sepst questions
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
The 13.8 you are seeing is what you are asking for on the afr map, not what you are getting, unless your ve tables are calibrated. Your closed loop bias table only sets the switching point between lean and rich when in closed loop. You are only in closed loop when the cell on your afr table is set to 14.6.
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Road Master
Joined: Dec 2008
Posts: 872
Likes: 20
From: Niagara Falls Canada
ve tables
i have about 5 test runs and have done a smart tune generate. will that recalibrate ve tables so it gets what i want it too. about half the cells in ve table turn blue when I hit upload then i save changes
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
The blue only indicates a change, not that it has been changed enough. This is one nice thing about the TTS as it shows by the shade of colour how close the changes are, white or light pink and you are good to go. You can also view a histogram to see where you have collected data. This is why when tuning with the SESPT I manually calibrate the ve tables.
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
Here is a 30% throttle run, front cylinder. I set the afr table to 13.5 every where.I have the dyno sensors in the pipe, replacing the narrow bands. I have the brake set to hold the bike at 2000 rpm. I have the bike in third gear and twist the throttle to 30 %. As soon as the brake pulls the rpm down to 2000 I push the sample button, which release's the brake and begins to sample the afr. Setting the afr to a constant number lets me reference to straight line. Anything below the line I subtract from the ve table and anything above I add to the corresponding cell. When the afr line is straight I know the ve table is calibrated, asking for and recieving 13.5. Then when the afr table is reset I know that where it asks for 14.6 or 13.2 I should get that afr. I do this for all 13 throttle positions, both cylinders. It usually takes a little more than an hour to collect all 26 samples and re-write the ve tables. I usually do this 3 times, then move on to the timing tables.
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Road Master
Joined: Dec 2008
Posts: 872
Likes: 20
From: Niagara Falls Canada
looks interesting lone wolf
I did a new map generate off the smart tune 5 sample runs about 1 hour each from cold start up recording right from pushing the start button, and what a difference it made. I had a flat spot from 1800 to 2200 rpm. the flat spot is now gone and it pulls like a tank. the original sert program didnt work well on low rpms. the upload after smartune changed about 60% of my ve tables, didnt do much changes over 3/4 throttle since I didnt spend alot of time over 4 grand. thanks for your help it has made a world of difference. Id still rather wait for dyno until I finish the build with heads and pipes. there is a dyno truck coming for 3 days to the ontario hog rally right in town where I live in 4 weeks if I have an extra 300 bucks I may breakdown and dyno it, he charges 150 hr for sert and 350 finished fee for tune on power commander.
Stellar HDF Member
Joined: Sep 2007
Posts: 2,459
Likes: 674
From: Vancouver Island B.C.
Be carefull with collecting data when the engine is too cold. Vtune will start collecting data at 165 degrees. On the dyno I do not start collecting data until 200. I can watch the afr get leaner as the bike warms up. The last thing you want to do is be correcting a rich mixture that is due to the bike being cold.
Last edited by Lonewolf176; Jun 29, 2010 at 08:41 PM.
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