What Is a Dyno Test? A Beginner’s Guide to Engine Performance by Chad Golen February 22, 2026 0 Key Takeaways: A dyno test provides precise, data-driven measurements of your engine’s horsepower, torque, and key performance parameters—eliminating guesswork and enabling smarter modifications. Professional dyno sessions are essential for safe, reliable tuning, ensuring that custom or upgraded engines run efficiently and deliver consistent power without risking engine damage. Comprehensive dyno testing and tuning, especially for … Read More
Choosing the Right Compression Ratio for Your Jeep 4.0 Stroker by Chad Golen February 21, 2026 0 Key Takeaways: Compression ratio determines torque output and fuel requirements—8.8:1 to 9.6:1 covers most builds from overlanding to performance. Dynamic compression and quench height matter as much as static ratio for preventing detonation on pump gas. Conservative ratios with proper engineering deliver reliable power where premium fuel isn’t always available. The difference between a sluggish … Read More
How the Jeep 4.6 Stroker Transforms Towing Performance vs Stock 4.0 by Chad Golen February 20, 2026 0 Key Takeaways: Upgrading from a stock 4.0L to a 4.6L stroker engine delivers more usable torque in the critical towing RPM range, resulting in fewer downshifts. A properly built 4.6L stroker maintains cooler engine and transmission temperatures under load, improving reliability and extending component life during sustained towing. Professional assembly, dyno break-in, and tuning are … Read More
Jeep 4.0 Block 4.2 Crank Stroker Parts Compatibility: The Complete Guide by Chad Golen February 19, 2026 0 Key Takeaways: Successful 4.0 block/4.2 crank stroker builds require careful matching of rods, pistons, bearings, and professional balancing to achieve reliable, pump-gas-friendly performance. Electronics integration—especially crank position sensor, flywheel, and harmonic balancer compatibility—is critical for seamless operation and trail reliability. Professional machining, dynamic balancing, and precise assembly are essential to prevent premature wear. The Jeep … Read More
Upgrade Your Jeep from a 4.0L to 4.6L Crate Motor by Chad Golen September 9, 2025 0 The 4.0L inline-six engine has long been recognized as one of the most reliable engines on the market. It was the stock engine in most Jeep CJ, Wrangler, and Cherokee models between 1971 and 2006. However, despite its reliability, it was notoriously underpowered. Whether you have an old Jeep that you need an engine for, … Read More
What is an LS Swap and Why is it so Popular? by Chad Golen July 21, 2025 0 In the world of automotive performance and restoration, few phrases generate as much excitement and discussion as “LS swap.” Motor Trend noted in 2020 that “the Chevy LS V-8 engine has become the de facto engine swap suggestion for anyone seeking to add power to their existing platform” due to the engine’s remarkable combination of … Read More
Unleashing Power: Golen Engine’s Premium LSx Short Block Engine Options by Chad Golen July 16, 2025 0 Expert Engine Builders Building LSx Short Block Legends When it comes to building a high-performance engine that delivers exceptional horsepower and torque, the foundation matters more than anything else. Golen Engine Service has established itself as a premier destination for LSx short block engines. We offer a comprehensive range of options that cater to everything … Read More
Inside Look at Golen’s 427 LSx Crate Engine: Boosted to 1000 HP by Chad Golen May 14, 2025 0 Hey everyone, Chad Golen here from Golen Engine Service. I’m excited to give you the full scoop on our 427 LSx Crate Engine that’s boosted—a real beast that pumps out over 1000 horsepower and 900 ft-lbs of torque. We’ve been building high-performance LSx crate engines for over 20 years here in Hudson, New Hampshire, and … Read More
Jeep 4.6 Cooling System by Chad Golen September 29, 2021 0 We have had quite a few customers ask about what keep this engine cool and here is a list of what you will need: Areas of the country where there is not extreme heat Stock Radiator will work in most cases (makes sure yours is in good shape) Stock Clutch Fan Stock 190 Degree Thermostat … Read More
LS1 Vs. LSx Engines: What Is The Difference? by Chad Golen March 19, 2019 0 If you’re shopping for a crate engine to drop in your classic car or street rod, an LS is often an excellent choice. A problem you may face though, thanks to the naming convention used for GM engines, is this: Do you want an LS1 or what engine builders like us refer to as an … Read More