Responses to your questions:
"so you running a closed loop cruise area of what AFR?"
This is what I understand: Since the only O2 sensors connected to my Harley ECM is the original stock O2 narrow band (NB) sensors, the ECM will operate in closed loop so long as the operating conditions are within the O2 sensors range – which isn’t a wide spread, but then again, the stock maps don’t ask for an AFR outside of the band. Therefore, in my case, closed loop operation is in a range slightly lower to slightly higher than 14.7 (14.2 to 15 I believe for stock O2 NB sensors). However, if there is ever a condition whereby operation occurs outside the limits of O2 sensor operation (i.e. the sensor’s voltage signal saturates) the ECM will switch to open loop operation (possibly a failsafe???).
That said, if there was ever a wide band (WB) O2 sensor installed to the ECM, you can expect you’d never operate outside that band (because it goes to a fairly low range <12 to a fairly high range >15) and therefore you’ll always be in closed look operation. Unfortunately, I don’t think you can ever have this option since WB sensors (4-wire) can’t be connected to the stock ECM (NB’s are 2-wire I think). The only solutions to have 1) WB O2 sensors and 2) Closed loop operation are:
A) to have an ECM that can be fitted with WB sensors (i.e. Zipper Thundermax) or
B) a piggy-back controller connected to the stock ECM that can have the WB sensors connected to that (i.e. Power Commander 5 with the WB Autotune)
C) There may be more, but I’m no expert
The other ECM piggy-backs don’t have WB O2 sensor connectivity I believe…so they with the ECM will always be open loop operation possibly closed only within the confines of the NB sensors if attached.
The maps I currently have from Jamie run richer than the stock Harley maps (neat feature of the Power Vision computer software is the “compare” tool which shows you the deltas between maps parameters (lambda, timing, etc). From the lambdas in his map, they are asking the stock ECM to operate in a range outside the NB O2 sensors during high RPM and mass air flow - so my guess is that my bike is operating in open loop in those map areas.
“you leaving the sensors in, or taking them out and running open loop after your done tuning?”
I moved the original stock O2 sensors from the stock header to the new Jackpot 2-1-2 header. I went with the Jackpot 2-1-2 because it has BOTH NB bungs and WB bungs. So if I ever want to install the Dynojet Autotune, I can. As noted in the original post, the Autotune will only connect to the Power Vision and that only for data collection into the PV so that you can create tuned maps. After that, you flash the new map (or any map for that matter) into the stock Harley ECM. PV and Autontun are then no longer required.
A quick note on the PV: the first step is to save the stock Harley map from the ECM. The PV will save it (can be backed-up on your home computer/laptop). Should you ever want to reload the stock map – presto, easy. No mess, no fuss, no ghost code, no hardware, no wires, all you have is a completely stock ECM in 1 minute. Handy for those who worry ECM tampering may cause havoc on warranty and dealer matters. Last, the PV sounds great: flash the map and unplug. Why not get one PV and flash a whole pile of bikes – wrong: once you save the original stock map of your bike, the PV “marries” to the bike and can’t be used for any other bike – ever. A real bummer if you want to sell your bike since the PV must go with it.
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Topic: Dynojet Power Vision + Jackpot 2-1-2 + V&H Hi-Output (Read 5230 times)