Quote:
Originally Posted by KingLT1
No GM ECU that I recall ever ignored the maf signal for fueling in PE mode if dynamic airflow is disabled above set point. GM almost always disables dynamic airflow above 4k rpm and relies on MAF for final fueling. If the MAF is disabled then ECU relies on VE/VVE table for fueling. If the MAF curve is correct, then the AFR will hit the PE target.
That being said the 103 should not require rescaling the MAF, but you will likely need to adjust the virtual torque tables so the engine doesn't idle with negative timing.
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I’m just changing the snout right now, not the TB. I didn’t know that I thought they all went into Speed Density mode when at WOT. Maybe that was 3rd Gens, lol. This is why I haven’t messed with trying to tune myself, but I am quick to learn and this is such a minor change that it would be a good learning experience.
Im thinking I’ll do a pull this weekend, throw the new snout on and do a short pull maybe 4k and post results. I’d love to learn how to do simple modifications in the tune.
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2019 Shock 2SS A10. 2650@10psi/LPE HPFP/XDI+30/LT4 LPFP+JMS/Soler 95mm/Rotofab, E65, CSP 2” Headers/GESI GenII Cats. MM Wild/GM SG3 suspension/1LE Brakes, Velgen VF5 Wheels/GY SC3. JRE Tuned.