Why Dyno Numbers Lie: What 350Z Owners Should Track Instead
That 30whp difference between dyno runs isn't about one shop being wrong. Peak power tells you almost nothing about your VQ35DE's actual performance or tune quality.
What AFR Should You Run on E85? Honda K20 Data Shows Why 10.5 Kills
Running 10.5 AFR on E85 doesn't make your K20 safer than 11.5, it's killing it differently. Cylinder wash and oil dilution from over-fueling destroys engines just as dead as lean conditions, just slower.
Why Do Stage 2+ WRX Builds Fail More Often Than Stage 1?
Stage 2+ WRX builds fail at a 40% higher rate than stage 1 setups, and the data shows why. Most owners upgrade hardware without understanding that ethanol content changes AFR targets dramatically.
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 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.
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.
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.
Spring Tune Transition AFR Spikes: Why They Destroy Engines
Switching from winter to performance tunes creates hidden AFR spikes that can destroy engines in minutes. The datalog evidence shows why most seasonal tune transitions fail catastrophically.
Why 11.5 AFR Kills EJ257s: The Intake Temperature Factor
That Stage 2 tune with 'conservative' 11.5 AFR targets? It's murdering EJ257s across the country because tuners ignore intake temperature compensation. Here's why your safe ratio becomes lean death when IATs climb.