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EGT Vs A/F Tuning. Contributed By: SDSEFI There seems to be a lot of mystery and misinformation about using exhaust gas temperatures to tune engines. Claims by many EGT gauge manufacturers about it being the best way to tune an engine must be qualified.
- Get an overview in our engine tuning guide where we look at how to tune a car engine for power or economy. Find out how to tune a carburettor, fuel injected and turbo engines in our DIY tuning guide.
- We live in an age where the wrench is no longer needed to boost horsepower and torque. With the rise of onboard computer-controlled vehicles, it’s no wonder that aftermarket performance companies have found a way to optimize OEM programming. While generally known as “chips”, these flash programmers and performance modules use customized software to boost.
Lambda Tuning and Air Fuel Ratio refers to the same unit function. It refers to the ratio of air to fuel in an internal combustion engine. Both air and fuel are required for a BANG or explosion of power in the cylinder and if the correct amount of air is provide to completely burn all the fuel, then this is ratio is known as the Stoichiometric ratio, which is normally 14.7 AFR : 1 Lambda. 14.7 AFR (Air Fuel Ratio) – 1.00 Lambda Lambda tuning or Air Fuel Ratio is important to petrol engines, but it can be measured on diesel engines as well. The Lambda reading is simply the amount of oxygen REMAINING in the exhaust after combustion. When the engine is not operating on 14.7 AFR, it is polluting the atmosphere. Unburnt fuel becomes air borne hydrocarbons (rich fuel mixture) and excessive air contributes to nitrogen oxides resulting from high combustion chamber temperatures. Lambda tuning is of utmost importance to the engine because of environmental concerns (carbon emissions), fuel consumption (fuel saving) and power management. The following graph shows some fundamental relationships: |
https://entrancementcreations.weebly.com/how-to-instal-auto-tune-on-mac-with-32-lives.html. Before diving into the technical details, it is important to realize that very modern direct injection engines will stretch the limits however it is safe to say that at full power the above table applies, more or less.
How is the Lambda ratio measured?
With two different types of (oxygen) O2 sensors (probes).
The one most common type is the NARROW BAND lambda (in German: Sprungsonde) probe, which is only good to confirm that the Lambda ratio is 14.7.
One may extend the range a little, but the probe is useless below 13 Lambda ratio (rich) and above 15.5 Lambda ratio (lean). Even at these limits the accuracy is well, off. The probe supplies a voltage from 0 to 1 volt, and approx. 0.45V equals 14.7 Lambda ratio. The advantage of the narrow band probe is its relatively inexpensive and that the Lambda ratio can be read off directly from the probe with a volt meter.
The other type is the WIDE BAND Lambda probe. With some technical trickier the range of this probe is extended to 10.3 Lambda ratio and 35 Lambda ratio. This probe requires a controller, and the current through the probe is the measuring criteria. Zero current equals 14.7 Lambda ratio. For the average person this probe represents a problem because the voltage is meaningless, and the current has to be compensated and is not linear. However, the probe is vital in turbo and supercharger engines.
There is a significant trend: 10 years ago, the NARROW BAND probe was common, today it is doubled up with a wide band probe (before the CAT) and a narrow probe (much cheaper, after the CAT). Every reputable engine manufacturer is forced these days to comply with emission laws, and reduced fuel consumption, and customer demands for more engine power.
The compliance is done by a closed loop system. The exhaust oxygen is measured, and then compared to some preset limits, and then the fuel injection is adjusted to meet that limit. This is performed more than hundred times a second. Actually, it is performed so fast that the Lambda is measured for each cylinder, and then the individual cylinder injection is adjusted. This is also used to test each injector by randomly switching one injection off and confirming that the cylinder goes lean for one combustion cycle. Smart technology!
The closed loop system of modern cars applies mostly to idling and cruising. From the loop adjustment during closed operation a global adjustment is computed, which then applies to the open loop operation. The exact open/closed loop parameters differ between manufacturers, but any tuner can monitor them.
Can I change the Lambda loop setting?
Auto Tuning Game
Yes and there are many reasons: increased engine power, less fuel consumption, better engine performance. Sometimes, but not very often, one should correct the manufacturers settings. It is not that a manufacturer makes a mistake, but rather that he bows to market (financial) forces and fixes these settings with a last minute adjustment.
![Auto tuning game Auto tuning game](/uploads/1/2/6/1/126155032/825570919.jpg)
Lambda in a closed loop system can be tuned to suit your needs. This is possible by modifying the probe readings. If you want your engine to run richer at a certain spot, then you ‘fool’ the probes to be leaner. The engine ECU sees the leaner reading and will adjust the fuel up. Bingo, your engine runs richer!
Of course, for every probe you need to have an adjustment circuit. Once you have installed the tuning chip i.e. https://entrancementcreations.weebly.com/downloadable-books-of-robin-cook.html. SMT piggy-back, you will be able to tune every operating point of the ECU.
The following Perfect Power tuning chips will do Lambda Tuning:
Whats The Point Of Auto Tuning 2017
SMT8 Piggy-Back Unit
SMT8L Piggy-Back Unit
SMT8T Piggy-Back Unit
SMT8-FT Fuel Tuner Unit
Other related tuning articles:
Ignition tuning
Airflow tuning
Ethanol conversion
Visit the following links for more information on Lambda Tuning:
Product Manuals
Application Notes
FAQ’s
CARS.COM -- A car tuneup is an outdated service consisting of replacing parts to bring the ignition and fuel systems up to spec for maximum engine performance and efficiency. A traditional tuneup hasn’t been available or necessary for years. Today’s remaining tuneup services include new spark plugs and cabin air filter replacement. Both are part of your vehicle’s maintenance schedule just as much as checking tire pressure or getting an oil change are — and today’s “tuneup” services are likely to be more like checkups for your car.
Related: More Maintenance Coverage
Spark plugs, for example, are typically replaced every 100,000 miles. And the federal EPA and Department of Energy say that replacing a clogged air filter will not improve gas mileage but can improve acceleration by roughly 6 to 11 percent. The agencies do not say what benefit can be derived from fresh spark plugs, but computers that control today’s engines adjust the air-fuel mixture and spark timing to compensate for wear, such as when the electrodes on spark plugs are worn down.
Even so, some car owners still dutifully take their vehicle in periodically to have it “tuned up.” Instead, what actually happens is that service technicians will inspect and perhaps test the fuel, ignition and emissions systems to look for faulty vacuum hoses, oxygen sensors and various other parts that can hurt the car’s performance. The federal government, for example, says a bad oxygen sensor can give engine computers false readings and reduce fuel economy by as much as 40 percent.
Don’t Ask for a Tuneup, Just Follow Your Car’s Maintenance Schedule
Having your vehicle serviced and inspected periodically is a good way to extend its life and keep it operating efficiently. (Here are some signs your car needs to be checked by a mechanic.) However, walking into a repair facility and asking for a tuneup is a bad idea because it indicates you’re still living in a previous century with no knowledge of what your car actually needs and have extra money to spend. Alloc in dev c++. Some in the auto repair business will take advantage of those opportunities.
Whats The Point Of Auto Tuning Machine
Look in the owner’s manual for your vehicle (or separate maintenance schedule) to find what the manufacturer recommends, and see if you can even find the word “tuneup.” (Finding it with a hyphen counts; don’t worry, we’ll wait.) For example, we looked at the maintenance guide for the Ford Fiesta that also applies to other Ford vehicles. The first mention of anything related to a traditional tuneup was to replace the engine air filter every 30,000 miles. The only other related item was to replace the spark plugs every 100,000 miles. Auto tune setup best easy for live singer club band.
Now, to find a mechanic you trust and get some proper maintenance done, check out the video below.
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