Tuning Knowledge
& Insights

Learn the fundamentals
behind performance tuning.

Explore the newest articles on tuning, diagnostics,
and what your logs are actually telling you.

Articles for: Chassis Tuning

Why WRX Knock Sensors Go Crazy on E85 (It’s Not Octane)

Your WRX's knock sensor lighting up on E85 despite ethanol's 105 octane rating? The problem isn't octane, it's tuning. E85 requires completely different AFR targets and timing maps than pump gas.

E85 vs Pump Gas AFR: Why 11.5:1 Is Wrong for Both Fuels

Most tuners run 11.5:1 AFR on both E85 and pump gas, missing the optimal targets for each fuel. E85 makes peak power at 10.8-11.2:1 with aggressive timing, while pump gas needs 11.8-12.2:1 for knock resistance.

Why Bigger Intercoolers Don’t Always Make More Power

Most enthusiasts chase the biggest intercooler they can fit, but the data tells a different story. Placement and airflow design consistently trump raw size when it comes to actual power gains.

Why Did My Intercooler Upgrade Kill Power? Stage 2 Tuning Fix

Your new front-mount intercooler is working perfectly, dropping intake temps 8-11°C below your old setup. The problem is your ECU is still running a tune calibrated for warmer, less dense air.

Why Your MX-5 Turbo Boost Oscillates at High RPM (PID Fix)

Your MX-5 turbo hits target boost smoothly at 3000 RPM but oscillates wildly at 6000 RPM because your PID controller can't handle changing exhaust flow dynamics. The solution isn't more aggressive tuning, it's understanding why single PID gains fail across the RPM range.

E85 Timing for 370Z: The Sweet Spot Most Owners Get Wrong

Most 370Z owners running E85 are leaving 15-20 wheel horsepower on the table with overly conservative timing advance. Our analysis of 50+ dyno runs shows the real sweet spot is higher than you think.

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.

Why Your $3000 Turbo Makes Less Power Than Expected: ECU Limits

That shiny new turbo making 20hp less than expected isn't a coincidence. Your stock ECU's fuel maps are the bottleneck strangling your expensive upgrade.

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 Stock Boost Controllers Leave 40+ HP Hidden in Your Type R

Stock boost controllers hit 22 PSI perfectly but leave 40+ horsepower on the table through conservative ignition timing maps. Recent dyno comparisons between Civic Type R and Golf R reveal the real bottleneck isn't hardware.

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.

Tuning Knowledge & Insights

Articles for: Chassis Tuning

Tuning Knowledge
& Insights