High Energy 215/224 Hydraulic Roller Cam
Built for Real Street Power. Tuned for Low-End Authority and Everyday Driveability.
When you’re waking up a 4.0L OHV, you don’t need a wild cam — you need a smart one. A cam that sharpens throttle response, strengthens low‑end torque, and keeps the truck civilized enough to daily. COMP Cams’ High Energy 256HR Hydraulic Roller Cam does exactly that. It’s a proven grind engineered specifically for the Ford 4.0L OHV platform, giving Explorers and Rangers the kind of controlled, predictable torque curve the factory never delivered.
This cam isn’t about chasing peak horsepower. It’s about making the 4.0L feel stronger everywhere you actually drive — from idle to mid‑range — without sacrificing reliability or manners.
Designed for Street‑Driven SBC Builds
The 256HR grind is tailored for mild street/utility builds running hydraulic roller lifters. It improves low‑speed torque, enhances throttle response, and maintains excellent vacuum for power brakes and factory accessories. Perfect for daily drivers, work trucks, trail rigs, and weekend builds that need real‑world performance instead of high‑RPM theatrics.
And for off‑road or overlanding builds, this cam is the better choice. The 256HR delivers stronger low‑end torque than the 215/224 cam, giving you cleaner crawl control, better throttle modulation, and more usable power below 3,000 RPM — exactly where the 4.0L spends its life on dirt.
Optimized Duration & Lift
COMP’s High Energy series uses efficient lobe profiles that keep the engine responsive across the entire usable RPM range. The 256/266 advertised duration and 200/210 @ .050 split help cylinder fill without pushing the engine into a high‑RPM dependency. Lift values of .465/.500 work perfectly with stock heads, stock springs (in most cases), and typical street compression ratios.
This cam is engineered to work with the 4.0L’s airflow characteristics — not fight them.
Clean Idle. Strong Mid‑Range. Real Power.
Expect a clean, near‑stock idle with a noticeable improvement in off‑idle torque. As RPM climbs, the cam transitions into a stronger mid‑range that makes the truck feel more responsive, more confident, and more willing to move. It’s the kind of upgrade that makes a 4.0L feel less burdened and more eager.
Compatibility & Requirements
Works with hydraulic roller lifters
Designed for 1990–2001 Ford 4.0L OHV engines
Compatible with stock heads and mild aftermarket springs
Maintains vacuum for power brakes and factory accessories
Supports factory fuel systems and common compression ratios
Requires proper pushrod length verification during installation
Ideal for street, utility, and trail use
This grind is intentionally forgiving — it doesn’t demand exotic parts or high compression to perform. It simply works.
The 12° North Takeaway
A camshaft sets the tone for the entire build — especially on the 4.0L OHV. The COMP Cams High Energy 256HR gives your engine the kind of low‑end authority and mid‑range pull that makes the truck feel right. No drama. No compromises. Just a smart, proven grind that elevates the entire driving experience.
If you’re building a street‑driven 4.0L OHV — or an off‑road/overlanding rig that needs torque down low — this is the cam that brings the engine to life.
Recommended Springs for this camshaft application can be found [Here]
Hydraulic Roller: Excellent in Explorers and Rangers with aftermarket chip/tune. Strong torque and mid‑range for daily and trail use.
