any cons of full time open loop ?
Sep 14, 2014, 10:15 AM
#1
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any cons of full time open loop ?
As title says, i'm interested if there are any cons of running the car in full time open loop ?
If yes, what are they
If yes, what are they
Sep 17, 2014, 05:43 AM
#3
^^this, very hard to dial in and very inconsistent from season to season.
Also, EGR won't be activated on cruise, it may kills mpg even if you try to compensate the timing advance in the main map. Recirculated gases raise the combustion chamber temperatures making effective an increased timing advance.
I recently switched to mrfred wideband closed loop AFR control (9653) and absolutely love it. I target 15,6 and my AFR swing from 15,1 to 16,0. It will improve MPG for sure.
Also, EGR won't be activated on cruise, it may kills mpg even if you try to compensate the timing advance in the main map. Recirculated gases raise the combustion chamber temperatures making effective an increased timing advance.
I recently switched to mrfred wideband closed loop AFR control (9653) and absolutely love it. I target 15,6 and my AFR swing from 15,1 to 16,0. It will improve MPG for sure.
Sep 17, 2014, 06:56 AM
#5
Still pretty hard to dial and have a stable AFR. On MAF it's much more easy.
The inconsistence is much worse in SD when using the fuel temp sensor to read manifold temperature.
I did both and on SD I ended up switching it to closed loop (with wideband) to get much more stability. (post 240 for Evo 8)
The inconsistence is much worse in SD when using the fuel temp sensor to read manifold temperature.
I did both and on SD I ended up switching it to closed loop (with wideband) to get much more stability. (post 240 for Evo 8)
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