How to calculate compound turbo. My question is.

How to calculate compound turbo. Quickly estimate turbocharger airflow needs with our Turbo Sizing Calculator. Doing the math, the overall pressure ratio is 3. Apr 12, 2021 · Look into how to calculate the wheel trim to better understand this element when purchasing the product. We explain what staged turbos are & review their key benefits. At sea level that gives a overall P/R of 4. In this video we go over the basics of turbo diesel compound turbo charging using science, math, paired with real world examples. Let me know if you like this s May 24, 2021 · That atmospheric turbo intakes from atmosphere, feeding the cold side to the compressor inlet of the manifold turbo, which will add additional compression to the new, higher-pressure atmospheric condition being created by the atmospheric turbocharger. Mar 25, 2013 · I disagree. Compound Interest formula: Formula to calculate compound interest annually is given by: Amount= P(1 + R/100)t Compound Interest = Amount - P Where, P is Use our boost horsepower calculator to determine how much power can a supercharger add to your naturally aspirated engine. In this video we go over the different turbo systems and their configurations used in the internal combustion world! We also cover the advantages and disadvantages of each system and why some Kevin's Compound Sequential Twin Turbo Design I've been thinking of doing a sequential turbo setup for a while now as a means of getting more boost at lower rpm, so that I can run a lower stall in my TH400 converter. Which compound do you want to do? Small turbo and big turbo in parallel, ends up making the boost the big turbo would and not using the small one, and having the lag of the small turbo, aka none. Squirrel performance and Not2Fast have decent calculators, but they are lacking and a little off on their some formulas. However, this technology is far more versatile and practical than it may seem. If the air requirement is not known, a rough estimate can be made using the following equation: Apr 11, 2013 · Hi, everyone, I've been doing research on builds for two different turbo systems and I've scoured the internet to find out how to correctly size turbos. When a compound sequential turbo setup is designed and built properly, you will see boost just off idle and holding strong to redline. 7 Secondary P/R of 1. May 17, 2009 · Hello all, I just pickup up my hellion TTsc cobra and started looking around for the correct formula to calculate compound boost and found a chart online. Sep 18, 2023 · The valley turbo boost that it sees is the difference between the incoming pressure and outgoing pressure. Jan 28, 2013 · A primary turbo in a compound setup will not make as much power as it would in a single turbo setup, maybe around 3/4 the power. If the diameter is instead increased above the calculated value, the cooling flow expands to fill the larger diameter, which slows the Calculate optimal turbocharger size for your engine based on horsepower goals, displacement, and boost targets. I hope this will be useful to you. I understand that one of the most important factors in a turbo system is how much it will flow at what pressure ratio. Jan 24, 2015 · I've been a little confused about compound boost numbers and contribution by each turboI think I'm starting to understand it more but wanted to check with you guys too. The purpose for compound turbos is to combine the characteristics of the secondary turbo with that of the primary turbo. Im hoping for 350-400hp if possible. The secondary turbo pressure ratio is 1. We would like to show you a description here but the site won’t allow us. Turbo boost pressure calculator Calculate the required turbo boost pressure for your engine by providing the engine's naturally aspirated power and your target horse power. Why do Compound or Twin Turbos work so well at doing things like cooling EGTs? In this video, we g A compound sequential turbo setup combines a quick spooling small turbo with a high power larger turbo. Aug 24, 2021 · In this video I explain how to choose the correct turbo size for your car! All the formulas and calculations are in the video. Have your calculator handy!! May 13, 2015 · Write a C program to input principle (amount), time and rate (P, T, R) and find Compound Interest. They are not a replacement for professional advice Jul 25, 2024 · Proper turbo matching is crucial to avoid issues like turbo lag or over-speeding the turbo, which can potentially lead to engine damage. The primary objective in matching a turbocharger to an engine is the selection of a compressor that covers the engine air requirement at the highest possible compressor efficiency. Also both turbos are exactly the same size Where: Base HP is the engine’s horsepower without boost Boost Pressure is measured in psi (pounds per square inch) 14. pressure ratio. Today we’re talking all about upgrading turbochargers, and why he thinks compound turbo systems are the best bet for many. And the corrected secondary turbo boost is 8. I'm seeing a max of 60 psi compounded, and only about 18 psi on my low pressure S475. We utilize the distinct characteristics of each turbo to optimize our engine’s performance: the larger turbo – designed to provide more Aug 16, 2016 · Compound turbo basics: 11 reasons why putting two turbochargers on your diesel engine is the best thing you can do. This online calculator should be used as a tool only. In these systems, there is a primary (small) high-pressure turbo and a secondary (big) atmospheric turbo. Apr 15, 2016 · I've seen other compound turbo build threads but can't really seem to find MUCH advice on what turbo to use with the 17/22. Essential Inputs for Turbo Sizing Using a turbo size calculator requires knowledge of engine capacity and Mar 10, 2018 · Compound turbo setups have been used in gassers overseas in like 4 bangers and 6 cylinders. Turbo Match Calculator. calculate the mass air flow for each case. If you look at other manufacturers you may need to convert from other units of measurement. This guide simplifies the process and explains what data you need to perform accurate calculations with a turbo sizing calculator. It outputs the pressure ratio, lbs/min and CFM numbers which can then be plotted onto turbo compressor maps. With over 35 different turbochargers to choose from, how do you know what’s best for your engine setup? This write up will cover the principles and […] **The turbo size calculator and the other calculators on StrikeEngine. Enter displacement, efficiency, maximum engine speed, maximum boost pressure, intercooler efficiency, intercooler pressure drop, and intercooling medium temperature. A couple of turbos Ive seen that I THINK may be an alright match is an hy35, or a t3/t04e 50tr with ball bearings. All the information to Dec 28, 2013 · This calculator works for compounds, parallel twins, or staged twins. Perferably in a GT series housing. The primary turbo pressure ratio it 1. Disclaimer: BD Diesel takes no responsibility in the accuracy of the above information. Get compressor and turbine size recommendations. Shown below is a figure that identifies aspects of a typical compressor map: Learn how to calculate turbo size. Total Drive Mar 26, 2025 · Learn about the compound interest formula and how to use it to calculate the compound interest on your savings, investment or loan Use our online compound interest calculator to correctly calculate the effect compounding interest can have on your savings. Jun 26, 2018 · How do you know what size turbo you need? You check out this article, where we run through all of the math to teach you what you need to know. Always keep this in mind when purchasing any turbocharger-related products. 88. 6 to 0. With all of my research it's still not surprising that no one is really divulging any info. thanks v. The primary turbo receives the exhaust flow first and given its lightweight and smaller GeeksforGeeks | A computer science portal for geeks Aug 22, 2025 · Use our compound interest calculator to see how your savings or investments might grow over time using the power of compound interest Nov 19, 2024 · Learn how compound turbocharging works, boosting efficiency with dual turbos in series, ideal for diesel engines and distinct from twin turbo setups. One feeds the other to create double the boost. Why are these engines not more widely used? Nov 28, 2023 · Choosing a turbo with Boost Advisor begins with entering your target crank horsepower and your engine displacement. I'll calculate the output temperature after the second stage with and without intercooling a bit later. Whether you're looking to boost your daily driver or enhance a track beast, understanding turbocharger sizing can be the difference between a thrilling ride and a frustrating Dec 12, 2015 · I have been seriously considering building a triple turbo setup for my cummins 12 valve. May 30, 2013 · I've been doing a little research on compound turbo setups and is has made me wonder how do you calculate the flow of a twin setup. Compound turbo systems, at their core, involve pairing two turbochargers of different sizes to work in sequence. But all I can find is that you pick your secondary to fit your RPM range where you want the boost to start. 0 which is 15 psi on each turbo for a total of 45 psi boost. Sequential vs. Nov 6, 2018 · With a HX35/369 compound system, I have 30 psi overall boost and 13 psi at the inter stage pipe. In this article, we'll talk about how to calculate simple and compound interest values and then use the C++ programming language to put this logic into practice. Now to find a small turbo. In this article, we will provide a step-by-step guide on how to size a turbo calculator. I need some data to validate my calculations. Sep 22, 2010 · How To Size A Turbocharger For A Compound Setup? - Engine and Transmission - BigMackTrucks. I have my own data for single turbo operation, but was wondering if any of you had some data from a coumpound setup? I need: Total Boost. It is a combination of an exhaust-driven turbocharger and a mechanically driven supercharger, each mitigating the weaknesses of the other. BD Engine Brake does not imply any warranty based on this calculator. 7 represents atmospheric pressure at sea level (in psi) Efficiency Factor accounts for system losses (typically 0. Nov 8, 2013 · This sequential setup is basically a compound turbo setup on the exhaust side (but with identical size turbos) and a sequential setup on the intake side. This definition of compound turbocharging may sound complicated, but it is very straight forward. The primary calculations included are: Boost curve for specifying a map of boost pressure over engine speed Compressor Map calculator for selecting a compressor size for best efficiency Effective Compression including boost and Nov 25, 2024 · When people think of compound turbocharging, images of race trucks belching black smoke on the drag strip often come to mind. Learn about compound turbo setups with a helpful diagram. The formula is based on common turbo sizing principles. 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 . Nov 17, 2011 · The only way to really c the pressure difference between the turbos is to have boost gauge before and after the small turbo and if the pressure after the small turbo is greater them before it then I would say that mean that its taking the air from the big turbo which is feeding it ad x amount of boost and compressing it even more but if the Jul 28, 2007 · There are many variables and they all compound (pun intended) which makes the math exponentially more complex than 2x a single turbo match. Speed-Wiz turbocharger calculationsTurbocharger calculations Turbocharger Calculations Speed-Wiz offers several special calculations for turbocharged engines. Feb 1, 2013 · This includes reliance on the stock turbo (along with specialized programming), upgrading the factory turbo, or investing in a multiple turbo system. Compound turbos can be a bit more difficult to size than single turbos, and can be geared towards response, all-around performance, or peak power. Nov 30, 2023 · How Do Compound Turbo Systems Work? In a compound turbo system, you’ll find two distinct turbochargers at work: the low-pressure turbocharger, the larger of the two, and the high-pressure turbocharger, the smaller one. Compound turbocharging utilizes two turbochargers of different sizes working in tandem to generate more boost acros Turbo Tech 103 (Expert) This article is a bit more involved and will describe parts of the compressor map, how to estimate pressure ratio and mass flow rate for your engine, and how to plot the points on the maps to help choose the right turbocharger. See what turbocharger you need to get the power you want. Horsepower and engine displacement are the two main inputs needed for selecting a turbo and will allow you to get a rough idea of what turbo is right for your build, while the quick sort Jan 17, 2008 · Compound Turbo Sizing Math hi there being a newbie this might be a little too much to ask , but does any one know how you would go about the math for plotting and over laying compressor maps for sizing series turbos aka compounds , please dont shoot me down , its not for any fixed Aug 5, 2024 · Can calculating the Boost Pressure Ratio (BPR) help in tuning an engine? Yes, calculating the BPR is crucial for tuning an engine, especially one that relies on forced induction. Cheers Turbo Sizing Calculator Feb 18, 2010 · Re: Compound tubo charging you have one gate before the smaller turbo which dumps into the inlet of the larger turbo, then there is a gate at the inlet of the large turbo which dumps to atmosphere. Find the right turbo size for your engine with our turbo size calculator. Calculate the optimal turbocharger for your engine in Sourcetable with ease. It’s a key factor in maximizing performance while maintaining engine health. Easy, fast, and accurate CFM results in one click. 31K subscribers Subscribed Sep 17, 2024 · Enter your engine displacement, maximum RPM, and target boost into the calculator to determine the optimal turbocharger size for your engine. Parallel vs. Then, making estimates of the intercooler outlet temperature (or turbo outlet temperature if nonintercooled), turbo discharge pressure, volumetric efficiency, manifold pressure, etc. This article will describe parts of the compressor map, how to estimate pressure ratio and mass flow rate for your engine, and how to plot the points on the maps to help choose the right turbocharger. Apr 1, 2003 · Check out the different turbo charging setups you can run on your ride and the different strategies you can use to find the most power. Oct 17, 2010 · My original thinking was to better a compound turbo by adding a 3rd smaller turbo in series to get the high boost levels, but thought that by the time the exhaust goes through 3 turbine wheels there wouldnt be enough exhaust heat energy to properly spool a 600HP turbo. Mar 4, 2021 · A sit down with Jacob Allenbaugh, founder and lead designer at Pusher Intakes. Turbochargers can be complex and hard to understand. Oct 17, 2022 · How The Compound System Works But what is a compound turbo and who needs one? A compound turbo system is created by combining two turbochargers in line. 8) A 200 HP engine with 10 psi boost and 0. In this Diesel Insights video, Nick walks you through how to size you compound turbos. The calculator uses these inputs to compute the estimated turbo size and performance output. Calculate air flow, smaller turbo size, and larger turbo size. . We recommend Garrett Turbochargers. Engine, fuel economy, turbo, intercooler, pipe size compare and tons more. Get instant airflow, mass flow, and turbo recommendations. 7 ≈ 95 HP Total HP = 200 + 95 = 295 HP How to The compressor map is a graph that describes a particular compressor’s performance characteristics, including eficiency, mass flow range, boost pressure capability, and turbo speed. Oct 1, 2025 · This calculator needs your engine capacity & your desired boost pressure in PSI at your desired RPM. I plan on using external wategates on both primary and secondary turbo. Here, the formula is likewise not difficult. Turbo Wizard Use this calculator to determine the turbocharger requirements that best fits your setup. 7 efficiency factor HP Increase = 200 × (10 / 14. One assumes you will be looking at Garrett Compressor maps in lb/min. This means you get all the advantages of a compound turbo setup for spooling the turbos, but with none of the disadvantages of the compound setup such as the boost being too high for a gas engine. Check it out here at Turbo & High-Tech Magazine. Then it's off to the compressor maps to check airflow v. To increase total work done by the motor through minimizing Time to Torque (Turbo Lag). :banghead: So I am really only trying to understand why places like Wide open performance split the exhaust for. May 29, 2020 · Calculating pressure ratios for compound turbo systems can be achieved with the formulas below. Fill out the blue marked fields to start!Calculated Outputs - Click to Expand/Collapse Jan 18, 2022 · We get a lot of questions about how compound turbos work. Yes, it is easier on the rotor group (thrust bearing) by using two compressors to achieve higher pressure ratios. Oct 31, 2008 · My turbo is a "perfect" large turbo for a 50 psi Compound Setup. Compressor wheel size, turbine wheel size, and turbo housing size are all critical factors in determining the overall performance characteristics of a twin turbo setup. Apr 23, 2023 · In part one of this how to series we explained how to identify target horsepower, why turbos are rated for crank horsepower, and how to calculate wheel horsepower to crank horsepower depending on drivetrain. Interstage Boost. 42M subscribers Subscribe Turbocharger Calculator Wallace Racing BACK to Calculators This Calculator will figure the parameters for turbos using your inputs. So if your large turbo is pushing 30 psi into it and the valley turbo bumps that up to 60 psi then the valley turbo is only doing 30 not 60 psi If you have the table set to where it should be then it will prevent the codes and limp Correct. com All Activity Home Specific Topic Forums for Antique & Modern Trucks Engine and Transmission Oct 17, 2022 · The power law is used to calculate compound interest by taking into account the principal amount, the rate of interest, and the period. NOT FINISHED YET !!! Turbo Size Calculator To use the Turbo Size Calculator, input your engine displacement (in liters) and the desired boost pressure (in psi). 7) × 0. Understand how compound turbos work and how they can improve engine performance. d. Available to calculate, daily, weekly, monthly, bi-annually and annually, unleash the power of compounding to turbo-charge your savings over time! Easily size your turbocharger with our intuitive Turbocharger Sizing Calculator. Nov 11, 2024 · When it comes to maximizing engine performance, turbocharger sizing plays a crucial role. Compound - Twin Turbo systems explained - Boost School #11 driving 4 answers 1. 6. Twincharging does not refer to a twin-turbo arrangement, but to a setup where two different types of compressors are used (instead of only turbochargers or This calculator will help you choose the right Turbo Charger in conjunction with a Compressor Map. Or Small turbo feeds into the inlet of the big turbo and you make super high boost numbers and retarded power will small lag. Find out the benefits of a compound turbo setup and see a visual representation of the components involved. A twincharger refers to a compound forced induction system used on some internal combustion engines. By choosing an inappropriate size for the larger (low pressure) or smaller (high pressure) compressor, either one could be a restriction. You'll learn about which turbo is more important in regards to upgrading. :beer: :beer Sep 14, 2022 · When compound turbo systems are described as yet another ‘twin-turbo’, a lot of insight is lost. Can anyone chime in and let me know if this chart is correct or if there are any online calculators out there. Compound interest may be contrasted with simple interest, where interest is not added to the principal, so there is no compounding. The way I understand things is that the drive pressures (which will cause high EGTs) are a HUGE concern when running compounds, and this due to the fact that you are running through 2 different turbine housings. Also discussed How To Choose & Correctly Size a Turbo Garrett Advancing Motion continues to engineer the most diverse range of engine boosting products and accessories for racing and performance enthusiasts. I was initially concerned that my Oct 12, 2024 · Turbo Size Calculator To use the Turbo Size Calculator, input your engine displacement (in liters) and the desired boost pressure (in psi). 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. Optimize your supercharger setup with our pulley ratio calculator - instantly estimate boost levels, RPM limits, and performance gains for your build! Jun 13, 2014 · If you compound the compressors, you can only make about 90% of the power of the big turbo due to running a max PR around 2. Compound Interest Calculator ATI Dosage Calculation Canine Calculations Crossword Turbocharger Size Calculation Formula The following formula is used to calculate the optimal turbocharger size for your engine. A lower stall will allow me to have a converter that holds more power and has less converter slippage, which results in more power to the rear wheels. It is our hope that this information we shared provided you with a better understanding of turbo wheel trim. Click "Calculate" to see your results. Make sure to input accurate values for precise calculations. 4, Primary P/R of 2. Sep 13, 2015 · Howdy guys, I'm working on some calculations to understand the turbo's better. Mar 29, 2011 · What is compound turbocharging and why would I do it? Compound turbocharging is where instead of a single turbocharger, two turbos are placed in series with one feeding into the other. com should be used as a guide only. May 18, 2012 · In a compound turbocharger system, two turbos work in series, one after the other, to compress the incoming air, in contrast to a twin-turbo system where two turbos in parallel share the work. This is important for understanding compressor efficiency and potential power for your selected turbochargers. It does not account for real-world complexities of forced induction systems such as intake temperature, other engine modifications, mechanical Second, calculate the volumetric flow for each one of those cases. Selecting a flow diameter less than the calculated value results in the flow pressure dropping due to the restricted flow area. Apr 1, 2003 · How To Read A Compressor Map - Turbo Tech Calculating The Efficiency And Tuning Window Of A Turbo Evan GriffeyWriterApr 01, 2003 See All 2 Photos Shane and Andre explain some of the cooling and packaging issues around large single turbo setups before explaining how the current 380 PSI capable compound system consisting of 2 large turbo which technically due to pressure ratios operate at around 30 PSI a piece are feeding one smaller turbo which enables them to push past those 2000HP limits to reach higher power outputs. Logic to calculate compound interest in C programming. Oct 19, 2009 · The topic of conversation is, as stated in the title, sizing compound turbo setups. Jul 23, 2025 · Compound interest is standard in finance and economics. The engine air requirement must be either known or estimated before a match can be made. Calculating the Correct Charge Tubing The duct diameter should be sized with the capability to flow approximately 200 – 300 ft/sec. I've also added all the compressor maps I've collected and made them available to you all. Having looked at every Dec 21, 2013 · What is the ideal compound turbo pressure ratios? Lets say I have a 483 and a 4094avnt with a total boost of 50psi, and 25psi from the 483. Apr 25, 2025 · Understanding the mechanics of compound turbochargers helps us better appreciate the advancements in performance tuning and engine efficiency. Jan 30, 2025 · That atmospheric turbo intakes from atmosphere, feeding the cold side to the compressor inlet of the manifold turbo, which will add additional compression to the new, higher-pressure atmospheric condition being created by the atmospheric turbocharger. 6 For daily driving, towing and racing, is there a perfect P/R Mar 1, 2015 · Turbo compound engines extract some exhaust energy by using it to power a turbine connected to the driveshaft. I'd like to see how it performs using two ball bearing turbos, hopefullly creating really rapid spool. On Diesels they use compound for high PR's as well as more response. You just have to take a little time to see how to use it for configurations that are uncommon. In choosing Dec 20, 2020 · Note that it’s also popular to make more power than the “formula,” but if you do it’s usually at the risk of overspeeding the turbo. Overspeed and damage can result from many variables. A turbo calculator can assist you in determining the most suitable turbo size for your vehicle. This guide provides code examples and explanations to help you understand. This is important because every engine supports a horsepower range (compressor stage) and engine displacement (turbine stage). You can Feb 12, 2024 · Correcting previously stated ways to calculate and tune compound turbo setups Savage Fabrication 1. My question is The compressor map calculation can be used to fine-tune the turbocharger sizing recommendation. The increased mass flow rate through the motor Understanding Turbo Sizing Calculators To size a turbo effectively, specific information about the engine's capacity and the desired power output is critical. Understanding the ratio helps in optimizing the air-fuel mixture, ensuring the engine runs efficiently without causing damage. The formula used in this calculator is a simplified model for estimations only. I am using it on a gas motor to increase power under the curve. Discover how to calculate compound interest in C using four different methods. 82. May 23, 2025 · All the StrikeEngine automotive calculators. By choosing a small turbo that will spool easily, and a large turbo that will make enough airflow for the power goal, you attempt to achieve the best of both worlds. I’ve seen many enthusiasts struggle with selecting the right turbo for their builds, often leading to disappointing results. 8oqg lyst aqcsi rbgtv ftd95o lchox3m 8e0k ygvwt id2x sctnvdd