Quote:
Originally Posted by backpacker3
How do stock tunes not damage cars then? If what you're saying is true then a stock tune could damage a vehicle. My car is stock there are no upgrades and no aftermarket parts all maintenance parts are OEM spec therefore if I tune my car conservatively not maxing out everything to its limit (I wouldn't max anything out anyway) I don't see why another Sunfire of the same year, model, engine, and transmission couldn't use it. You wouldn't reach the absolute full potential of the vehicle but that's not the point of a flash tune.
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First of all Stock tunes can damage an engine, simply by trying to adjust to mixed up variables.
Now stock ECU tunes are designed to be safe over the entire range of temperatures and most consumable fuels. That means that there is efficiency to be found in just tightening up the base maps.
But not with a general tune.
No two engines are the same, even 100% original oem engines are not close enough for a serious tune on engine "B" to be afe for engine "A".
Levels of wear, dirt, lubrication, even construction tolerances and the local atmospheric conditions will effect the what makes a Safe tune.
Since each OEM has their own proprietary programming, the only way to effectively tune an engine. Whether its for performance, emissions or efficiency - the most important thing to do is to tune that engine and only that engine.