I'm struggling to get this turbo setup running right, and considering this is my first foray in to tuning, there's tons I don't know. I've read this book front to back, and while it has some good info on how fuel injection systems work, it says zero about tuning.
The setup is an OEM k27 turbo system off the old 745i cars, bolted on to my otherwise stock m30b35 motor. 36lb/hr bosch white injectors, Miller MAF/WAR, OEM downpipes, 2.5" single exhaust (I know, a bit small).
The current symptoms I'm experiencing are:
- Very rich, rough cold starts until engine temps hit about 130F. Lots of black smoke, stumbling, AFRs in the low 10s.
- Once warm, it coughs and sputters above 4k rpm, but AFRs stay in a reasonable range (12s to 14s)
- The engine dies completely if I go to WOT; just a total shutdown. AFRs go to max (over 22) when this happens.
- Warm idle normally sits about 14.5, but if I rev the engine the idle will stay rich for 5-10 seconds and then come back to 14.7 after sitting there a bit.
Would anyone mind taking a look at this tune and giving me some observations/pointers/advice? Thanks R3v!
Also, here's a video of the symptoms: https://vimeo.com/135318837
The setup is an OEM k27 turbo system off the old 745i cars, bolted on to my otherwise stock m30b35 motor. 36lb/hr bosch white injectors, Miller MAF/WAR, OEM downpipes, 2.5" single exhaust (I know, a bit small).
The current symptoms I'm experiencing are:
- Very rich, rough cold starts until engine temps hit about 130F. Lots of black smoke, stumbling, AFRs in the low 10s.
- Once warm, it coughs and sputters above 4k rpm, but AFRs stay in a reasonable range (12s to 14s)
- The engine dies completely if I go to WOT; just a total shutdown. AFRs go to max (over 22) when this happens.
- Warm idle normally sits about 14.5, but if I rev the engine the idle will stay rich for 5-10 seconds and then come back to 14.7 after sitting there a bit.
Would anyone mind taking a look at this tune and giving me some observations/pointers/advice? Thanks R3v!
Also, here's a video of the symptoms: https://vimeo.com/135318837
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