Quote:
Originally Posted by Roki_014
R u guys aware before they leave the factory they are red lined in every gear, even when i picked it up at the welt they told me to go a head as fast as i could go
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sure, 40 years ago.. Today BMW test engines in a test cell, no transmission attached. To cut down on test time, each engine will be tested in a known cold state, that is cold engine to start with, warm fluids going in, and a 1-2 minute test max. It ain't redlined, is is tested to achieve a certain level. By testing each engine exactly the same way you can predict future (post run in) performance at normal operating temperature.
There's three stages in engine testing:
- "cold" = sounds like bad, but you start with well known conditions which change predictable during a short test. If you get X% performance the engine is good. These are checked against durability test with one per hundred, or per thousand.
- "warm up" = a state where you really don't know where each fluid/component is temperature wise, and not reliable for testing
- "warmed up" = Nice to have but too costly