Posted by jimg.allentown on September 27, 2019 at 06:28:02 from (24.115.193.250):
In Reply to: Stealth posted by David G on September 25, 2019 at 18:56:36:
Years ago, I went to a factory training school on emissions. This was when the whole emission thing was still quite new and most engines had little if any emission control devices. It was explained how the engineers arrived at certain methods of controlling emissions as well as how most emissions were formed. I learned a great deal about emissions in that class.
One lesson that has stayed with me ever since is that everything that is done to reduce emissions is a compromise between three major parameters: 1) emission levels. 2) fuel economy. 3) performance.
Emission requirements have to be in compliance with current regulations. That is not negotiable. The methods used to obtain those objectives can be manipulated.
Fuel economy is also important. Some methods of controlling emissions are not good for economy. Enter the compromise.
Performance is also important. whether it is acceleration rates or load carrying ability, that is what sells vehicles. Again, enter the compromise.
Engineers at every manufacturer are constantly working on ways to comply with regulations while not making the engine too sluggish or thirsty. They have hundreds of millions of dollars of research and development costs involved in bringing your engine to market. And, here you are putting your trust in some aftermarket outfit that might have tens of thousands of dollars in research and development costs to defeat the engineering in your engine. Really?
I can pretty much guarantee that your engine is now in violation of federal emission regulations. Aftermarket outfits are not playing be the rules as are the major manufacturers.
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