Good question — you’re right to double-check this before running the car. Here’s how it works for your 2020 Civic Si (1.5T) with an AEM Short Ram Intake (SRI) when tuning in Hondata FlashPro:
1. AFM Calibration Basics
The AFM (Air Flow Meter) calibration in FlashPro tells the ECU how to interpret the MAF sensor signal for the specific intake you’re using.
Hondata provides pre-calibrated AFM tables for certain intakes (like AEM Cold Air Intake, PRL, Injen, etc.).
Using the wrong one can lead to incorrect fueling (too rich/lean).
2. AEM SRI vs. AEM CAI in FlashPro
If Hondata’s calibration library does not list your exact intake (AEM SRI), you should not simply select AEM CAI. The MAF housing and placement can be different between the SRI and CAI, which changes airflow scaling.
Best practice:
Start with the stock AFM calibration (or the closest known match).
Then perform datlogging with a wideband O₂ to fine-tune the MAF curve.
3. Recommended Approach
In FlashPro Manager, select your base map (e.g., “Civic Si 2020 MT – stock intake” or a tuned map).
Under Calibration → Fuel → AFM, leave it as Stock unless you confirm Hondata has specifically tested the AEM SRI.
Do several datalogs (idle, cruise, WOT pulls) with your wideband.
Use the logs to adjust the MAF scaling table until your commanded AFR and measured AFR line up (usually 14.7:1 at cruise, safe enrichment under boost).
4. Why not use AEM CAI calibration?
The AEM CAI MAF curve is based on that intake’s tube length and sensor placement. The SRI is shorter and places the sensor closer to the throttle body, so the airflow dynamics differ.
Using the CAI table may cause fueling issues (lean spikes or rich bogs).
✅ Answer to your question:
No, you should not select AEM CAI for your AEM SRI. Start with stock AFM calibration, then use datalogging to adjust the AFM/MAF scaling for your setup.
_______
RSorder