Hi all
Maybe the combined experience of this forum can advise me....
I have a 2011 FXDB that's still being run in. On the weekend I replaced the exhaust with a V&H ProPipe HO 2-1 and fitted a Big Sucker stage two air cleaner. I fitted active air and exhaust eliminators to the plugs.
I settled on QD176 TTS calibration as a starting point , turned off the active air and exhaust and set the bias tables at 681 as suggested here. I haven't done any data collection yet, but hopefully on the weekend....in the lower rev range at least.
The bike doesn't return to idle cleanly, 'hanging up' momentarilly whenever the trottle is closed. The situation improves slightly with engine temp, but doesn't go away. When riding, shut the throttle and there is a burble from the pipe reminiscent of the sound of a diesel engine brake...but only for a few seconds then the sound changes suddenly. If you crack the throttle just a touch the burble also stops. There isn't any popping to speak of from the pipe, just this burble.
Looking through TTS documentation I suspect the culprit is the "deceleration enleanment" table. I don't really want to go changing things blindly, so thought I'd ask here if anyone has had a similar issue and how they fixed it.
The 6th gear light has also stopped working, but apparently this can be fixed by changing the primary drive ratio in constants, so I'll try that next time I load calibrations.
While I'm at the question thing....Temperature, as used in the calibration tables:- does this refer to actual engine temp or intake air temp?
Thanks in advance for any advise
Thanks Hilly.
the cable was the first thing I checked. I also removed the airfilter and remounted it...just to check everything.
Temperature...eg in the decel enleanment table the rate changes relative to temperature. Where is this temperature measured? Is it intake air temp? Cylinder head temp? Or..? The documentation doesn't seem to make this clear
Hi HogBagger,
I tried that, it made no difference.
Riding home tonight I paid particular attention and it seems to me that the decel enleanment table is the most obvious culprit. You can feel, and hear, when this table ceases to affect the fueling....it's really quite savage. I'm suspecting it's set too lean....lean mixture (usually courtesy of intake leaks) being a classic cause of idle-hangup. I'll try some VTune runs over the weekend and if it's still an issue I'll try richening that table 5-10% and see what happens. One thing I really like about this TTS is the ease of trying changes to the calibrations (must remember to call them that and not maps )
Fuel consumption was pretty good on this tank, 18 and a bit km/l, but most of that was highway riding and half of it pre - 6am.
Yesterday I hooked up the laptop and went for a ride. VTuned the results and installed that calibration. Slight hang up still there....or is it just the way these engines return to idle?
Burble on overrun, which suddenly stops after a few seconds, is still there, but this was only the first VTune run. After the run I tried 10% richer on decel enleanment with no real change, so I returned that table to how it was.
The bike feels much crisper now, and I'll do some more runs when I get a few more kms up.
Doing this work has pretty well confirmed that the temperature used in the tables is engine/head temp.
I feel the pipe is a little too loud. My son and a friend reckon I'm wrong and just getting olde, but I leave for work at 5am and see no need to alienate neighbours. WA police like handing out canaries for noise, (and the local pits guys have a bad habit of using the dB meter incorrectly....shoving it in the exhaust outlet!....I've seen them fail an absoulutely stock Jap bike!) so I've ordered one of V&H's "quiet baffles". I'll fit that and see how it is before doing more VTune runs. I like the tone of this pipe, but in our noise-angsty Fun-Police society the level concerns me. Changing pipes all the time can be a pain....
i have v&h quiet baffles in my big shot stagger they do not quieten them by much i leave at 4am wife reckons she can hear bike to the end of the street and the neighbours love it too , Lucky I have good neighbours
My understanding is that AE176 is for a stock bike with standard exhausts....am I wrong? The QD176 was recommended for 2-1 pipes by a fellow forum member in another thread on this site, so I went with it. The 'touring' exhaust was described as having similar gas flow to a 2-1, which does have some logic to it.
The only 2-1 calibrations I could find involved non-standard cams.
I don't have idle 'trouble', it's just that the engine doesn't return to idle as quickly as I'm used to.... this is my first injected HD, even though I've worked on plenty in the past. It's been a couple of years since I had spanners on one, so what I see as an issue may be completely normal.
Time will tell :-)
*edit*
I just had a look at the pipe you're using....very similar dimensions to mine, so maybe the AE176 is worth a try....
I've had a modified AF176 calibration sent to me by a fellow forum member. I programmed this into the ECM and started the bike. No hanging up at all. I re-programmed with my QD176 based cal and it started hanging up again. Re-installed the AF176 and test rode.
The 'jacobs brake' noise is gone from the exhaust along with the savage change after a few seconds. There's no hanging up at all. There is a little over-run popping now, but that will be dealt with during VTuning runs. Chuffed I am! I'll go for a decent ride tomorrow.
Once I get some VTuning runs in, and have a final Calibration I'll post it at the TTS site.
Thanks Everybody, and especially Gregg.
