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This should be an interesting read for anyone interested in cars or engineering. BMW Service tested a large quantity of spark plugs, from cheap to premium and the results may surprise some:
Really? No data. The results are all qualitative and based on pictures that may or may not be accurate. I see many instances where it simply appears he did not capture the correct frame. With all other parameters remaining the same, spark (plasma) will degrade almost linearly with increase in pressure (at these levels), many of the photos don't support that [physics]. I would be more interested in power output of the plugs relative to live pressure conditions, then models compared. Numbers and graphs.
Really? No data. The results are all qualitative and based on pictures that may or may not be accurate. I see many instances where it simply appears he did not capture the correct frame. With all other parameters remaining the same, spark (plasma) will degrade almost linearly with increase in pressure (at these levels), many of the photos don't support that [physics]. I would be more interested in power output of the plugs relative to live pressure conditions, then models compared. Numbers and graphs.
This is really a case where all I can fall back on is expert opinion. I don't know enough on the topic to fairly state one way or another. The testing method appears reasonable but I'm open to other opinions.
This is really a case where all I can fall back on is expert opinion. I don't know enough on the topic to fairly state one way or another. The testing method appears reasonable but I'm open to other opinions.
It would be a bit more conclusive with some cold hard numbers to benchmark each of the models. This is more like spark plug show and tell, less of a test. Appearance is one thing but what is most important is how much energy is being produced in the chamber. It would be foolish to think that BMW does not have equipment to meter this process, it is essential for engine design.
Typo in my previous post; 'decrease' => 'increase'. Regardless, you have to also realize that many spark plugs are application engineered and inherently will not perform the same as other models.
It would be a bit more conclusive with some cold hard numbers to benchmark each of the models. This is more like spark plug show and tell, less of a test. Appearance is one thing but what is most important is how much energy is being produced in the chamber. It would be foolish to think that BMW does not have equipment to meter this process, it is essential for engine design.
Typo in my previous post; 'decrease' => 'increase'. Regardless, you have to also realize that many spark plugs are application engineered and inherently will not perform the same as other models.
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