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Originally Posted by smurfmodsvr4
Can someone point me in the right direction for setup with speed density on narrowband (ie stock) O2 sensors? I will be buying a wideband next week but need something in the mean time to get me running.
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With just a narrowband/stock O2 sensor setup, you can tune using the trims.
O2 trim generally indicated how you are tuned. The main trims (high, mid, low) adjust slowly depending on what's happening with the O2 trim. The O2 trim reacts immediately.
with version 4.40, the VE table is a little lean around 2800, so you will want to add some counts to the mid and high tunes from 2200 - 2800, about 8% if I remember correctly.
You should be able to get an acceptable tune using the narrowband and trims. Speed Density takes more tuning to get set up than an AFC, so be patient and you will do fine.
Whan you start, you need to verify all the sensors and signals. The Pro calculates airflow based on the sensor signals, and needs good data....
Bob