AEM FIC finally out
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From: Calgary
Originally Posted by WLAURENT,May 31 2007, 08:44 AM
If you are tuning in the boosted range (above 0 psi) the PCM/ECU will be in open loop and there should be no conflicts
IF you change the injectors you need to scale them properly. For example if you take out the OEM 380cc injectors and install 600cc injectors, you would need to set all of your cells to -37 (dI=OEM/NEW-1) below the boosted range (</=0 psi). This should allow the PCM/ECU to properly control the car in closed loop operation since the F/IC will take the signal from the PCM/ECU and correct the pulse width for the larger injector. If scaled properly you should not have an issue.
If you make changes where the PCM/ECU could possibly be in closed loop (trying to manage A/F from O2 sensor feedback you could have conflicts between the F/IC and the PCM/ECU. For example if you use a VAFC/SAFC they simply modifiy feedback signals going to the PCM/ECU that cause it to think it is running richer, leaner, cooler, etc.. Eventually the PCM/ECU will catch on to your mischief and correct the problem itself.
If you want to use this to lean out an NA application for more power you will likely need to find out at what TPS level the PCM/ECU is forced into open loop and only make changes there. I am not sure what all conditions force the S2000 PCM/ECU into open loop. I know any MAP input above about -4in/hg will do it, and assume that TPS and a number of other sensor will do it also. For example - If you disconnect the primary O2 sensor the PCM/ECU will be locked into open loop (not optimal drivability and the idle Q sucks).
IF you change the injectors you need to scale them properly. For example if you take out the OEM 380cc injectors and install 600cc injectors, you would need to set all of your cells to -37 (dI=OEM/NEW-1) below the boosted range (</=0 psi). This should allow the PCM/ECU to properly control the car in closed loop operation since the F/IC will take the signal from the PCM/ECU and correct the pulse width for the larger injector. If scaled properly you should not have an issue.
If you make changes where the PCM/ECU could possibly be in closed loop (trying to manage A/F from O2 sensor feedback you could have conflicts between the F/IC and the PCM/ECU. For example if you use a VAFC/SAFC they simply modifiy feedback signals going to the PCM/ECU that cause it to think it is running richer, leaner, cooler, etc.. Eventually the PCM/ECU will catch on to your mischief and correct the problem itself.
If you want to use this to lean out an NA application for more power you will likely need to find out at what TPS level the PCM/ECU is forced into open loop and only make changes there. I am not sure what all conditions force the S2000 PCM/ECU into open loop. I know any MAP input above about -4in/hg will do it, and assume that TPS and a number of other sensor will do it also. For example - If you disconnect the primary O2 sensor the PCM/ECU will be locked into open loop (not optimal drivability and the idle Q sucks).
So just sum it up...
-All tuning should be done in the boosted range and dont change anything when in vacuum/closed loop.
-Scale the injector sizes appropriately
This will be enough to get SCers wanting a bit more boost running?
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From: Mesa
Originally Posted by elusiv,May 31 2007, 09:08 AM
This will be enough to get SCers wanting a bit more boost running?
Will allow you to install larger injectors if you want to add more boost also.
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From: AEM Electronics R&D
Originally Posted by stphotographer,May 31 2007, 11:58 AM
DelSolid:
Will this unit allow unlimited injector sizes or is the scaling limited to a certain percentage as per the E-Manage Blue?
Will this unit allow unlimited injector sizes or is the scaling limited to a certain percentage as per the E-Manage Blue?
Correction = ( stock injector / new injector ) - 1
Example: 360cc to 1,600cc injectors: = 360/1600 - 1 = -77.5%
Of course, you should only go to the injector size you need to support the HP you are going to make.
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From: AEM Electronics R&D
Originally Posted by copec,May 31 2007, 12:36 PM
Not to steal anything away from what seams to be a great features/price ratio of this but are you guys working on anything that could remap the feedback from the O2 sensor?
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From: Atlanta, GA
I noticed the this was produced for the 01-05 as it states in the forum. Will this by any chance work with the 06+? I have been waiting for a EMS for sometime now and it would be great if it did! I believe this would be the best way to go for mildly N/A applications.
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From: AEM Electronics R&D
Originally Posted by atlxkevinx,Jun 1 2007, 10:12 PM
I noticed the this was produced for the 01-05 as it states in the forum. Will this by any chance work with the 06+? I have been waiting for a EMS for sometime now and it would be great if it did! I believe this would be the best way to go for mildly N/A applications.
I should have my first article on the production 01-05 harness this week. Once it's approved then they will be made available.