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Originally Posted by
WeathermanShawn
While you may or may not have access to a Roadrunner PCM, under the EFILive forum 'Roadrunner', is an interesting tutorial concerning VE smoothing using Strims as a method of refining the VE curve.
RR does not give you any new functionality, it merely automates and speeds up the (incorrect) process. Thus, the results you'll get eventually will be the same, with RR you'll just get there quicker.
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Since Strims vary due to environmental changes...
you got it in reverse, STrims are merely a correction to make up for what we cannot account for properly through models. the problem is the proper attribution: since STrims are the final 'catch-all' correction, you have no way of knowing if you're making up for dirty MAF sensor, imprecise VE table, clogged up filters or injectors, bad calibration of...anything. So I wouldn't be in such a rush to attribute STrims to anything in particular, that's not what they're for.
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I am sure on a purely scientific engineering standpoint that someone will dismiss the technique or tell you why it will not work, but I would just simply suggest you take a look at it.
Tuning is more fun if something works, and unless you have a Doctorate degree in math or engineering, might be more rewarding to to something that might may satisfy your needs.
That's a slippery slope you're taking there. If you dismiss the scientific process, what are you left with--the ouija board?
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I opted for a Roadrunner, and did more to nail my VE curve in 2 hours than the previous 2 months. And it didn't require numerous pids or formula's.
And you still get the same wrong result, but you got there quicker! progress!
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Don't get me wrong, knowing math and physics are great, but the point of science is not to make everything harder, its to make to work for you.
and the fact that you dont understand something should motivate you to observe and discover, and not run toward the comfort or acceptable misery.
Shawn, for a guy that has asked some very insightful questions, you truly sadden me with taking the hit off SSpdDemon's "git-r-dun" crackpipe. There's a lot of ways you can get close enough to the limit of observable errors doing completely wrong things--if you've studied any science you probably know about the schemes people have come up with to explain the heliocentric sun system, or the 'negative' mass of air. Just because some hack works for you right now does not mean it will work for everyone else at any other time. Only proper science can provide you with the models universal enough to hold true regardless of conditions. Everything else is merely a hack, in the most pejorative meaning possible. If you want to understand this stuff in more details, I'd be delighted to explain it to you, I've sent you my contact info before.