Maps don't change by themselves, but properly designed ECM's do adjust to changing conditions. The adjustments come from lookup tables that correlate to changes signalled by the sensors, such as MAP (manifold absolute pressure), intake air temp, cylinder head temp, throttle position, rpm, etc. When it's done right in the original programming, the stock ECM will correct quite handily for changes in operating parameters such as load, altitude, air temp, etc., without the help of add-on devices.
I have yet to see, with the scant info the HQ folks give you, how this system by itself converts the stock narrow band closed loop system to a full time wide band system. The changeover from closed loop to open loop operation is controlled by the stock ECM, which this system doesn't eliminate or replace. I also don't see any information about how you go about changing the AFR settings if you don't like what the HQ folks decided you should have. Does this device have it's own internal map that you can modify, or is it like some so-called tuners that leave you stuck with what someone else claims is best? I've seen some of those, and they go from the BS units that run stock 14.7 AFR in closed loop and a one-size-fits-all 13.5 in open loop, to the ones that make no attempt at remaining legal and just pump lots of extra fuel all the time. What this system really looks like, physically at least, is the separate Auto Tune module that Zipper's sells to make their ThunderMax replacement ECM into a wide band system. That one only works with the aftermarket ECM, and not at all with the stock ECM. What's supposedly different with the HQ version?
Here's a suggestion to pass along to those folks at HQ; do like many others who sell this kind of equipment, post a full description of just exactly what this thing does (and what it doesn't do), along with downloadable instructions for installation and use. With that kind of information a person could possibly make an informed decision. Of course, my take on any of this sort of thing is that those who don't want to share information, or who just want me to "trust them", really don't want my business and they really won't get it. I don't trust people who want to sell me a $500 device with no real information, no questions asked and none answered. I stopped believing in the tooth fairy and the something for nothing deal a very long time ago.
BTW, the HQ web site leaves most everything to the imagination and very little actually spelled out, but if you read through the description it does seem to imply that you don't really have to use a SERT or other device unless you need to change timing. On a stock bike maybe. On a modified bike, no way Jose'. The base map needs to be reasonably close, even with so-called auto tune devices. Just ask the guys who bought and then tossed the Zipper's ThunderMax with Auto Tune how well it worked without a very good base map.
JMHO - Jerry
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Topic: Fuel management? (Read 3082 times)