Quote:
Originally Posted by VR46
hokai, so - apparently i've touched off some kind of flame war. point was, the dyno operator was talking to me about how he thought it was quite lean in the lower rev ranges. that's what i was looking to discuss. good points were also made about instructions for they dyno operator. let's all just play nice.
Freddy, based on other posts I believe you live near me. Feel free to come on down and take my car for a spin, and you can give me your driving impressions.
|
You certainly did nothing wrong. Flames follow me in this thread like car-b-q's follow amateur automotive electrical mods.
I wish I could be more help with the lean low-rpm AFR condition. I have seen the same thing on most ESC AFR plots and many turbo apps. It's hard to avoid going lean when the boost suddenly kicks in while the ECU is still in closed loop. IMO a good tuning strategy would be a custom map (Ecutek) that dumps extra fuel based on MAP. Shiv might be able to do something similar using load. I accomplished the same using a MAP-activated AFR enrichment module on my last turbo car. Whenever boost was present the module made the AFR sensor read lean which made the ECU add fuel so that even in closed loop I could get an AFR of 12:1. But I was limited by having a locked Toyota ECU and you are not. I'm sure that a "flash" tuning solution exists for you.
Thank you for your kind offer. I may actually take you up on it.