DYNOJET: High MAP at idle - fixed by Power Vision support
#121
Well said UltraNutZ
The worst thing about the Internet (he said with 30 odd years in IT) is this stupid and growing expectation that everything is free.
Even nephews turn into mercenaries when they realise there is some pocket money in it
The worst thing about the Internet (he said with 30 odd years in IT) is this stupid and growing expectation that everything is free.
Even nephews turn into mercenaries when they realise there is some pocket money in it
#123
I couldn't agree more. It was nice to have him posting on here, answering questions. I haven't seen anyone from DynoJet or Harley on here answering questions about their EFI tuners.
#124
Steve Cole was asked by me to come back and be a guest of the new Dyno Room. I also heard he was signing up to sponsor this forum. There was a snag with that and his account was deactivated until this has been resolved.
#125
Good news! Steve is an asset to the forum, hopefully if they get this resolved people can get over personal issues and do what's best for the community. Thanks for the update Wizard.
#127
if you've ever called the DJ tech line and received all that wonderful help from them, you'd understand why we don't want them here answering questions about their EFI tuners.
Your best source of information for DJ products is a vendor here. DAMN! did I just say that?
#130
PowerVision does not allow the end user to change settings related to cam events, you must contact DJ support or a tuning center that has a copy of the WinPV software that has access to the settings. TTS does allow user to change settings in its own way. FP3 allows this in its own way as well.
(Dynojet info): "As was explained to me, the intake vacuum varies greatly from moment to moment on a running V-twin. If we want an accurate Map reading, we need to read the Map sensor at the correct time. Harley uses the crank sensor for this purpose, so start reading Map on this crank tooth, stop reading Map on this tooth. The pressure during that start-stop interval is our Map reading. If you change the cams, and the valves open and close at different times from the stock cams, you may have to adjust which crank tooth you start and stop reading the Map sensor. Because fuel and ignition timing are adjusted based on this Map reading, it is critical you have a correct reading. If this is wrong, it may be impossible to tune the engine correctly."
High Map at idle could be an indication of incorrect crank tooth / map read settings in the tune file, or, it could also be due to other factors like timing, VE and CDE settings. I can take my same tune file, change the CDE table numbers in the idle rpm area, and watch my idle map go up to mid 40's from mid 30's. So there are other variables at play here to getting the tune right, but as long as you know the crank tooth / map read settings are generally correct in the tune file for your cams, you can tune the rest of it from there and get it right.
The idle Map kpa number itself you're seeing may or may not be fine for the particular set of cams installed. it really depends how the bike runs and how the logged data looks after a run. some guys I've exchanged info with that have well tuned bikes idle in the upper 40's, some in the mid 30's. the number itself is not significant. sure over 50kpa could mean something is up. it depends.
Now that I have everything tuned in with the 57h cams, 50mm throttle body and 4.89 injectors, my idle Map at 904-910 rpm is 38 cold and 35 hot. thing pulls like a beast now. After a couple of TargetTune auto tune runs today my WB02s are tracking the lambda table values very close.
(edit) This is how it's running as of the other day, and was before the target tune auto tuning, VEs are just generally close but on the richer side. still finishing up fine tuning but could just leave it as is.
LA_Dog 2013 HD Breakout tuning - idle and revvs after cams, throttlebody, injectors upgrade - YouTube
Unfortunately you are not far off with that comment. Although in all fairness, DJ has indeed been directly helpful to a lot of PV owners, myself included. Other times not so much and I hope they improve on that end as the product itself does work very well. Let's not overlook the actual title and topic of this thread.
Last edited by ChickinOnaChain; 05-08-2016 at 06:47 PM.