Blog Home

In this edition of Road to Horsepower, we put the Predator 212's Hemi and Non-Hemi heads to the test on a 223cc stroker build. With identical bottom ends and a high-lift cam, we swapped the ported Hemi head for the Wildcat WC946-3 Non-Hemi head to see which flows better, revs cleaner, and makes more usable power. The results show more than just peak gains—valve float, torque curve, and RPM stability all play a role. Dive into the dyno data, component breakdown, and deep technical analysis of why non-hemi heads dominate high-performance small engine builds.

Wildcat 223 Stage 4: A New Benchmark in Budget Performance

This blog revisits the Road to Horsepower journey for the Wildcat 223 engine, introducing the long-anticipated Stage 4 kit—a high-performing, cost-conscious upgrade designed to outpace Stage 3 results without the complexity of advanced valve train builds. Featuring the CNC-ported WC946-3 cylinder head, a newly developed .268 Reaper camshaft, and the high-flow PWK24 flat slide carburetor, the kit delivers a substantial power increase: 18.01 hp at 7700 RPM and 13.9 ft-lbs of torque at 6300 RPM—surpassing Stage 3 by 2.5 hp and offering a broader powerband.

The blog also explores why the Wildcat 223 remains a top choice over the Predator 224 Hemi and explains how EC’s Stage 4 setup rivals more expensive builds in power, while retaining stock-style components for easier assembly and affordability. Engine comparisons, dyno results, and tuning insights round out this deep dive into building a competitive, user-friendly engine for the 223/224 class.

Cast Aluminum Flywheel Installation & Ignition Tuning Guide

This guide outlines the proper installation and tuning procedures for EC's Cast Aluminum Flywheels designed for Honda/Clone taper engines. It includes fitment details, required tools, torque specs, and critical safety warnings to prevent flywheel failure.

Key topics include flywheel lapping, timing key installation, coil and spark plug gap settings, and flywheel removal procedures using proper tools. It also covers ignition timing optimization using spark plug readings or a dyno. It provides troubleshooting tips for common ignition-related issues such as no spark, kick-back, hesitation, and rev-limiting effects.

Improper installation or tuning may lead to serious engine damage. Always inspect the flywheel before each use and follow safety precautions closely.

This guide provides essential instructions for installing and tuning the EC PK875 Stock Appearing Carburetor, available in gas and methanol versions. Designed for racing applications, it includes detailed steps for proper gasket and insulator installation, air filter setup, fuel system compatibility, and throttle linkage connection.

Important notes cover the correct selection of fuel pumps, exhaust header requirements, and tank venting to ensure optimal performance. It also stresses the importance of not tampering with the main jet or emulsion tube due to the carburetor's precision blueprinting.

Separate handling and maintenance guidelines are provided for gas and methanol fuels, including post-race methanol flushing procedures. The carburetor is precision-tuned for specific fuels and should not be converted between fuel types.

EC Performance Cylinder Head Installation & Setup Guide

This guide provides critical instructions for properly installing and tuning EC Performance Cylinder Heads. It covers essential checks, including spring height, retainer and valve guide clearance, piston-to-valve and piston-to-head clearances, rocker geometry, torque specifications, and head gasket options.

Detailed recommendations are included for carburetor sizing, fuel types, ignition timing, spark plug selection, and compatible exhaust and camshaft setups. Methanol-specific handling and flushing guidelines are also provided.

These instructions are specifically designed for EC's PWK carburetors used on industrial OHV small engines based on the Honda GX200 platform (e.g., Predator, Tillotson, Wildcat, Ducar). While some guidelines may apply to other brands or engines, optimal performance and compatibility are ensured only with EC PWK carburetors on GX200-based engines.

EC’s decades of carburetor expertise provide detailed advice on installation, tuning, troubleshooting, and maintenance. Key topics include proper fuel system setup, carburetor angle, jetting adjustments, spark plug tuning, and environmental considerations affecting performance.

Note that carburetor performance depends heavily on the overall engine system and setup, and the product carries no performance guarantee or warranty once used with fuel. EC supports original customers post-sale but cannot guarantee assistance for second-hand purchases.

For optimal results, follow the provided troubleshooting tips and tuning recommendations, and contact EC for further assistance with engine specifications and purchase details.

Wildcat WC22/VM22 Carburetor Tuning & Troubleshooting Guide

Get the most out of your WC22 (VM22-style) round-slide carb with this quick guide to tuning and troubleshooting. Learn how to match your carb to engine mods, adjust jets and needle settings, fix idle issues, and avoid common performance problems. Perfect for Predator, GX200 clones, and Wildcat engines.