Power Vision Information Thread
#761
06-21-2011, 08:33 AM
Cruiser
#762
06-21-2011, 09:26 AM
My O2 sensors are still installed and connected, but not in use. The open-loop map definately fixed my problem, but I do plan to use the O2 sensors in the future for data logging/tuning so I don't want them to get damaged.
Last edited by iclick; 06-21-2011 at 09:32 AM.
#763
06-21-2011, 11:57 AM
Tuning Runs
I have read the instructions over pretty well and understand that with the stock sensors and logtuner basic, I will cover about 2/3 of the total map, which is OK for now. The instructions say to ride as usual and try to vary load and RPMs. This makes sense to me. My question is, what if I tried the (gasp!) TTS method where starting with first gear all the way through 4th or 5th, start at 5% Throttle, hold for 10 seconds, then go to 10% throttle, hold for 10 seconds....do this until you hit 50-60% throttle then move to the next gear and repeat. I did this on my softail with the TTS and had a dialed in map in only 3 runs. Would this be an effective method with the PV? Thanks for any advice/input.
TedMan
TedMan
#764
06-21-2011, 12:35 PM
Platinum Sponsor
On 08-up DBW bikes the Throttle position and Twist Grip position are going to be different. TP is the actual % of the throttle blade, because there is no IAC and the actuator controls the idle speed with the blade itself it will never read 0% unlike the Throttle grip which will read 0% at idle and 100% at WOT
__________________
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
#765
06-21-2011, 12:45 PM
Platinum Sponsor
Can anyone explain why running the engine with the O2 sensors installed but not connected would damage the O2 sensors? I am concerned about this because I am currently running an open-loop only map that I got from FM because I was having a lot of low RPM/low speed surging/hunting behavior that I thought was due to the O2 integrators. My O2 sensors are still installed and connected, but not in use. The open-loop map definately fixed my problem, but I do plan to use the O2 sensors in the future for data logging/tuning so I don't want them to get damaged.
Seems to me that I lot of folks used O2 eliminators with the PC's and I don't recall hearing about this O2 sensor issue.
I really like what the PV and Jamie's tune have done for my Sportster. We have had many 100+ degree days here lately and my bike runs very well. No surging, hunting, pinging, sputtering or popping.
Seems to me that I lot of folks used O2 eliminators with the PC's and I don't recall hearing about this O2 sensor issue.
I really like what the PV and Jamie's tune have done for my Sportster. We have had many 100+ degree days here lately and my bike runs very well. No surging, hunting, pinging, sputtering or popping.
#766
06-21-2011, 03:07 PM
Cruiser
Join Date: Mar 2009
Location: Texas
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
Thanks Jamie!
#767
06-21-2011, 11:55 PM
#768
06-22-2011, 07:15 AM
Road Warrior
I have read the instructions over pretty well and understand that with the stock sensors and logtuner basic, I will cover about 2/3 of the total map, which is OK for now. The instructions say to ride as usual and try to vary load and RPMs. This makes sense to me. My question is, what if I tried the (gasp!) TTS method where starting with first gear all the way through 4th or 5th, start at 5% Throttle, hold for 10 seconds, then go to 10% throttle, hold for 10 seconds....do this until you hit 50-60% throttle then move to the next gear and repeat. I did this on my softail with the TTS and had a dialed in map in only 3 runs. Would this be an effective method with the PV? Thanks for any advice/input.
TedMan
TedMan
That is a very good process to cover more areas of the map. The tuning process for the PV and TTS is really the same. You cover as many areas of the map - combinations of RPM, load, etc as possible to make get the VEs as correct as possible. Nothing wrong with what you described - on a closed course of course
#769
06-22-2011, 07:18 AM
Road Warrior
If you set the higher ranges to 14.6 be sure to reduce your timing in those areas during a tuning run. You should reduce it by at least 4 degrees. If you don't you run the risk of detonation. The engine really should not run that lean in those areas with the spark advanced.
#770
06-22-2011, 07:21 AM
Road Warrior
That's it, and you make three so far having this exact problem, but the first I've heard about with a late-model bike. I've reported this to DJ. This seems to affect only the gauges and PV operation, not datalogging, so if you aren't using the display function you likely wouldn't notice any problem. BTW, I've been told that we should not be running the engine when the O2 sensors are installed in but not connected. This can damage the sensors.
Is anyone having this problem with the newer single-module units?
Is anyone having this problem with the newer single-module units?
See my note I copied you on to DJ on my latest testing.