Showing posts with label Understanding. Show all posts
Showing posts with label Understanding. Show all posts

Monday, October 10, 2011

Understanding Subaru air mass sensors

Understanding Subaru air mass sensors

Exhaust System

The improvement in engine performance due to mechanical upgrades, free flowing exhaust, intake, turbocharger and intercooler, the amount of airflow through the engine's thrust on the floor. Any increase in the flow of air is immediately picked up by the air mass sensor. This causes the following things happen:

Increased load forces unit in the areas of fuel and ignition maps to run, which is calibrated to what to eat in fuel blends, which are too fat, something of the powerProfits made by the parties, in the first place.

Pressure Reducing exhaust allows more advanced ignition, is scheduled to ensure the center of the series, such as controlling ignition on, run, thus compromising the potential for peak power.

Outside the realm of control of the active time of the unit is actually deaf, and is programmed with a set of timing values ​​safe. These values ​​are reliable ignition of an unmodified engine. At high engine speeds and loads of powermust be slowed, especially after the 6000 RPM, or start the engine explode.

Usually increases the engine load and engine speed, fuel and ignition mapping changes gradually in response to this. After the changes, the controller can quickly reach the end of its scale, so in essence fuel and times to establish the values ​​last September This leads to problems of reliability and drivability.

The control of a series of calibrated boost OE exhaust note and a suit of aspirationDynamics. Parts of the efficient control of overeating to throw too much out of sync for a closed loop pressure control to compensate. Increases wild fluctuations on the promotion or even under the promotion are all possible consequences.

Products that change the way in which the system management engine to solve the problems mentioned above divided into four main groups. These include the OE ECU re-flash, the installation of a type of add-on control valve, completeReplacement unit, replace and upgrade if plug-in chips. All these updates have their place in the grand scheme of things set up, each with its own advantages and disadvantages.

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Thursday, June 30, 2011

Understanding A Marine Exhaust System

Marine exhaust systems are an important and often neglected engine of a ship. Most ships have a system of "wet" exhaust. The outlet for the exhaust gases from the exhaust manifold - the salt water is injected into the column. This mixture of gas and water is then passed through a series of curves to it from the boat, preferably in the back.

Exhaust fumes mixed with salt water to create a highly corrosive compound. This is why exhaust systems are often non-corrosiveComponents such as nitrile rubber reinforced hose (brown - not green - stripe), galvanized steel, fiberglass or plastic. The purpose of these components, which vary in size and shape depending on the size of the engine and the layout of the engine room is to prevent the engine hydraulicing. This occurs when an engine full of salt water that entered through the exhaust and can cause considerable damage if left for more than two hours. The water enters the exhaust gas to swell in the tail and armDrain design. In some sea conditions, such as by sea, the water can again be forced to exhaust when the engine is not running. Drains poorly designed, that water will flow back and fill the waterlock / muffler box then the hose in the exhaust manifold, exhaust valves and combustion chamber. With the engine full of water can not compress the engine crank over, it is not like water.

Exhaust System

You will know that your engine is if you do not turn around hydrauliced ​​-usually after a long period of sailing - and removing the starter and make sure it works. To remove remove water from inside the combustion chambers, first of all injectors, crank engine blowing over the water, replace vent injectors, injector lines and restart. Then leave the motor running until exhaust fixed.

Check that the mast is not coke up or corroded - a common problem. To check the exhaust riser remove the drain hose from the riser (often a difficult procedure)and look at the line, to see if it is the accumulation of exhaust / salt restricted. When building the riser is too large to be removed in order to check the engine side of the line. Coke can be scraped away to be a short term fix although often the riser must be replaced. There are aftermarket systems which vary in quality. Make sure you fit the right model for your application.

Make sure that the water-lock is low enough and large enough to hold all the water in the exhaust system. There is aA gooseneck or central vertical loop in the vent pipe to rely on the mirror? It is a siphon break and function - without valves leak?

Exhaust is toxic and can cause motion sickness and headaches. Replace defective components immediately. Use double hose clamps on each joint or, preferably, super, the style of concrete drain bolt, if necessary. Hot sections should be insulated with fiberglass tape to prevent burns.

Asbestos Warning delayed. Many larger vessels andMarine engine installations had exhaust systems that were lagged with asbestos tape and rope. Asbestos was common in older boats noise.

Understanding A Marine Exhaust System

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