Finally got me an AEM Infinity for the Evo
Dec 25, 2014 | 08:09 PM
#46
I have a question for the Boz, knowing that your car was the test mule for the DSport cam test. The articles state that the Infiniti ECU allowed for the cams to be swapped without doing any tuning as the ECU compensated for any VE changes. The articles even listed the VE changes after cam swaps.
Now the only way I can see this working as the article implies is if the ECU is in full time closed loop and is also altering the VE MAP on the fly. However, in reading through the Infinity instructions, there is nothing about this. It does describe the method for setting up closed loop but there is nothing about the ECU automatically using closed loop feedback to adjust the VE MAP. The discussion about VE Map only states that the VE MAP should be adjusted to achieve target AFR.
Can you shed some light on this?
Now the only way I can see this working as the article implies is if the ECU is in full time closed loop and is also altering the VE MAP on the fly. However, in reading through the Infinity instructions, there is nothing about this. It does describe the method for setting up closed loop but there is nothing about the ECU automatically using closed loop feedback to adjust the VE MAP. The discussion about VE Map only states that the VE MAP should be adjusted to achieve target AFR.
Can you shed some light on this?
For the DSport test the was set and tuned at 20 or 21psi on pump e85 on the stock camshafts. I gave them enough fuel from the same pump and the same time as when I dropped off the car for them to complete there tests. The tune was not touched.
The infinity does closed loop adjustment to the VE but does not change the map. So there is a field you can see called New VE%, that is the one that reflects what the computer is using.
When I got the car home I switched from the AMS F1i back to a CB ported stocker, and went out and made pulls, the car maintained the AFR however I could see that I needed to adjust my VE based on the New VE% value. So any item that affects airflow in or out of the motor you will need to adjust your VE, everything else you need to adjust your trims.
Dec 26, 2014 | 08:22 AM
#47
Thanks for your reply. Do you normally run full time closed loop (i.e. under boost?).
I am a stock ECU enthusiast and not particular fond of AEM ECUs (I was one of the early buyers of the series 1 over 10 years ago), but the Infinity really seems to do it all at a very reasonable price.
I am a stock ECU enthusiast and not particular fond of AEM ECUs (I was one of the early buyers of the series 1 over 10 years ago), but the Infinity really seems to do it all at a very reasonable price.
Dec 26, 2014 | 09:12 AM
#48
Thanks for your reply. Do you normally run full time closed loop (i.e. under boost?).
I am a stock ECU enthusiast and not particular fond of AEM ECUs (I was one of the early buyers of the series 1 over 10 years ago), but the Infinity really seems to do it all at a very reasonable price.
I am a stock ECU enthusiast and not particular fond of AEM ECUs (I was one of the early buyers of the series 1 over 10 years ago), but the Infinity really seems to do it all at a very reasonable price.
I run closed loop 100% of the time.
I think the stock ecu's are amazing. People are doing some really cool stuff with them. The only downside to the stock ecu is the data logging, and no realtime map updating. The other one that is not super huge but you don't have user defined inputs/outputs. And no flex fuel support.
AEM really swung for the fences on the infinity. I have been having great luck with my car. I live in SoCal so I cannot comment on a cold start it only gets down to the 40's over here. Last night when driving home it was only 58* outside. So that is the only thing I don't have much info on. Other than that I have been super happy with it.
The one last thing is that Virtual Dyno does not play nice with the Infinity. I exported some logs from a few 700hp pulls, and when I interested them into VD they showed low 500whp. I had my car corner balanced and aligned so I have the exact weight, and I had it on a dyno jet so I know exactly how much power it is making.
https://www.evolutionm.net/forums/ev...hp-700whp.html
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