Plan Smarter Go-Kart Engine Builds
Real torque specs, upgrade compatibility checks, live HP calculators, and step-by-step install guides. Everything you need to build safely and confidently.
How It Works
Choose Engine
Select your base engine from Predator 212 variants, 420, or 670. See real torque specs and compatibility data.
Pick Upgrades
Add performance parts with live compatibility checks. See HP gains, RPM limits, and safety warnings in real-time.
See Results
Get estimated HP range, safe RPM limits, required tools, torque specs, and step-by-step install guides.
Ignition Timing Calculator
Calculate optimal timing for your build with our interactive calculator.
Try Calculator →Popular Engines
Predator 212 Ghost
The Predator 212 Ghost is a high-performance variant with increased RPM capability.
Stock HP
6.75 HP
Stock RPM
4000 RPM
Predator 212 Hemi
The Predator 212 Hemi is a popular 6.5 HP engine with a hemi-style combustion chamber for better performance.
Stock HP
6.5 HP
Stock RPM
3600 RPM
Predator 420
The Predator 420 is a 13 HP engine with more displacement for higher torque.
Stock HP
13-13 HP
Stock RPM
3600 RPM
Tools & Calculators
Torque Specs
View complete torque specifications for all engine fasteners, organized by category.
View Specs →Build Planner
Plan your complete build with live HP calculations, compatibility checks, and cost estimates.
Start Planning →Ignition Timing Calculator
Calculate optimal ignition timing with advanced timing keys. See HP impact and safety warnings.
Try Calculator →Example Builds
Featured Videos
Browse All Videos →Useful Videos
Predator 420 - Maintenance Schedule
GoPowerSports
Predator 420 - Performance Testing
GoPowerSports
Predator 420 - Engine Troubleshooting
GoPowerSports
Predator 420 - Electrical System Wiring
GoPowerSports
Featured Products
Create a Free Account
Save Up to 10 Builds
Save and compare multiple builds. Access them anytime, anywhere.
Track Tools & Torque Specs
Keep track of required tools and torque specifications for your builds.
Bookmark Videos
Save helpful installation and tuning videos for quick reference.