Advice Needed: First Ride Analysis & Next Steps for Mazdaspeed6 with Upgraded Intercooler

[Iliya Chepishev]

Hi everyone,

I'm new to VersaTuner and would appreciate some advice on how to proceed with my setup. Here's a summary of my car and recent changes:
1. My Current Setup
Car: Mazdaspeed6 / Mazda 6 MPS (JMZGG82L601701331)
Aftermarket Intercooler:
Core Thickness: 76mm (vs. ~50mm stock) — better cooling, reduced heat soak
Drops IATs by 10–20°C under boost compared to stock
Supports up to ~1.3 bar boost (Stage 2 tunes)
Software: VersaTuner
OBD Connection: Openport 2.0

2. First Ride Analysis Summary
My initial data logging showed (analyzed by AI):
Inconsistent air/fuel ratios during load transitions (lean during initial acceleration)
Significant ECU corrections (-10% to +20% fuel trims)
Good overall airflow but noticeable dips in mid-range
Potential throttle body synchronization issues
No thermal issues (ambient temp 9°C)
Current injector duty cycle maxed around 12%

3. Prebuilt Map Selection
Given my setup, which of the prebuilt VersaTuner maps would you recommend as a starting point? My main goal is to first get maximum from the current setup when it comes at least to stable and secure performance.

4. HPFP Internals (CorkSport)
Do I need to install the CorkSport HPFP internals (I have it already) right away, or is it safe to run a prebuilt map with the stock internals for now?

5. Request for Advice
I'd appreciate any advice on:
Which map to start with given my analysis results
Whether to prioritize the HPFP upgrade
If I should address the throttle body sync issue before tuning
Best practices for further logging and tuning

Thanks in advance for your help!

[CrazyCanadian]

Can you post the logs.. Have you gone through some of the guides to understand what you need to log.. can you also post the tune you are working with..

I personally have little to zero trust in AI looking over a log.. There are things going on such as possible swings in your AFR that is likely normal..

[mituc]

If you already have the pump internals don't just keep them in a drawer... install them.
As for figuring out what is happening - post those logs you took and fed the AI with them. If you will log again please use this dashboard preset: https://www.dropbox.com/scl/fi/afnzjbrr ... gt6ii&dl=0
As for the prebuilt maps - you can basically chose any of them, they are all designed to work on stock cars unless stated otherwise (like the maps designed for setups with aftermarket downpipes or intakes). But of course before anything else you need to make sure your setup is sound, doesn't have any leaks (it looks like now it has some), and so on.
So let's see those logs and resume the discussion from there.

[Iliya Chepishev]

Thank you guys for your prompt responses.

I am providing the log file as attachment.

[mituc]

Most of the parameters in the log are not useful for what we're trying to determine. Also the mPa as the unit for fuel rail pressure offers too low resolution, so use PSI on that one. Also it's the desired pressure not the actual pressure, so doesn't help at all. You do not have engine RPM, load, spark, throttle, and a lot of other params that are really needed.
Please use the above preset and take another similar log and post it here (ideally post the .vtlog file).