Power Vision Information Thread
Tourer
Joined: Jul 2010
Posts: 353
Likes: 0
From: Land of the black buggy
UC, he doesn't know if 1 or 5 or all of them were false events. But it sounds like he's pretty convinced that pinging from cylinder to cylinder and all over the map is a cool thing to be happening. Whatcha gonna do...some just have there minds made up and nothing anyone says, expert or backyard DIY'er, will change them.
Didn't think so (based on your assumptions)
Yeah, 20-30 knock events scattered out across the map? Most likely false readings.
20-30 events in a tight cluster of 6-8 timing cells? You probably have an issue.
But you go right ahead and tell me what I'm doing.
Last edited by Earl IV; Sep 20, 2013 at 02:15 AM.
Cruiser
Joined: Sep 2013
Posts: 150
Likes: 13
From: Fl
Wow...20-30 logged knock events...I don't know. I'm no Power Vision expert but with Jamie's help at Fuel Moto (about 100 phone calls the first couple of months) and a whole lot of playing around with the PV and hours of reading, I gotta say I'm tuning those things out. I mean, it's EFI and you have the tool to tune with...why settle for that many knock events. I can pretty much guarantee that with that many events, most of them are real. When you examine the logs and look to the area that precedes the event you can really understand why it happened and what to do to fix it. I have no knowledge of what level of pinging is ok but I don't want any if i can help it. And whatever you do, don't turn off the bikes ability to retard the timing when it senses a knock event...I mean, thats just crazy talk.
Extreme HDF Member
Joined: Aug 2012
Posts: 11,392
Likes: 184
From: Big ol Titties
Wow...20-30 logged knock events...I don't know. I'm no Power Vision expert but with Jamie's help at Fuel Moto (about 100 phone calls the first couple of months) and a whole lot of playing around with the PV and hours of reading, I gotta say I'm tuning those things out. I mean, it's EFI and you have the tool to tune with...why settle for that many knock events. I can pretty much guarantee that with that many events, most of them are real. When you examine the logs and look to the area that precedes the event you can really understand why it happened and what to do to fix it. I have no knowledge of what level of pinging is ok but I don't want any if i can help it. And whatever you do, don't turn off the bikes ability to retard the timing when it senses a knock event...I mean, thats just crazy talk.
I really liked the way he pointed out that harley didn't use knock retard for a 100 years but all of a sudden we need it now. A little thing called efi and the ability to have way more ccontrol of ignition timing had a little to do with it. I know we all miss points but I'm kinda fond of my efi. The best part was when he said pining won't hurt a engine and it's not like it it can destroy a engine. That **** makes me laugh, pining could never blow a whole through a piston or anything.
Last edited by Uncle Chester; Sep 20, 2013 at 06:49 PM.
Tourer
Joined: Feb 2011
Posts: 434
Likes: 2
From: Wisconsin
I'm looking for a little clarity in understanding using PV. I've got the VE's taken care of. I want to work on just adjusting the timing via LT without changing the VE's as mentioned some posts back. It was stated that you should un-check the boxes for VE's so you don't alter them, but am unsure where you do that. Do you un-check the boxes when creating the value file? Or is there some place in log tuner?
Road Warrior
Joined: Jul 2012
Posts: 1,566
Likes: 55
From: Londonderry, NH
I'm looking for a little clarity in understanding using PV. I've got the VE's taken care of. I want to work on just adjusting the timing via LT without changing the VE's as mentioned some posts back. It was stated that you should un-check the boxes for VE's so you don't alter them, but am unsure where you do that. Do you un-check the boxes when creating the value file? Or is there some place in log tuner?
Cruiser
Joined: Dec 2008
Posts: 225
Likes: 6
I'm looking for a little clarity in understanding using PV. I've got the VE's taken care of. I want to work on just adjusting the timing via LT without changing the VE's as mentioned some posts back. It was stated that you should un-check the boxes for VE's so you don't alter them, but am unsure where you do that. Do you un-check the boxes when creating the value file? Or is there some place in log tuner?
Tourer
Joined: Feb 2011
Posts: 434
Likes: 2
From: Wisconsin
Thanks Crazylegs and nhrider1. It took me a little bit to see where you were talking about. I had tried a couple of times at the point where you load the value file and it never worked. I guess I thought that the stopping of any changes to the VE's had to occur way before the point of altering the original map that the values and new tune came from.
Road Master
Joined: Jul 2012
Posts: 876
Likes: 65
From: CT
How do you deal with knock events which are caused by heat? Was on a poker run, got stuck in back-up from construction followed by a couple miles of stop and go traffic.
This table shows my knock events. A few things to consider. My head temps were 288-309 when these occurred. The EIMTS was on and I heard the knocks when I slowly accelerated from a stop. Kinda like it knocked until the rear cylinder kicked back on. The entire rest of the day, I did not get any other knock events from either cylinder.
Thanks
This table shows my knock events. A few things to consider. My head temps were 288-309 when these occurred. The EIMTS was on and I heard the knocks when I slowly accelerated from a stop. Kinda like it knocked until the rear cylinder kicked back on. The entire rest of the day, I did not get any other knock events from either cylinder.
Thanks
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Extreme HDF Member
Joined: Aug 2012
Posts: 11,392
Likes: 184
From: Big ol Titties
There are tables that allow you to adjust spark advance by intake temp, head temp, and engine temp (this one is not used on my 08 tune). I have had to adjust mine a bit to compensate for high engine/intake temp. I started with intake temp first and went from there. You have to data log and/or pay attention to what the temps are on your intake/engine when you get a knock event. I started with intake as that was the closest table to the temps I was actually seeing the knock activity at. I finished my 107 build in June and we have been seeing temps in the 105-115 degree range. Not the easiest temps to tune in so right now everything is just good enough to run decently but not fine tuned, this should give you an idea of what direction you need to go.
Here is the spark adjust by intake temp. I added the values at 140 degrees ad it helped alot, the rest of the values are what FM supplied.
Here is the adjust by head temp. This is the values I was supplied by Fuelmoto, I have not needed to adjust these yet.
Here is the spark adjust by intake temp. I added the values at 140 degrees ad it helped alot, the rest of the values are what FM supplied.
Here is the adjust by head temp. This is the values I was supplied by Fuelmoto, I have not needed to adjust these yet.
Last edited by Uncle Chester; Sep 23, 2013 at 10:47 PM.
Road Captain
Joined: Nov 2012
Posts: 569
Likes: 0
From: USA
I'm looking for a little clarity in understanding using PV. I've got the VE's taken care of. I want to work on just adjusting the timing via LT without changing the VE's as mentioned some posts back. It was stated that you should un-check the boxes for VE's so you don't alter them, but am unsure where you do that. Do you un-check the boxes when creating the value file? Or is there some place in log tuner?