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semi-closed loop or full closed loop

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Old 10-08-2008, 11:34 PM
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Default semi-closed loop or full closed loop

So for the turbo guy are you running semi-closed loop or full closed loop after you get your ve table dialed in for your SD tune ?

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Old 10-08-2008, 11:37 PM
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neither. FULL open loop SD.
Old 10-09-2008, 10:38 AM
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are you COS-3 i assume. Im running OLSD but plan on going clsd just picked up some new 02's yesterday. Mine tends to fluctuate more than I want,even with my small elevation and climate changes as well as the multipliers set up in the COS. IE a0014
Old 10-09-2008, 11:18 AM
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Originally Posted by 7845
neither. FULL open loop SD.
Why? Fuel trims are good.
Old 10-09-2008, 11:26 AM
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Originally Posted by thunder550
Why? Fuel trims are good.
just never enabled the closed loop. I dont see a reason to go back at the moment. less things to fudge with the tune
Old 10-09-2008, 11:31 AM
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Originally Posted by 7845
just never enabled the closed loop. I dont see a reason to go back at the moment. less things to fudge with the tune
Well the way I see it is that due to weather conditions changing throughout the year, there will be small variations in the fueling requirements. Not enough to justify a full retune, but enough that running fuel trims would be beneficial. Even if he just did semi-closed loop where the short term trims run but the long term trims don't, it would at least keep his part throttle driving right around 14.7 where it's supposed to be.
Old 10-09-2008, 11:42 AM
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Originally Posted by thunder550
Well the way I see it is that due to weather conditions changing throughout the year, there will be small variations in the fueling requirements. Not enough to justify a full retune, but enough that running fuel trims would be beneficial. Even if he just did semi-closed loop where the short term trims run but the long term trims don't, it would at least keep his part throttle driving right around 14.7 where it's supposed to be.
im not saying at all he shouldnt. i was just saying what i run. i dont drive the truck all year around. its a toy, laptop never really leaves the truck
Old 10-09-2008, 11:47 AM
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SD with stft's enabled works best for me.
Old 10-09-2008, 12:02 PM
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Originally Posted by KySilverado
SD with stft's enabled works best for me.
YEP
Old 10-09-2008, 04:05 PM
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Most you guys are running semi-closed loop then?
Well ran full closed loop to work toaday and the LFTS looks good. Only thing i don't like is when you go into boost takes few seconds's for tha a/f to drop.


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