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...well its just an idea, but I had to catch your attention:dunno:
The techedge wideband (I supposedly have one in the mail) has a re-programmable NB output curve. I plan on datalogging the stock o2 curve on my techedge, then programming that curve into the wideband and replacing the stock o2.
However, why cruise at 14.7 when you can get better economy up to 17:1 afr? I will be running 94 octane once Im tuned since Im still on stock IC and HG, and wouldnt want to detonate at high boost. The high octane should resist detonation to a fairly lean ratio during closed loop (low throttle) operation, so why not lean it out?
With a typical tuning device, its impossible to do once and for all, since the ecu is always fighting to bring it back to 14.7 afr. I plan on shifting the 'asymptote' (near vertical part) of the NB output curve of my wideband to a higher afr, from 14.7 to 15.7, 16.7 or 17 for example.
This way, I wont be fighting the stock ecu to get a nice lean mix while in closed loop, itll do it itself all the while thinking its at 14.7 afr as it switchs its 'narrowband' from lean to rich.
Of course, im sure its going to fuck with the open loop maps. Therefore, I am going to modify an HKS SAFR to only apply fuel (air) corrections while the ecu is in open loop (vf = 0v).
So, what do you think? Ill try 15.5 afr or something first, and push it as high as 17:1. I think I will get a thermocouple to watch EGTs via the techedge wideband as well, just to be safe.
check out the techedge wideband
The techedge wideband (I supposedly have one in the mail) has a re-programmable NB output curve. I plan on datalogging the stock o2 curve on my techedge, then programming that curve into the wideband and replacing the stock o2.
However, why cruise at 14.7 when you can get better economy up to 17:1 afr? I will be running 94 octane once Im tuned since Im still on stock IC and HG, and wouldnt want to detonate at high boost. The high octane should resist detonation to a fairly lean ratio during closed loop (low throttle) operation, so why not lean it out?
With a typical tuning device, its impossible to do once and for all, since the ecu is always fighting to bring it back to 14.7 afr. I plan on shifting the 'asymptote' (near vertical part) of the NB output curve of my wideband to a higher afr, from 14.7 to 15.7, 16.7 or 17 for example.
This way, I wont be fighting the stock ecu to get a nice lean mix while in closed loop, itll do it itself all the while thinking its at 14.7 afr as it switchs its 'narrowband' from lean to rich.
Of course, im sure its going to fuck with the open loop maps. Therefore, I am going to modify an HKS SAFR to only apply fuel (air) corrections while the ecu is in open loop (vf = 0v).
So, what do you think? Ill try 15.5 afr or something first, and push it as high as 17:1. I think I will get a thermocouple to watch EGTs via the techedge wideband as well, just to be safe.
check out the techedge wideband