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Articles for: Honda

Should You Skip Stage 1 on Civic Si? The Data Says No

Honda Civic Si owners debating Stage 1 vs jumping straight to Stage 2 with intercooler upgrades need to see the data first. Progressive tuning delivers more power per dollar than the shortcut approach.

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.

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.

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.

Tuning Knowledge & Insights