May 17, 08 #4 sbengineering Proven Member 1 3 Jul 30, 03 Blackwood, New_Jersey Best Power 125 Be safe and not get much carbon buildup Looking for nice trap speeds Lean out to 132 in top endDiscussion in 'Terminator Archive' started by Zinc03, Nov 4, 03 Nov 4, 03 #1 Zinc03 New Member Established Member Messages 59 Joined Nov 12, 02 Location Merritt Island, FLOct 23, 13 · The airtofuel ratio defines the amount of air needed to burn a specific fuel The airtofuel ratio defines the amount of air needed to burn a specific fuel The conventional fuels used in the combustion process are oil (#2, 4, and 6), diesel oil, gasoline, natural gas, propane, and wood—ratios for common gases, liquid, and solid fuels noted in Table 11 and 12
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Ideal air fuel ratio at wot-The fuelair ratio is the proportion of fuel to air during combustion The optimal ratio (the stoichiometric ratio) occurs when all of the fuel and all of the oxygen in the reaction chamber balance each other out perfectly Rich burning is when there is more fuel than air in the combustion chamber while lean burning occurs when there is moreMar 18, · February 19, 18 1600 A naturally aspirated engine, running on pump gasoline will normally make the most horsepower at an AFR of about 128 – 130 An AFR of about 146 will produce the best fuel economy Dynojet normally creates tunes with AFR's of 128 at high load/rpm areas, AFR's around 146 at low load areas, and AFR's between
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Jan 21, 04 · We mentioned the stoichiometric airfuel ratio (1471) that is the ideal ratio for lowest emissions, but this isn't the best ratio for power It used toDec 11, 07 · The optimum air/fuel ratio varies from one engine to another This ratio is often stated in terms of its stoichiometric value, the ideal ratio of air and fuel required to provide the complete burn For unleaded fuels, the stoichiometric ratio is 1471;The standard airfuel ratio should be near 15 parts of air to 1 part of fuel The most efficient ratio is stated as 147 to 1 For every pound of fuel used, 147 pounds of air is needed See the graphic representation above In terms of volume, this is equal to burning 1 gallon of fuel in 9,000 gallons of air
Jul 14, 19 · A/f ratio is a numerical measurement for maintaining ideal ratios of air and fuel when oxygen levels are fluctuating in the atmosphere Initially it may seem overwhelming to determine your ideal a/f ratio, however once that value is determined, itApr 19, 17 · Ideal AirFuel Ratio in a Petrol Engine It is necessary to get this perfect airfuel ratio of 151 all the time This is because the air in the mixture provides the oxygen needed to burn the fuel completely If the air is too little, then it provides inadequate oxygen for combustion This results in unburnt fuel emitting the tailpipe and going wasteAn A/F ratio that contains more air and less fuel than the stoichiometric ratio is called a LEAN fuel mixture A lean mixture would be one with a ratio greater than 1471 for gasoline An A/F ratio that contains less air and more fuel than the stoichiometric ratio is called a RICH fuel mixture
We won't get into the fundamentals of knock in this article, but we will say that the air fuel ratio will have a very important relationship to the knock threshold on knocklimited fuels Knock will destroy your engine, without a doubt, so it's important to understand how the air fuel ratio can be used as a knock deterrentThe stoichiometric mixture for a gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air For gasoline fuel, the stoichiometric air–fuel mixture is about 1471 1 ie for every one gram of fuel, 147 grams of air are requiredFeb 22, 08 · Given unlimited time for combustion and perfectly mixed batch of fuel/air it takes 1468parts of air to 1 part gasoline in a reaction that produces 100% efficiency 1471 A/F is the chemically correct ratio or stoich In a high speed engine there is limited time for combustion The air and fuel are not perectly mixed
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The ideal (theoretical) airfuel ratio, for a complete combustion, is called stoichiometric airfuel ratio For a gasoline (petrol) engine, the stoichiometric airfuel ratio is around 1471 This means that, in order to burn completely 1 kg of fuel, we need 147 kg of airThe vehicle should draw Ib of air to achieve the ideal ratio (Round to the nearest whole number as needed)The values for 100octane race fuels and methanol are 1511 and 6451, respectively
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Every car from factory preset to burn the fuels with NOTAug 24, 05 · Ideal air fuel ratio Quote;Question Liquid Octane (C8H18) fuel is burned with ideal proportion of air Calculate the ideal air fuel ratio by weight What is the approximate higher heating value of fuel in kJ/kg?
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Sep 09, 04 · I have a digital wide band air/fuel ratio meter and am looking to find the proper air/fuel ratio From what I have read 1251 A/F is close to optimal for WOT Does everyone agree?Dec 14, 19 · An average 'cruising' operation needs an ideal air fuel ratio of 151 to 171 To achieve maximum power and quick speeding/overtaking, the engine needs 'rich' mixture It is about 1213 parts air by weight to 1 part of fuel ( air fuel ratio) Also, when starting a cold engine, it needs the rich mixture which the 'choke' providesIn this range also combustion of fuel can occur
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Post by 1WheelWonder » Wed Jul 06, 05 1256 pm Hopefully my plx m300 will arrive shortly so I can start tuning My question is what is the ideal air fuel ratio for cruising, boost, etc Any help will be appreciated Top virus77 Posts 1775May 26, 11 · Through determining their chemical composition, all fuels are assigned what is called a stoichiometric air to fuel ratio, with 1471 being the perfect value determined for pure gasolineFeb 21, 17 · The lambda value at the stoichiometric air fuel ratio for ANY fuel is always equal to a value of 100 The easiest way to understand this is to remember what the stoichiometric AFR actually is Again, stoichiometric means for a given fuel, you have the correct amount of air and fuel to produce a chemically complete combustion event
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Jun 17, 09 · Are you talking about the ideal air/fuel ratio?Nov 08, 03 · The ideal air/fuel ratio?Taking realtime note of the Air Fuel Ratio at idle, cruise, and wide open throttle, we virtually had all the information we needed to dial in the 650cfm Holley atop the Torino's 351C While this particular ACCEL Wide Band 02 meter is capable of much more, we didn't need a computer to make key Air Fuel observations via the digital gauge
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Oct 02, 18 · Amount of fuel plus enrichment = (651) / (341) = 191 or 91percent rich The actual ratio of the weight of air to the weight of fuel was computed over several test runs by using an MFI fuel injection jetting calculator Fuel injection jetting was adjusted until an optimum spark plug reading was achievedMar 18, 12 · 147 is the average point that all oxygen and fuel are burned,it's also the ratio that creates the greatest heat in the combustion chamber, approx5 afr points either side of 147 drop the combustion temp by several hundred degrees Your cataletic converter loves this AFRFor forced induction and aircooled engines, go 22% rich (~ AFR, or Lambda = 078) For a stoich of 151, the numbers would be (Lambda 0) and 117 (Lambda 078) These are general rulesofthumb Consult your fuel provider for
Z Fuel Ratio Sensors And All That Stuff Air Fuel Ratio Overview Air And Fuel Are Ideally Mixed At A Mass Ratio Of 14 7 1 14 7 Parts Air To 1 Part Gasoline Where Parts Are In Kgs Or Lbs This Ratio Is Called The Stoichiometric Ratio Which Roughly Translates To
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Jan 03, 19 · But that's in an ideal world, one where every molecule of fuel and oxygen is completely consumed during every single combustion event In a real engine, a 1471 airfuel ratio is a little too leanThe ideal air to fuel ratio for an engine is 1531 If a vehicle burns 6 lb of fuel, how many pounds of air should it draw to achieve the ideal ratio?Air standard diesel engine cycle In the diesel engine, air is compressed adiabatically with a compression ratio typically between 15 and This compression raises the temperature to the ignition temperature of the fuel mixture which is formed by injecting fuel once the air is
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If exactly enough air is provided to completely burn all of the fuel, the ratio is known as the stoichiometric mixture, often abbreviated to stoich" In simple terms, it is the ratio of Air to Fuel in a combusted charge Think of mixing your oil in your 5 gallon fuel container If you mix at 501 that is 50 parts fuel to 1 part oilLPG 1551 Those are the Air to Fuel ratios for the most common fuels, by mass, known as the Stoichiometric Ratio The Ratios do not tell the full picture though They are the perfect ratios for a well mixed air and fuel vapourSep 10, 18 · In an ideal world, a scientifically perfect air/fuel ratio for a gasoline engine with an electric fuel pump is 1461;
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Nov 15, 08 · So we need 399 kg of oxygen for every 1 kg of fuel Since 232 masspercent of air is actually oxygen, we need 399 * 100/232 = 172 kg air for every 1 kg of methane So the stoichiometric airfuel ratio of methane is 172 When the composition of a fuel is known, this method can be used to derive the stoichiometric airfuel ratioTechnically speaking, the higher the A/F ratio the better your fuel mileage, but most cars can only handle about 161 before overheating or engine damage as follow The optimal ratio is 24 parts of air (at least) to 1 part of the fuels like gasoline (petrol), ¬ for diesel even higher!Jan 03, 12 · The more HP per cubic inch, the leaner the ratio will be Many real high HP engines will be 14 to one, or even higher He 127 ratio is just a ball park, or starting ratio to get you close Always jet for maximum HP, not to the air to fuel ratio numbers
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Jul 10, 18 · The ratio of this mixture affects your fuel economy, performance, reliability, or even if your car runs at all The scientifically "perfect" mixture for normal petrol is 1471, that is 147 times the mass of air to fuel, but that doesn't mean a car should run at that – far from it For optimum fuel economy is usually bestDec 28, 16 · The reaction of mixture of fuel with oxygen in the air is cause from burning of fuel This is called airfuel ratio (AFR) AFR is the mass ratio of air to fuel present in an internal combustion engine For gasoline engines, the stoichiometric, A/F ratio is 1471, which means 147 parts of air to one part of fuel 2 It depends on type of fuelApr 23, 09 · it gives you an idea of were the AFR line should be when dyno'd when i dyno i try for around 1213 in a nice line, the smaller the number the richer the mixture ie 141 AFR is 141 parts of air to fuel 136 AFR is 136 parts of air to fuel meaning richer mixture
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Lambda is scale that relates the air to fuel ratio of ANY fuel 10 is stoic for every fuel (the chemically perfect ratio of air to fuel for a complete burn) However, stoic is different for every fuel Some fuels may need 147 lbs of air some may need 6 lbs of air for a complete burn Lambda 10 is always the perfect ratio for the fuel in useThere's no single ideal ratio that applies to all engines Some engines make best power at 131, others closer to 1251 Note that the air fuel ratio is by weight 131 means 13 pounds of air are mixed with 1 pound of fuel The usual target values for normallyThis question hasn't been solved yet Ask an expert Ask an expert Ask an expert done loading
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May 15, 18 · New to HP tuners, installed AEM Air Fuel Ratio gauge What I am seeing on gauge is what HP recorded in the files attached Seems lean at part throttle and idle O@ is install in stock rear o2 location It does not appear to be leaking Wanting to swap stock LS1 intake for LS6, but afraid it will get leaner I have added Borla cat back, headers, and cat deleteFeb 13, · Simply put, an airtofuel ratio is the measure of air compared to fuel involved in the combustion process For safety reasons, knowing what the airtofuel ratio curve is on your burner system is critical This curve measures the lowest amount of excess air that can be in the flue gas without producing carbon monoxide Every burner has a curveJan 03, 11 · Whats the ideal Air Fuel Ratio 73 911 E with MFI DC 30 cam grind on E cams JE 95 / 1 CR Following are my readings Idle 1000 RPM's 17 65 MPH 30 RPM's 125 WOT 2500 RPM's to 7000 RPM's 15
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Feb 10, 10 · For complete combustion, the airfuel ratio is approximately 15 1 by weight This ratio is known as chemically correct airfuel ratio in automobile engineering This is the ideal ratio in an internal combustion engine However, the airfuel ratio can be range from 1 to 8 1;The mix should contain 146 parts air for each 1 part of fuel However, in the real world, things don't work perfectlyJul 01, 04 · The best power and cruise air/fuel mixtures (CO) will burn all the oxygen in the cylinder and create the lowest amount of engine misfire (HC) and the ideal air/fuel mixture for each engine rpm and
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May 26, 17 · The 1471 ratio is perfect for idling and light throttle cruising conditions as it's the most efficient mixture possible, meaning the best fuel economy and lowest emissions However when we want the engine to start making more power (when we accelerate, for example) we don't want efficiency, we want powerIf so, it would be 111 1995 Eagle Talon TSi AWD Manual;I do not know what is best for part throttle cruise and idle though I
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In the case of pure methanol a ratio of approximately six to one, that is to say six parts of air to one part of fuel by weight This means a total of seven parts, one will be that of the fuel itself, that is to say a seventh, but since the actual weight of the fuel is eight poundsVariations as a function of compression ratio (CR) and air/fuel ratio (the equivalence ratio, (/» and, consequently, to identify possible ways for improving cycle effectiveness The working fluid in this analysis is a hydrocarbon fuel (octane) mixed with air Figure 1 shows the ideal Otto cycle in two thermo dynamic planes
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