. May 29, 2002 · The HP numbers the manufacturers quote are just hype to sell the product. Will cool right down to 170/180 as soon as I start moving again. This is the intake volume. 700 Ported Motown single plane to match Mar 14, 2024 · While the small block 302 is known for its reliability and compact performance, the thin-wall casting cannot support much more than 500 hp. 19 x 1. Fuel Pump Free Flow Carbureted Engine Carbureted w/ Power Adder Fuel Injected Engine Fuel Injected w/ Power Adder 30 gph/114 lph 350 hp 300 hp 300 hp 250 hp 40 gph/155 lph 450 hp 400 hp 400 hp 300 hp 50 gph/190 lph 600 hp 500 hp 500 hp 400 hp Apr 7, 2015 · I have spent this past winter rebuilding my 350 small block Chevy engine. 73's. 2 = 1100 CFM for NA power. How do I know what flow rate I need? Minimum flow rate needs can be calculated by multiplying peak horsepower by BSFC. Or would I better suited with a 600 cfm Edelbrock? Nov 27, 2013 · When it comes to sizing filter elements, bigger is always better. 746) / (229 × 0. For a first-generation small-block Chevy, that's a Mar 26, 2023 · Kerrynzl Member from Tauranga, New Zealand You need 1. 5 to 1 compression, . If you try this formula yourself, be honest with how much rpm the engine will see. Jun 16, 2014 · IMO the radiator you have will not do the job no matter what CFM fans you use. Apr 30, 2018 · Go to Holley's website and see the carb sizing graph Hell even NASCAR ONLY used a 390 cfm carb. 88 valves Edelbrock Victor series intake 4500 carb flange 3000-7500 rpm range Holley 750 double pumper Hooker Super Comp Aug 16, 2022 · You can use a calculator online to find your exact CFM based on RPM and efficiency, but having been a Ford man pretty much my whole life, I already know the answers to your questions: For street use with stock heads and cam, go with a 500 CFM carb with annular boosters. 6944 HP = CFM /0. Add 150 shot and voila! 500hp. Lower CFM fans caused overheating, so I know there is no margin for more HP generating heat. Need help sizing your compressor? Check out our air compressor sizing guide and then shop for your new compressor. Jul 25, 2020 · ^^^^^^^^^ Me too, but if I was running 500 hp or better, fans might be the way to go. Now remember that because you're using dual exhaust and therefore will have two exhaust pipes (left and right) then you need to divide this total CFM figure by2. The CFM (Cubic Feet per Minute) Calculator is a valuable tool for determining the appropriate carburetor size for your engine. And GM fitted a 750 cfm , standard, why would they do that? NASCAR used the smaller carb to restrict HP . CFM listings are also suspect as they are not always checked using the same equipment or criteria. I'm currently running a custom dual fan setup that supposidly pulls 4000 cfm through a 27" x 19" griffon radiator. A radiator only works if there is airflow through the radiator core. At 14. That’s the answer to the question: What CFM do I need for my HVAC system to do its job? This answer of 350-400 cubic feet per minute for each 12,000 BTUs of AC cooling is optimal for the system to run efficiently while adequately cooling and dehumidifying the space. If you run the calculator again, you will get a little over 400 hp. When dynoed with a 600 holley we lose 40 HP+. An undersized carburetor will restrict airflow, leading to subpar engine performance, whereas an oversized carburetor can introduce excessive air, complicating Oct 26, 2007 · For instance if I had a set of XYZ brand heads that had a port size of X cc's and flow y CFM and I wanted to know if THAT head would support 800 HP at 8,000 RPM how would I know. pressure ratio. This calculator needs your engine capacity & your desired boost pressure in PSI at your desired RPM. CFM to HP calculations are essential for determining the power output of an engine. And what kind of motors achieve highest hp/cfm. Oct 1, 2025 · This turbo size calculator gives the numbers you need to analyse turbo compressor maps so you can find a good turbo for your engine. Something along the lines of 282 ADV. After some research I find the age old HP x 2. It should be noted that the actual values can differ since we are taking some approximations and estimates. If you need a bit of advice about the Sep 28, 2011 · C3 Tech/Performance - Who has 500 horsepower with an electric fan? - I had a mishap recently, where I threw my balancer through the hood at 7000 rpms, and am still in the process of fixing thingsOne thing leads to the next, Right now I've installed a new radiator support, got Dewitt to make a 1 1/4 inch tube Jan 30, 2016 · 2x hp is a rule of thumb better than that old formula that makes everyone afraid of running more than a 500 cfm carb If you really want to know. Fuel Injector Size Fuel injectors are the main factor in both minimum and maximum horsepower rating of EFI systems. Holley recommended the 830HP. Sep 7, 2011 · Just wondering how much horsepower is possible per cylinder head cfm, naturally aspirated. In choosing May 17, 2011 · I'd go with a standard 1850 600 cfm, with kickdown if you need it. He has at his disposal a Quick Fuel 1000cfm Holley, it runs no faster anyplace than the q-jet. 0, 24x19in (not including tanks) above behind seats, dual 15in spall fans VA08-AP71/LL 3682 CFM, Fan shroud mounts fans tank to tank could not sustain more heat for racing. Nov 28, 2006 · To make a reliable 500-550 HP in an LS you don't need a 6. This is my rationale for stating that a 600 cfm carb is too small for a big ford. I live in Tucson Aug 14, 2012 · As a general rule of thumb, follow these minimum cubic feet per minute (cfm) ratings when using an electric fan as the primary cooling source on a basic engine: 1,250 cfm for a 4-cylinder 2,000 cfm for a 6-cylinder 2,500 cfm for a 8-cylinder Engines that are 5. 3 500 CFM of air at 100 psi with 80% efficiency requires approximately 203. Mar 8, 2011 · How much hp can a quadrajet support?One of our customers uses a later model large cfm unit at 750hp. The same 750 HP small block in NASCAR trim suddenly becomes a $40,000 engine, and they don't even have a $5,000 fuel injection system! So why is the NASCAR engine so much more expensive for the same amount of power? That's simple. I have not found a write up showing this type of adjustment. If we need a higher pressure, say 125 psi, this rule of thumb doesn't work anymore - we will need more HP to compressed to 125 psi with the same output. For modified ones with higher volumetric efficiencies, 500 CFM carburetors are usually recommended. How many CFM do I need to keep it cool. More airflow won’t cause an issue. JMO I can't come close to that with a 4412 carb my best is 430 tq and 415 hp , 11-1 cr , 2101 intake , flat tap mech cam, with 200 cc Dart head unaltered on Sunoco 110 fuel. Feb 1, 2020 · After all, Chrysler didn't feel shy about 1,200 CFM on a 6-pack Of course around town the 500 CFM center carb does all the work. Given a certain engine displacement and certain other factors you can calculate how much boost will be required to achieve a stated level of horsepower. Mar 4, 2020 · The same engine with only 450 hp only needs around 230 cfm at 6000rpm and if the exhaust flow is 213cfm, that's 92% ratio. 0, you need a turbo or blower. In order to determine what size compressor you need, you first need to take note of the PSI and CFM requirements of your specific air tools. flow to fill the cylinders. so fit a smaller carb and reduce your HP. So with this known I use a generous 500HP x 2. An undersized carburetor will restrict airflow, leading to subpar engine performance, whereas an oversized carburetor can introduce excessive air, complicating Nov 1, 2008 · Check out what it takes to get 500hp out of a 327 Small Block Chevy Engine with this build from JGM Performance Engineering, only at Chevy High Performance Magazine. theres a big difference between a 500 HP 454 and a 600 HP 454 A fellow TCer built my motor exactly,but with 2. Download our results and data sheets. flex fan to a electic fan. Feb 16, 2011 · The combo will repeatedly make 380 plus hp and almost 500 pound feet. CFM Rating Electric fans are classified by cubic feet per minute (cfm). 7 atmospheric pressure those heads probably flow about 100cfm. Then it's off to the compressor maps to check airflow v. Sep 18, 2018 · When making big horsepower on the street, keeping your engine cool is essential. 304Carburetor: 850-cfm Holley HP, Race Demon, 800-cfm Q-jetIntake: Edelbrock Performer, PN 2115Heads: Stock 950 cast-iron heads, heavily ported 2. Edelbrock claims the Vic Jr small block heads "are good for 500HP" and AFRs web site has some real inflated dyno numbers for their heads. Hoping for 880 HP Ive had some conflicting info Thanks Jan 29, 2019 · Even with about a 10% cushion, a 500 CFM carburetor will handle this engine great. 06/1. I'll be replacing a ZZ4/2004R combo. Dual, single,gt500,mark VII ETC. I know there are ballpark formulas out there, but I'm wondering real world what kind of hp has been achieved per given cfm. The question is, do we know the required cfm for our carburetor, and, if not, how to calculate the cfm of your engine? This engine cfm calculator gives you an idea of the carburetor size you need for your engine! Nov 20, 2014 · We take a junkyard 454 shortblock, and without taking it apart, build a new top end and other parts to make a 700 HP big-block for less than 2500 dollars. Will I need higher cfms to keep this A 10 HP unit will output around 40 to 50 cfm at 100 psi. 00 % Volumetric Efficiency PerCent May 13, 2014 · Holley Performance’s Ultra HP 2-barrel carburetors were originally designed for the rules-restricted world oval track racing, but they can also work on other engines as well. Thanks in advance. . For example, a 1,600 cc motor in a good state of tune requires about 54 cubic feet per minute to make 78 horsepower. Oct 31, 2021 · Does a die grinder require low or high CFM? Speedaire 4B247 swapped with 2Z499 and its effect on CFM? 20 CFM Air Compressor – Buying, Hiring, What Can They Run? Air Compressors That Produce 500 CFM And Above CFM SCFM PSI Compressor Flow Issues Ingersoll Rand Type 30 model 242 HP and CFM? CFM rating of Black Max compressor What size air Sep 11, 2014 · 400hp LQ4 6. ** Return line only needed if using a By-Pass regulator such as the 12-803BP Jul 22, 2023 · Does Tank Size Affect CFM? The tank size of an air compressor indeed affects the CFM (cubic feet per minute) output and performance of the compressor. all have an influence but say a dual 3" will support up to ___ HP? And a 2. Apr 17, 2020 · Marlan, I have a 1971 Datsun 240Z with the LS3-based, 6. 5% is used for VE%, it would be The Formula: CFM to HP Conversion To convert CFM to HP, a simple equation is used: Horsepower (HP) = CFM × 1. How do I convert CFM to kW? To convert CFM to kW, follow these steps: Determine the air flow rate in CFM Measure the air pressure in psi Estimate the system efficiency Apply the conversion formula Calculate Apr 12, 2023 · If an air compressor generates 4 CFM of compressed air at 90 PSI, how much does it generate at 50 PSI, for example? That’s what this page is all about—calculating CFM output at various pressure levels for air compressors! | How to Calculate CFM of Compressor | CFM vs PSI – Air Volume vs Pressure | #aircompressor #compressedair #PSI Sep 26, 2009 · Anyone know how to compute CFM needed for 500 - 600 HP? My throttle body is stock 48mm unit. The 58 would need to pull manifold to bore openings to handle the 58mm opening. 125 Cubic Inches @ 6000 RPM with 100. Example of a question LearnMetrics’s received: We have a 300 square foot standard bedroom. Convert Cubic Feet per Minute (CFM) to Horsepower (HP) with our easy-to-use calculator. Magazines also have pie in the sky HP numbers which depend on how much advertising Dec 1, 2004 · . Size Electric fans are listed by diameter. So for stock 350s, you will generally want a carburetor rated at around 445 or 450 CFM. His car runs high 9's in the 1/4 mile at 136mph. Aug 5, 2019 · I currently have a 1962 283 with a stock 57 intake and Carter WCFB 4 bbl carb in my 57 Belair. comes out to 410. 5" and 3" exhausts. CFM stands for cubic feet per minute, which is a measure of the volume of air that an engine can intake in one minute. 5 CFM per engine horsepower, and your exhaust system needs to flow 2. This chart shows the Jan 28, 2010 · so how much cfm would you recommend for this application, it is a street/strip car, and it will sit in traffic sometimes. which wil work best for me and my 4row Afco aluminum fan? Jan 12, 2024 · What Is CFM? If you haven’t really used leaf blowers much in the past, then you might not even be familiar with the term CFM. 99BlackBirdT/A's (on LS1Tech ) manifold test provide some good data from a "300 cfm" head for the LS engines. Nov 18, 2023 · When selecting an air compressor, knowing how much air you need to power your tools is crucial. This with a 750 vac sec holley with the short yellow spring or the white one. It outputs the pressure ratio, lbs/min and CFM numbers which can then be plotted onto turbo compressor maps. HP, on the other hand, stands for horsepower, which is a measure of the engine’s power output. 5 vacuum Aug 9, 2019 · We did almost 400 hp with a 355 for Wisota with junk truck heads, 9. OR you'll have to buy parts much bigger than you truly need to compensate, if that makes sense. Apr 2, 2022 · Considering these values, the CFM rounds up to 445. 2 days ago · Wallace Racing BACK to Calculators This calculator can be used to see what the cubic feet per minute (CFM) would be needed for an engine of a certain size (CID) and at a certain RPM. What is CFM? Short for cubic feet per minute, CFM measures the volumn of air moved within a minute. Nov 5, 2017 · I'm doing a 454 budget build & I was wondering if it was possible to get in the 450-500 hp range with the setup I have so far Stock block/bore/stroke 781 heads w/ 2. I have seen some manifolds percentage losses test on classic Pontiac engines. 600-. The Qjet is the single most accurately metering carb ever; aftermarket or factory. An electrical fan provides constant airflow even when the engine is idling, when your engine needs it the most and since they are electric, they do not affect engine horsepower or fuel economy. or tune what you have to run right (only works if the carb was sized for the combination you Convert Horsepower (HP) to Cubic Feet per Minute (CFM) with our easy-to-use calculator. CFM stands for cubic feet per minute and MPH stands for miles per hour. I am trying to size a carb for a street engine 750 hp big block 557 Ford. 0L Ford with various power adders and build combinations, but to Quincy is the first in the industry to test and publish according to the US Energy Conservation Standards for Air Compressors. It will help you choose the correct turbo for your Here's a good comparison. Mar 24, 2020 · So, using your Google-Fu you type "How much power can a 650 cfm carb support?" Well, chances are that you'll get answers in the 450-470 hp range, but that's not really the right way to look at it. These calculations are for port work with no 'choke'. Calculate the horsepower (HP) required for your fan system by entering the airflow (CFM), fan efficiency, and pressure. 08's for 3. Nov 8, 2022 · I found this on the Summit racing website. CFM = Velocity (feet per minute) x Area (square feet) How much CFM do you need? Total Cubic Feet (volume of Jul 27, 2005 · Hey everyone, what cfm does a fan setup need to pull in order to cool a big block? I have heard around 4000 cfm, some have said around 5000 cfm. The Calculation for Max Horsepower is straight forward. If you know how much horsepower your motor makes, you can estimate its air flow in cubic feet per minute (CFM). It indicates how much air flows through a space or is pushed by a fan, blower, HVAC system. My question, is a 500 cfm big enough for cruising? No racing strictly cruising! Jul 17, 2019 · Pulling this off on a 500 cfm two barrel takes humongous attention to every detail and probably some careful rule "stretching". 500 NA makes for a tough driver NA, but with boost, it's like a stock motor until you hit the loud pedal. The formulas are: CFM = HP *0. i have been looking at a Derale 4000cfm fan, do you think this would be enough Sep 23, 2013 · To get close to 1. I'm having a 1968 327 rebuilt to stock 275 hp this week. You can be sure this isn't using a 1971 LT-1 block, camel hump heads, and pink rods. Calculate your engine's airflow needs with our Engine CFM Calculator for optimal performance and efficiency. 2 hp/ci, the machine work has to be good, head flow has to be good. Apr 29, 2015 · Who offers the best/highest cfm electric radiator cooling fan set up for 500rwhp+ engines? I have a 15" one now but there is a lot of radiator not covered. 67 cfm per Hp at wide open throttle. Pro Stock, Stock Eliminator, Sprint cup, Limited Late Model classes? I have a two acre flat lot with many mature trees (sycamore, maple, cherry) and after much research and consultation with friends in the business, I bought an Echo 580 in early September (579 CFM). Oct 25, 2017 · Is the CFM going to limit RPM to the point where HP would also be limited? Is 500 HP an unreasonable expectation? For this application, max RPM would be 6500. The constant 1. A 750 HP small block Chevy Sprint Car engine is about a $15,000 engine. Understand the relationship between air flow and power in air compressors. Sep 15, 2018 · Example. What carb would you guys Jul 6, 2016 · The 383 is getting close to being done. Unfortunately, there’s no one size fits all answer to this question. Feb 27, 2017 · For most street rods and customs yielding 350-500 hp, 3/8 inch is plenty. (The RPM of the engine could only use that much CFM) If 127. Edit : if you run that calculator at 28", and 185 cfm to account for the intake manifold, you get a realistic 351 hp. If you use 100% (or less) for the volumetric efficiency (VE %) it would be what the CFM would be calculated for that RPM. This tool helps you determine the motor power needed to run your fan efficiently. If you can squeeze a 14-inch diameter air cleaner base on your carbureted or throttle body EFI engine combination, … Dec 1, 2016 · C3 Tech/Performance - Carb recommendation for a 500hp 383? - Hello all, Back to the forum after an extended absence. Jun 16, 2025 · Understanding how to calculate CFM in your home can help you determine how much airflow you need to regulate temperature and maximize HVAC efficiency. This calculator uses the formula: Convert Horsepower (HP) to Cubic Feet per Minute (CFM) with our easy-to-use calculator. Horsepower (HP) is the measurement of the motor's power output that drives the air compressor pump. What do you guys think. One was 379 hp, and one was 392 hp. Fan CFM to HP Calculator: Calculate Horsepower Calculate the horsepower (HP) required for your fan system by entering the airflow (CFM), fan efficiency, and pressure. Oct 18, 2011 · General Q & A - 750 carb good for 500hp - Is a 750 cfm carb big enough to support 500 hp Apr 27, 2009 · Ok getting closer, 2,800 ish for 250 HP. Dec 11, 2010 · Re: How much hp can 280 cfm support? by Raceheads. It seems to work well but higher CFM (800-1000) is desirable. or 1,100 divided by 2=550 CFM. 2L, LS376/480 crate engine in it (current version GM PN 19370411; 495 hp at 6,200 rpm, 473 lb-ft at 5,000 rpm —Editor). Oct 1, 2025 · What these calculators can do Assess the performance of an existing intercooler **or** find the correct size of a new intercooler and intercooler pipe diameter for a given engine CFM flow or power output eg 300 hp, 400 hp, 500 hp etc. Jul 27, 2006 · I'm curious as if a 500 cfm Edelbrock would be too small? I'm going off the old formula of max engine size (355) times max rpm (4,000) divided by 3456. Includes a rich graphical interface to visulize the output. 2=1,100CFM. Assume a cam spec'd to suit. Good Way To Estimate: Take engine RPM x engine displacement, then divide by two. 8) ≈ 203. A 1,000 cfm throttle body will work fine on an engine making 200 hp. Jun 30, 2016 · Then 1,659,625 ÷ 3456 = 480 CFM Even with about a 10% cushion, a 500 CFM carburetor will handle this engine great. fan cfm for hp rating? - Mustangsandmore Forums The calculator uses the building square footage, building usage type and building shape to automatically determine the maximum and minimum overall tonnage and electrical usage of the equipment for multiple HVAC systems. Also I am thinking a puller The CFM (Cubic Feet per Minute) Calculator is a valuable tool for determining the appropriate carburetor size for your engine. Fan CFM Calculator What is CFM? What CFM do I need? How many cfm per square foot? How to calculate cfm for different areas? How much CFM for a room? CFM Formula How to calculate the CFM for a room? How to calculate cfm of a fan? This fan CFM calculator will help you pick a great fan for your space or application. Right now it will run all day at 170. Wondering what size carb I should go with. Oh, and that cam is much too lazy to make big power. This will Nov 18, 2006 · Oldsmobile 468ci Making 500 hp with a big-cubic-inch engine is relatively easy because of the engine's size. If you have a mildly modified high-performance engine, Holley’s 500 cfm HP 2-barrel is a component that will save fuel and retain performance. I want to upgrade to 52 or 58mm. Official Release: Holley carbs have powered more racers than all others *HP estimates are based on gasoline. So now I have a base guideline to build off of. 7:1 compression Heads flow 300-310cfm from . CFM = Velocity (feet per minute) x Area (square feet) How much CFM do you need? Total Cubic Feet (volume of Consider the following minimum cubic feet per minute (CFM) ratings for basic engines: 1,250 CFM for a 4-cylinder 2,000 CFM for a 6-cylinder 2,500 CFM for a 8-cylinder A further note is that engines that are 5. The function of the carburetor is to ensure the right mixture of fuel and air before it enters the engine. May 18, 2023 · Think of it this way: HP determines how powerful the air compressor’s motor is (to refill the tank). Aug 18, 2023 · The math helps explain why 300 cfm not 500 hp automatically. At 6500 RPM which is a bit more realistic, it uses 592 CFM. Apr 10, 2019 · If an IR intake running essentially unthrottled, 500 CFM is different than a 500 CFM 4-bbl pulling 1. Flow rate is the amount of fuel a pump can supply over time. and swapping out the 3. May 20, 2007 · So for an example if your engine produces 500 HP at the crankshaft, then that's 500x2. Ive seen some similar builds use a Quick Fuel 950 also. Once you’ve done that, then selecting a good air compressor becomes a Mar 26, 2011 · I don't see how you will even be close with option 2 , the two hundred pounds is not worth it when you can make 500 tq and 500 hp with option 1. So that's 1,100 CFM cut in half. Also gives exhaust flow speed Dec 1, 2004 · My point is that if you are only looking for 500 HP and 500 lb/ft of TQ out of a 454 there is absolutely no reason to get fancy -- factory oval ports will easily do the trick. Most commonly, we need to calculate CFM for a room for fans, air purifiers, air conditioners, and so on. 0-liter (302 cubic inches) or larger should use an electric fan with 2,800 or more CFM. ca » Sat Dec 11, 2010 8:59 pm I'm assuming that 280 CFM is through the intake @ 28". 19/1. Jul 7, 2020 · What carb will be suited for a 475 to 500 horse 406 SBC? I have a 3310 I can use, but not sure if it would need more. I want to use an Edelbrock 2701 intake with a Edelbrock 1403 500 cfm carb. 5 inches or your 500 CFM 2-bbl @ 3 inches or his 540 hp @ 8 inches. Pick up an aluminum 2 core 1" tubes with dual fans for under $500. However, a Small Throttle Body will limit the max horsepower rating. 6944 Use the form above to input the values, and the calculator will provide the required CFM or BTU's. There are hundreds of online videos, build articles, and real world racing experiences detailing exactly what you can get out of a 302/5. Apr 28, 2010 · All mandrel bent pipes. Individual systems will vary based on fuel system design, regulator type, fuel cell location, launch G’s etc. CFM or Cubic Feet per Minute is a unit for airflow we use in HVAC calculation. This will give you fuel usage in lbs. RB Racing's Turbo Boost and Airflow CalculatorHorsepower is related to airflow and airflow is limited by the pumping capacity of a given engine displacement . With another point of static c/r the number is closer to 400 HP. Aug 1, 2004 · SpecsDisplacement: 500ci, bore x stroke-4. This tool will help calculate the size carb you need in CFM for stock or racing engines. Oct 25, 2023 · The Carburetor Sizing Calculator is a powerful tool used by automotive enthusiasts, mechanics, and engineers to optimize engine performance. Jan 29, 2016 · We show you how to choose the correct carburetor for five different engine horsepower combinations. 2 = 1650 CFM needed. They often tell us that they have a 2,500 cfm fan now and their vehicle overheats in low speeds or when they are stuck in traffic. Heres what I am working with: 11. Converting CFM to HP is crucial in fields like mechanical engineering and HVAC system design to ensure adequate power is provided for handling specific airflow How to Calculate CFM and HP To calculate the required CFM or BTU's, you need to know the temperature difference (ΔT). Oct 3, 2024 · CFM, or Cubic Feet per Minute, is a measure of airflow, often used in applications like air conditioning, heating, and ventilation. For the biggest 250 pills in use I find 750HP x 2. With the average CFM per square foot and this CFM chart, you can now quite easily determine how much CFM you need for your home. Knowing the relationship between CFM and HP is crucial for understanding how much power an Aug 14, 2018 · Quick Exhaust System Math Easy Way To Estimate: Your intake system needs to flow 1. Use this same volume of air for the exhaust system, but then correct for thermal expansion (you need to Jul 22, 2005 · -Superflow says somehing lke 2. Pretty much every forum and dyno points to a 1000-1050 cfm carb to reach this number yet the calculators all say it only take around 550 cfm to make 750 hp. Apr 22, 2024 · How about 632 cubes from a big block Chevy casting that makes 815 HP! You can take our 500 HP 496ci stroker build above and tweak the components, as we did for our 600 HP 454 build found in our Week to Wicked Nova Gasser (648 HP to be exact), or simply add some nitrous to gain that extra 100-200 horsepower you’re looking for. HP, or Horsepower, is a unit of power commonly used to describe the capacity of engines and motors. Hard-line your system as much as possible in the interest of safety. May 26, 2011 · It's an 800 CFM carburetor - look at it more as a question of what 800 CFM will support. The stroker got 450~500 hp, so I'm going to guess and say at least a 4000 CFM? Jun 3, 2025 · How many CFM do I need? Answer #1: 350 – 400 CFM per ton of HVAC capacity. 106 LSA,102 LCA. 402. CFM Consumption Chart. No changes , easy choice up to about 350 hp Alternatively, I'd go 600 Edelbrock, do not go 500 Edelbrock, they have some odd casting that really hurt airflow. This fan air flow rate can be measured using a device or estimated by relating the fan's electric power consumption and the pressure it creates. We have a Super Stock customer running mid-9's with a small block Chevy using a smaller "750" cfm unit, built from an early 1970's Chevy divorced choke Feb 20, 2019 · How much cfm does my carb need to be for 440 cube SBF @ 7800 rpms. How many CFM do I need for 1,500 sq ft? 1,000 CFM. So a 300 hp 327 needs 501 cfm and it should hit peak volumetric efficiency at 5284 rpm Here's the Hp/Tq for a 1961 327 Corvette [with a Carter WCFB of approx 525 cfm, but some claim only approx 400 cfm] Kerrynzl, Mar 26, 2023 SHARE POST #14. Sep 10, 2025 · Enter the total amount of air flow in cubic feet per minute (CFM) into the calculator to estimate the horsepower of the motor. In terms of power, this isn't even 1. If I get tied up in traffic it may go to 210. At 5k it comes out to 513. For example: A naturally aspirated 500 Our air compressor CFM calculator takes into account the volume of the tank, desired pressure, fill-up time, and operational factors to estimate the CFM of the compressor. 2hp per cfm on an 8 cylinder engine so if you had 300 CFM you have 660hp's worth of air, and cut the numbers in half for a 4 cylinder. 44 is derived from various factors, including air density and efficiency, and is used as a standard value for such conversions. How many CFM do I need for 1,000 sq ft? 667 CFM. 72) and it dynoed at 490 HP and over 525+ ft/lbs torque. CFM is a critical metric that indicates the amount of air the compressor can deliver per minute, representing its capacity to power air tools and equipment effectively. Oct 1, 2025 · Enter the horsepower and this exhaust pipe size calculator will give you the recommended exhaust size in mm & inches. Mar 4, 2024 · We start with a nice basic Chevy 350 build parts list and move through such options as 400 hp 350 Chevy recipe, 500 hp 350 Chevy recipe, and even a 350 SBC turbo build. Nov 28, 2008 · A 350 at 7000 RPM and 90% VE uses 638 CFM. Fuel Pump Specs Defined Fuel Pumps are sized by flow rate. May 3, 2007 · According to Duttweiler, all it takes to make 500 hp is cylinder heads that flow 310 cfm or better along with a little more camshaft than stock. You can use an air compressor HP to CFM conversion chart to determine the CFM you need. 88 valves (mine has the 2. I do not use it when in wet conditions, but I'm afraid I'll burn it up during leaf season. A higher CFM means more air being moved, which is important for tasks that need strong airflow. The HVAC systems analyzed in this calculator include (1) split systems/packaged A/C, (2) air cooled chilled water systems and (3) water cooled chilled water systems. By admin More from this author When 2,500 cfm isn't equal to 2,500 cfm We've had quite a few people question our advice when we recommend a 2,500, 2,800 or even 3,000 cfm electric fan for their hot rod or 4x4. Jan 21, 2013 · I want to go from a mech. I currently have a Hooker Aero Chamber muffler on Tips on compressor sizing for optimal performance: Understand airflow (CFM), pressure (PSI), and power (HP/kW) to choose the right air compressor size. I'm resurrecting my '72 restomod, gonna finally drop in my ZZ383-500, and a SST TKO-600. but when you stand on it, hold on! Review this air tool CFM chart to find out what CFM rating your air compressor needs to run each air tool at 100% duty cycle! Flow rate calculator contain system specific calculator, general calculator to calculate the products required for your air piping systems. 300x4. Then just know that you need a VERY GOOD fuel system to deliver high volume at low pressure because the Q-Jet has 1 needle & seat and a small fuel bowl. Dec 15, 2003 · Reviewing the 600-cfm and 650-cfm horsepower curves at 500-rpm increments will again show an increase of approximately 2-3 hp down low and 5-8 hp higher in the rpm curve. Trying to find the right size carburetor for your engine. Air Tool Consumption Chart So, what size air compressor do you need? One with high enough PSI and CFM ratings. How much CFM should a fan for such a room have if we’re looking to completely change all air 2 times per hour (every Apr 2, 2023 · Most street car applications need about 2,000 cfm for a 400-500 hp engine with air conditioning and trucks pulling trailers need 3,000 to 4,000 cfm depending on the engine and road conditions. See how much vacuum your pulling at full throttle at load, 4bbl carbs are rated at 1. Fill in the fields below (example: 5000 RPM), click calculate, and we’ll show you the optimal cfm for the street and track! The ratings are different because street engines have a volumetric efficiency around 85% while racing engines are closer to 110%. 500 lift hydraulic cam, a cast truck intake, and a 2 barrel. However, not enough could lead to overheating. Our easy to use cfm to hp calculator is designed to convert cubic feet per minute to horsepower (HP) for those dealing with air compressors, ventilation systems, and fluid dynamics. 1 day ago · For a more accurate calculation try Larry Meaux's Pipe Max. 1 hp per cubic inch. His program is excellent and will provide a lot of info. /hr. 5" will support up to ___HP. Any suggestions? CFM Calculator Dial in cfm for optimized performance! Fill in the fields below (example: 5000 RPM), click calculate, and we’ll show you the optimal cfm for the street and track! The ratings are different because street engines have a volumetric efficiency around 85% while racing engines are closer to 110%. Oct 28, 2010 · i was thinking of putting my 500 cfm on an aussispeed 2b intake with a turbo but im shooting for 500 hp so i think ill gut the fuel injection manifold and just put bigger injectors, how much cfm can a xf fuel injection manifold support anyway, can i run a different computer with the xf? kW = (500 × 100 × 0. Generally, handheld leaf blowers have an MPH rating of around 100 MPH, which is a great combination for this CFM range. Leaf blowers under 500 CFM are usually handheld making them perfect for small patios, lawns, and backyards. 44 This formula allows you to estimate the horsepower required to move a given volume of air (CFM). Understand the relationship between power and air flow in air compressors. Opt for braided stainless steel flexible hose. CFM is something that is used to measure the performance capabilities of a leaf blower along with MPH. You’d be better off with a carb smaller than needed rather than something oversized that can lead to poor drivablility and performance. This is a measure of how much air they can move. Every air tool has a recommended CFM requirement that’s set by the manufacturer. 2 CFM per engine horsepower. They have tiny Aug 24, 2021 · Typical through the industry is 28". The 52mm has the attraction of not needed to pull manifold, redo all gaskets and fron of motor, and just a 20 min bolt on affair. 2 = CFM needed to support the HP. I know muffler type, length, etc. Looking for a free and easy CFM calculator to determine how much compressed air your compressor is producing? Our online CFM calculator can help you properly size your air compressor and make sure you’ve got enough airflow to meet your compressed air demand. CFM (cubic feet per minute) measures the volume of air that an air compressor can deliver. Aug 30, 2022 · Typically, fans are specified in CFM (cubic feet per minute) to indicate the volume of air in cubic feet a fan can move in one minute.
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