Looking for a good tuning guide/book

**dave w** · 03-30-2014

I've attached a few screen shots to start the discussion of tuning.
A few key words:
LV8
MAF
Frequency

I don't have experience with a Supercharge Buick V6. In my thinking, the .adx file needs to be updated. The MAF frequency vs. grams per second will need adjustments when making performance changes to either the engine or a .bin file. In my thinking the injectors are controlled by the grams per second of air flow measured by the MAF sensor. In my thinking, when the supercharger goes into boost more air is flowing through the MAF, which outputs a higher frequency to the PCM. The PCM will increase the injector pulse width with a higher MAF frequency.

I don't have experience to know what happens to performance of a supercharged engine when adjustments are made to the MAF frequency vs. grams per second. I'm wondering where the BLM system is in the Buick supercharger PCM? In my thinking, making adjustments to MAF frequency vs. grams per second with BLM's would be ideal. I'm wondering what would be recorded in a data log if the Z axis was configure for BLM with X / Y axis set up for MAF / LV8.

If I only had a Supercharged V6 car to experiment with.

dave w

**th3fr4nchi5e** · 04-04-2014

Thanks Dave! What am I looking for when adjusting the MAF tables? If that is controlling the injector pulse width as well, wouldnt it already be compensating for and airflow changes Ive done the the car? And I know LV8 is a measure of load but Im not sure what is considered a high value or low value? I assume you will want a richer AFR with high LV8 values and a leaner or more normal AFR for lower values? So if there is no table that uses BLM in my PCM, would you recommend I tune the MAF frequency table by monitoring BLM after changes are made?

Dave N

**dave w** · 04-10-2014

Hi Dave,
With you help, I was hoping to get a data log with the .adx set up to record BLM vs. LV8. I think there is something similar in the older MAF style TPI .adx for recording BLM vs. LV8? I don't know enough about the supercharged V6 to feel confident about making adjustments.

dave w

**th3fr4nchi5e** · 04-11-2014

Oh, gotcha! I will try to set it up to read that way or find something similar from what can be read. Will play with it soon and record what I come up with!