Quote:
Originally Posted by GregWeld
I think the key to ALL EFI is to stop thinking what you KNOW (or think you know) and start with a fresh attitude to learning about the system you're installing and think about WHY they instruct you to do certain things. Electrical system health and voltage are critical to these systems. That means really good electrical to all the various sensors. Some idiots put thread tape around the fittings making the grounds bad... Trust me -- it's all the little things you USED TO DO that bite you in the ass when you're working on EFI.
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All true, and very good advice. But if you're suggesting that the only reason these systems sometimes fail to work well is lack of attention to detail in the install - well, as described above, I have painful personal experience to the contrary. The cynical part of me wonders why there would be a need for a new, improved XFI 2.0 at all if "1.0" always worked so fabulously.
It seems Mark has figured out more than I did about how to fool these systems into doing the right thing, and kudos for that. But I wonder what the point is, when for just a little more money you can get a system like the Holley HP which has very good self-tuning capability for the fuel curve, but still allows for easy tweaking of transient fueling, idle, throttle follower, and spark advance if required - all those things that can make the difference between an engine that runs and one that runs really well. Yes, you have to have a computer to load the initial tune - but how many folks on this forum are really that afraid of computers?