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Search Advanced search…. New posts. Search forums. Log in. Install the app. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. What does your boost gauge read on idle? Think i got a leak Hi guys, in regards to my last topic i thought i'd do another for this and it maybe useful for others to know.
Mark the boost pressure at that location. This is the boost pressure your turbo will need to start working. Now, in a neutral position, press the gas enough to produce a high rev of to RPM. Now, check the RPM and check how long it takes the turbo to produce a positive boost.
Note that down. This is the RPM that you will need to make your turbo push air. So, now that we have got the base marks, what do we do next? Drive around in different situations taking your car to the limit of normal operations. Keep an eye on the boost gauge and check the readings. These readings indicate how your engine would perform in different environments. Find the highest boost reading after driving for an extended period which will signal that the engine temperature is way too high for safe operation.
Mark the high and low points that you found on your boost gauge with a permanent marker to keep track. Make sure the ink is opaque so that you can read the illuminated light at night.
At idle, a boost gauge should read close to zero depending on the air temp. Boost pressure can be read on the boost gauge in PSI by following the needle. Boost gauge reading. Help please. Posts Latest Activity Photos. Page of 1. Filtered by:. Previous template Next. Tags: None. This step is almost similar to step 1 but the only difference is, you have to drive the car on a road instead of driving it on the dynamo.
Drive your car simulating different situations. The turbo in your car will react differently in every situation and give you a different reading on the boost gauge. The reading that you get is going to indicate the performance that your engine will produce in different environments. So, now you know how to read a turbo boost gauge. The gauge is connected to the engine intake manifold by using an airtight tube. A small amount of air from the intake manifold goes through the tube and physically moves the needle in the gauge giving us a reading of pressure created in the combustion chamber.
An electronic boost gauge works the same way as a mechanical boost gauge does. The only difference is, there are no physical connections to the engine intake manifold in the electronic boost gauge. An electronic boost gauge measures the pressure in the combustion chamber by using a sensor instead.
Electronic boost gauges are installed in more modern vehicles. Moreover, electronic boost gauges can also have needles as an indicator. By the way, if you ask how to read boost gauge if it is an electronic one, then the answer is — the same way.
The same reading way is applied both to the Mechanical and Electronic ones. As mentioned before, boost gauges are used exclusively on vehicles that use forced induction technology in the form of a supercharger or a turbocharger. Forced induction naturally exerts too much pressure on the engine if not tuned properly. A boost gauge is used to safely monitor the magnitude of pressure created during the combustion process. By taking the reading displayed on the boost gauge, you can fine-tune your supercharger or turbocharger such that, they do not exert excessive pressure on the engine.
So, it can be said that a boost gauge helps the life of your engine last long for an extended period and protects it from wear and tear. If air is not being forced into the engine, then the engine is sucking the air. And it causes a vacuum negative pressure. A negative reading on a boost gauge is — the amount of vacuum your engine is pulling.
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