2g Evo 8 ECU swap, injector tuning problems...
Oct 3, 2014, 03:04 PM
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2g Evo 8 ECU swap, injector tuning problems...
Hey everyone. I did the Evo 8 ecu swap on my 2g and I've been trying to get a basic tune without much luck. Here are my mods:
* Balance shafts removed
* EGR + EVAP removed
* 1G adjustable green-top CAS (base timing)
* Evo 8 ECU running TephraMod v7 (96530706)
* Ball and spring manual boost controller
* 1g BOV recirculated
* Autometer boost gauge (20psi)
* AEM UEGO wide-band O2 sensor and gauge
* FueLab 515 AFPR (43.5psi)
* 650cc FIC Injectors
* EVO III 16g turbo
* Tubular exhaust manifold
* EVO III O2 sensor housing
* 3" turbo back exhaust
* Walbro 255 fuel pump
* Fuel pump rewire
I am using a 2g MAF so I changed the MAF size to 286.0 and the MAF Scaling to a suggested scaling. I used suggested injector scaling and latencies for the 650s and started by dialing in WOT by disabling lean spool and setting all values above 100 load to 10.5. I was able to get WOT afrs to match no problem at an injector scaling of 609.
Next I did cruise trims (ltft-mid) by driving around (no boost) and they seemed to be perfect (-0.19 -> +0.15).
Idle however is where I'm having trouble. Idle trims (ltft-low) is maxed out at +12.5 and the stft is in the high 20s until the ltft-low maxes out and brings it down to around 12. I tried to fix this by adjusting the latencies, but it didn't seem to make much of a difference. The only way I was able to get my idle trims good was to increase MAF scaling by alot or MAF smoothing by like 30, but this would throw my WOT way rich. I could fix that by increasing injector scaling, but I feel like that's the wrong way to go about it.
Any ideas on where I should go from here? I feel like there might be something wrong with the MAF scaling / smoothing tables that I'm using, but I'm not sure. Thanks!
MAF Scaling:
MAF smoothing:
Injector latencies:
4.69V 3.312ms
7.03V 2.112ms
9.38V 1.080ms
11.72V 0.624ms
14.06V 0.360ms
16.41V 0.168ms
18.68V 0.048ms
* Balance shafts removed
* EGR + EVAP removed
* 1G adjustable green-top CAS (base timing)
* Evo 8 ECU running TephraMod v7 (96530706)
* Ball and spring manual boost controller
* 1g BOV recirculated
* Autometer boost gauge (20psi)
* AEM UEGO wide-band O2 sensor and gauge
* FueLab 515 AFPR (43.5psi)
* 650cc FIC Injectors
* EVO III 16g turbo
* Tubular exhaust manifold
* EVO III O2 sensor housing
* 3" turbo back exhaust
* Walbro 255 fuel pump
* Fuel pump rewire
I am using a 2g MAF so I changed the MAF size to 286.0 and the MAF Scaling to a suggested scaling. I used suggested injector scaling and latencies for the 650s and started by dialing in WOT by disabling lean spool and setting all values above 100 load to 10.5. I was able to get WOT afrs to match no problem at an injector scaling of 609.
Next I did cruise trims (ltft-mid) by driving around (no boost) and they seemed to be perfect (-0.19 -> +0.15).
Idle however is where I'm having trouble. Idle trims (ltft-low) is maxed out at +12.5 and the stft is in the high 20s until the ltft-low maxes out and brings it down to around 12. I tried to fix this by adjusting the latencies, but it didn't seem to make much of a difference. The only way I was able to get my idle trims good was to increase MAF scaling by alot or MAF smoothing by like 30, but this would throw my WOT way rich. I could fix that by increasing injector scaling, but I feel like that's the wrong way to go about it.
Any ideas on where I should go from here? I feel like there might be something wrong with the MAF scaling / smoothing tables that I'm using, but I'm not sure. Thanks!
MAF Scaling:
MAF smoothing:
Injector latencies:
4.69V 3.312ms
7.03V 2.112ms
9.38V 1.080ms
11.72V 0.624ms
14.06V 0.360ms
16.41V 0.168ms
18.68V 0.048ms
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jimib
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