EFI for everyone
08-20-2014 | 10:13 PM
#371
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Joined: Jan 2009
Posts: 721
Likes: 3
From: Algonac MI
You don't need to spend the whole day, it'll do it in 10 minutes. Go drive around once you're up to temperature, and hit as many load points and you can, over trimmed, under trimmed, hard accel from various rpm's, easy accel, try to hold each rpm point for 5 to 10 seconds. Then stop, transfer learn table to base and hit smooth. Now turn the learn gain down to 25% and do it again. If everything is + or - two to three percent then you can turn off the learn. If it isn't, transfer, smooth, and do it again. Once that's done you can turn the closed loop off, or if your O2's staying nice and dry, just turn the learn off and set your closed loop correction to 10% and let er rip.
08-21-2014 | 06:57 PM
#373
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Joined: Mar 2008
Posts: 1,181
Likes: 2
From: Vancouver BC
No, it tunes real time, incredibly fast. It just shows you what it has learned, which is better then overwriting your base map wether you like it or not. You can erase what it's learned, just leave it, or transfer it permanently to the base map any time you like.
08-21-2014 | 08:50 PM
#375
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Joined: Mar 2008
Posts: 1,181
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From: Vancouver BC
Both. The base map, plus whatever percentage it's had to add or subtract in order to maintain the commanded AFR. It just shows you the percentage on a different table. The benefit is, say if you had a misfire at a certain rpm and the computer added a bunch of fuel, thinking it was lean. You don't want that section corrupting your base map, so you can erase it, or you could transfer it and then remove the percentage in the affected section. When you transfer it, it shows the exact cells in the base map that were adjusted by marking them with a green dot. This allows you to do some more smoothing in the untuned areas if you want. It will also save your base map if your O2 sensor takes a dump while it's in learn mode.
08-22-2014 | 11:20 AM
#377
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Joined: Nov 2005
Posts: 4,554
Likes: 3
From: Fredericksburg, Va
sure wish we could get a 02 to live in these damn lightning silent choice headers, just built a dump tube with a angle cut piece in the header, and looped around back into Y-pipe, so 02 was out of the header...lasted about 2 mins at cruise 3500...when I pulled it out a few days later...02 had rust so water even got out to the there...
08-22-2014 | 11:40 AM
#378
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Joined: Jan 2009
Posts: 721
Likes: 3
From: Algonac MI
sure wish we could get a 02 to live in these damn lightning silent choice headers, just built a dump tube with a angle cut piece in the header, and looped around back into Y-pipe, so 02 was out of the header...lasted about 2 mins at cruise 3500...when I pulled it out a few days later...02 had rust so water even got out to the there...
08-31-2014 | 09:54 AM
#379
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Joined: Aug 2007
Posts: 2,960
Likes: 7
From: Sandown, NH - Sebago Lake Region, ME
Been doing a bunch of research in preparation for my efi journey this winter. Been reading every forum post over at forums.holly.com in the efi section. Stumbled across a post about moving the o2 sensor out of the exhaust stream. It looks like this has been done with great success! Maybe it would help with some of those having reversion issues?
http://www.innovatemotorsports.com/x...cat=250&page=2
http://www.innovatemotorsports.com/x...cat=250&page=2
