Quote:
Originally Posted by Wo6M
Lol wow I guess years of experience working with engines and cars , not to mention schooling and the fact that I work at a dealership must mean o give bad advise.
The car runs rich at start up untill
O2 reaches 600 degrees (it has a internal heating circuit to help)
Coolant temp reaches a certain voltage output.
Pre set time must pass
Those 3 things are what usually run open or closed loop.
Drive it as soon as its started?
Clearly you guys don't understand the dynamics of the cylinder walls.
When cold they are a bit oval shape , when fully warm they become much more round.
The engine had no load before you put it in gear. If you drive it right after starting you risk scoring the walls because of the engine load and engine not fully warm.
But do as you will . It's your car .
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True if you're talking about redlining it out of the gate, I believe the general consensus is that driving it gently (for us, staying under 3k is how I would describe it, at most half throttle) is GOOD for warming up the car. As posted above the high idle has more to do with lighting off the catalytic converter than warming materials. You're not wrong, I just think your tactic is too extreme. Guess I'll post results in a couple years if it ever needs a rebuild of my daily "start, check mirrors, drive gently" routine and it's effects on cylinder walls.
Quote:
Originally Posted by slowbrz
I wish only the people who knew what they are talking about would provide me information so that Im not misled.
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NOBODY here knows what they are talking about. NONE of us have access to the terabytes of test data that auto manufacturers generate testing cold start up performance and effects of specific drive cycles on durability, we COULD extrapolate from material data bases with the thermal expansion coefficients and lifetime stress data and make approximations or carry out our own tests a la Mythbusters.
Or we could take our best guess, realize that most engines make it to 200k without significant issue and at that point it is financially trivial to rebuild or buy another.
:happy0180:
Credentials: Rocket Scientist