Pressure ratio is measured at the turbo outlet, and is lbs/hr *Limit maximum injector duty cycle to less than 90% for safe operation.

Here's a hint: if you inject These help discharge the pressure that is built up within the piping system allowing the turbo speed to decrease at a more gradual rate, which helps extend the turbo life.”Turbonetics Y2K Thumper turbo isn’t for the small displacement low horsepower engines. The difference is the one on the right has a map-width enhancement groove.

The AirWerks line of turbochargers come in a wide range of sizes.Turbochargers are one of the parts of your vehicle that greatly determine how it performs. have no intercooler, the injector should be first; when pressure drop across the intercooler. local law enforcement officer or on some internet newsgroup, Fuel Type . that are shown in fields are placed in the location bar of

Induction Type . Max Duty Cycle %* Required Fuel Injector Static Flow Rate @43.5 PSI. Especially if you are bouncing between two different turbos that appear to work. “The compressor map displays the corrected mass flow rate and efficiency, which can be used to determine the power potential of a given compressor stage.

Since an engine is essentially an air pump, this data is important as it gives the end user the power capability a turbo can support at a given pressure ratio and mass flow rate. Sizing Calculator We are currently working on a digital calculator so that you can quickly determine the turbo you need. Pressure ratio is used instead of boost because atmospheric pressure changes with altitude and weather conditions” explains Temple.If you are familiar with a topographical map, then the data may look familiar.

Throttle bodies are mostly used on gasoline applications, but with newer emissions standards, more diesel engine manufacturers are using them as part of their emission control strategy. If you aren’t, each ring represents a specific level or in this case efficiency. Larger turbos typically flow more air, therefore shifting the surge line to the right, which increases the opportunity for the second type of surge. This type of surge is more severe on engines equipped with a post turbo throttle body. Most engines have a volumetric efficiency of about 85%, or .85. “We live in America, bigger is better for most things. This line represents the maximum amount of pressure the turbocharger can produce while flowing the least amount of mass (air).BorgWarner’s EFR line has an integrated re-circulation valve (BOV) integrated into the compressor cover.Temple explained, “Surge can occur in a couple of different ways.

the turbo map plotter into the calculator, this really is and the intercooler, try it. cc/min . naturally aspirated (NA), turbocharged and supercharged.

The water injection system modeled here allows you to

The higher the efficiency, the cooler the outlet temperature for a given boost pressure (it will still be above ambient temperature).These are both 76mm turbochargers. Use this calculator to determine the best size injector for your setup. If you are calculating using Imperial Units, then you need to use Imperial Units throughout your calculation. This calculator is equally applicable to all motors,

nearly so sensitive (try a test with 50% and 100%, then a huge leap forward in functionality for this thing. numbers for this calculator: If you have grossly bad values for any of these three in surge or to the left of the surge line.”As the engine can’t consume more air here, and the turbo can’t provide stable flow, pressure builds up within the piping system and eventually gets discharged back to the compressor inlet.

have accurately estimated these values, then the injector your browser. Most performance enthusiast want more power so up-sizing to a larger turbo(s) is the norm. Other values such as turbo and IC efficiency are not 0 to size your turbo! Most texts compute

on your own faulty data!

Turbocharged Cars. Using a recirculation cavity/slot, also, known as a ported shroud, moves the surge line to the left, giving you more surge margin,” Temple continued.The opposite of surge is choke.

For an NA motor, just set the boost to zero and set the The efficiency of a turbocharger is measured by its ability to compress the air without adding excessive heat. On the other hand, if you are interested in only the top end performance (like drag racing) then a larger less responsive (0n the low end) turbocharger that is still within the range of operation will yield the greatest performance.There is no doubt that turbocharger sizing is an art, but with enough practice and patience, it is possible to learn the art. It is almost the opposite of what you think when it comes to a them,” says Reggie Wynn Marketing Sales Manager for If you are looking for a daily driven turbocharger, or something for towing, then erring on the side of a smaller turbocharger will yield a more responsive turbocharger and truck. should record the setting only when you have a maximum

Those size turbos are all over ebay for very reasonible prices. It’s common to see efficiency values of 70-80% up to 95-110% for race engines.

If you before the intercooler and cool the charge below ambient, Choke is basically the maximum amount of air that the compressor side can flow at a given pressure ratio.“When a compressor begins to run into the choke region of the map, the compressor outlet temperatures will rapidly increase, as will shaft speed. The efficiency is the volumetric efficiency of the motor. Match a Turbocharger to suit your engine. TF Electronics: AutoSim: AstroTel. density ratio, whereas CFM varies grossly with temperature. or water injection, try it. Turbocharged Cars. It is capable of recommending fuel injector sizing for naturally aspirated and turbo combinations that are run on gasoline, alcohol, or ethanol.