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Articles for: Data Analysis

Why Turbo Miata Builds Fail: The Wastegate Preload Problem

Most turbo Miata builds grenade because owners ignore wastegate actuator preload, causing dangerous overboost spikes under load. Your boost control setup matters more than peak power numbers.

Why Your WRX STI Wideband Shows 11.5 AFR But ECU Logs 12.8

Stage 2 WRX STI builds often show AFR differences between wideband gauges and ECU logs, with readings varying by 1-2 points. The discrepancy comes down to sensor placement, calibration drift, and response timing, not faulty hardware.

AccessPort vs Dyno Tune: What Your WRX AFR Data Really Shows

Peak power numbers lie. Your WRX's AFR consistency across the rev range tells the real story about tune quality.

Why Your Accessport Shows No Knock But ECU Logs 47 Timing Pulls

Your Accessport might show clean knock readings while your ECU quietly logged 47 timing pull events last week. Consumer monitoring tools only show you part of the story, and that gap can cost you power and reliability.

Honda Civic Si Boost Creep After Intercooler Upgrade: Fix Guide

That new front-mount intercooler might be sabotaging your boost control. Better cooling creates denser air, more backpressure, and boost creep past your wastegate spring pressure.

Why Two Identical Supra A90s Show 50hp Difference Same Mods

When two identical A90 Supras with the same intercooler upgrade dyno 50hp apart, your IAT sensors hold the answer. Peak power numbers miss the thermal efficiency story hiding in your datalogs.

OEM vs Aftermarket Knock Sensors: Which Protects Your Subaru Engine?

OEM knock sensors detect frequencies between 10-12 kHz that most aftermarket units completely miss. Here's what the actual datalog data reveals about which sensors actually protect your engine.

Why Your Knock Sensor Is Lying: Hidden Timing Patterns in Logs

Your knock sensor catches the obvious stuff, but three critical timing patterns only show up in extended datalogging. Missing these patterns is how motors get grenaded on seemingly safe tunes.

Why Your Intercooler Upgrade Is Killing Turbo Response

That expensive intercooler upgrade could be sabotaging your turbo response. Datalog analysis reveals why bigger isn't always better for boost control.

FA24 Knock Detection: Why the 2022+ WRX Tunes Differently Than EJ

The FA24's direct injection system changes everything about knock detection compared to EJ engines. Most tuners still use EJ strategies, leaving power on the table.

Does Higher Timing Advance Always Mean More Power? What the Data Shows

Most tuners think more timing advance equals more power, but the data tells a different story. We analyzed timing vs torque curves from hundreds of dyno sessions to find what actually makes power.

Why Do Big Intercoolers Kill Power? The Pressure Drop Problem

That massive front-mount intercooler dropping your charge temps 25°C sounds great until you see the dyno sheet. The real story is in the pressure drop data your tuner should have checked first.

Tuning Knowledge & Insights

Articles for: Data Analysis

Tuning Knowledge
& Insights