Andrews EV59 Cam Specs and Performance Evaluation

Understanding the exact nature of the andrews ev59 powerband is vital before undertaking any serious harley evo cam upgrade. Andrews engineers specifically tailored this profile with an intake opening angle of 28 degrees and a closing angle of 48 degrees, resulting in an intake duration of 256 degrees measured at .053 lift and 290 degrees at .020 lift. In the realm of four-stroke Evolution engineering, extending intake duration and delaying the intake closing event allows high-velocity incoming air and fuel charges to continue filling the cylinder chambers even as the piston sweeps upward on its compression stroke. This dynamic fills cylinders efficiently at elevated speeds, producing a dramatic surge in horsepower that pulls hard past 3,000 RPM and stretches in a wide arc all the way to 6,000 RPM.

Because the timing events are dialed for high engine speeds, this camshaft shifts the motor’s operating efficiency higher up the rev counter. In modified 80 to 88 cubic inch powerplants with enhanced carburetion and free-flowing exhaust systems, the profile breathes effortlessly where standard factory camshafts choke off and run flat. Riders who frequently take extended trips across long stretches of interstate highway will appreciate the immediate throttle response when accelerating from 70 mph to triple-digit passing speeds. However, the trade-off of delayed intake closing is a noticeable loss of low-rpm dynamic compression, meaning engine response below 2,800 RPM will feel softer than a factory setup.

For motorcyclists who evaluate the andrews ev59 cam review consensus, the performance reward clearly lies in mid-range and top-end punch. The listing verifies that these hydraulic lifter cams are capable of 6,000-plus RPM operation without inducing valve float, provided the supporting components are selected correctly. This high-rev capability provides touring motorcycles the stamina needed to climb steep mountain passes two-up without running out of breath, granting modified Evolution engines the convincing upper-register power modern touring riders demand.

Careful review of the published andrews ev59 cam specs reveals that proper installation requires immediate valvetrain upgrades rather than relying on factory equipment. The manufacturer documentation explicitly dictates that this profile is intended for use with high-lift springs and collars. While the provided listing cuts off the final total valve lift figure under the technical table, stating merely Valve L, the extended 290-degree total duration at .020 lift mandates that stock Evolution springs be replaced to avoid coil bind or retainer-to-guide contact during maximum valve travel.

Selecting dedicated andrews ev59 valve springs and matching collars ensures that the valvetrain maintains required seat and open pressures across prolonged high-speed operation. Factory springs in 1984 to 1999 Big Twin Evolution engines are generally engineered around modest stock valve travel and lower operating ceilings. Attempting to run a radical aftermarket grind without upgrading to matching high-lift hardware introduces severe risks of retainer interference, premature guide wear, or destructive valve float when winding the motor toward its 6,000-plus RPM ceiling.

Beyond valve springs, builders must account for pushrod geometry, rocker arm clearances, and hydraulic tappet health during assembly. The listing notes that the EV59 is an alloy steel billet hydraulic lifter cam designed to achieve stable operation at high RPM without valve float. For the long-distance tourer packing miles across multiple states, assembling the valvetrain to exact manufacturer guidelines ensures that the mechanical components operate in complete harmony without excessive noise, excessive heat accumulation, or unexpected mechanical failures far from home.

Executing an engine rebuild with the andrews 291159 cam requires meticulous attention to mechanical clearances inside the gearcase. The product listing highlights an indispensable mechanical advisory: measurement of cam and pinion gears is especially critical for 1990 and later models to verify proper fit. Starting in the 1990 model year, Harley-Davidson altered pitch diameters and tolerances within the nosecone gear assembly, meaning engine builders cannot simply drop in a replacement gear without verifying lash against the existing pinion gear.

If gear lash is too tight, the gearcase will produce an intrusive, high-pitched mechanical whine that generates unnecessary frictional heat and accelerates wear on the cam bushing and needle bearings. Conversely, excessive gear lash causes distinct gear rattle and clicking at idle speeds that can damage the gear teeth over time. To ensure optimal mechanical longevity when installing an andrews ev59 cam for harley evo engines, builders must measure gear pitch diameters and use properly color-coded or precisely matched gears as outlined in factory and Andrews service manuals.

Physical construction is another reassuring aspect of the unit’s mechanical integrity. Weighing in at 2.1 pounds and measuring 3.3 x 3.4 x 7.8 inches, the camshaft arrives with a painted exterior coating on non-bearing surfaces to stave off surface oxidation prior to assembly. Andrews utilizes premium alloy steel billets combined with dedicated heat-treating processes, ensuring the lobe surfaces resist galling and pitting under high spring pressures. Furthermore, this component is made in the USA and sold individually, fitting all 1984 through 1999 Evolution Big Twin platforms while excluding 1999 Twin Cam engines.

When embarking on cross-country motorcycle journeys, riders often ponder: is andrews ev59 worth it from a touring and reliability standpoint? The answer hinges directly on riding habits, luggage loads, and engine setup. Vintage riders familiar with early factory cam codes like the standard y cam evo profile recognize that stock camshafts favored low-rpm emissions compliance and bottom-end torque over broad breathing capability. Upgrading to a performance profile like the EV59 fundamentally alters the motorcycle’s touring character, providing effortless passing power against highway head winds when cruising between 75 and 85 mph.

Because long-distance motorcycle travel involves long hours in remote regions, reliability is paramount. The computer-aided design capabilities utilized by Andrews Products deliver smooth, gradual valve acceleration ramps that reduce jarring impacts across lifter rollers and valve seats. While you are away touring on open asphalt, keeping your home shop and motorcycle storage area monitored with high-resolution gear like the wyze solar cam pan 2k outdoor camera provides absolute peace of mind regarding valuable tools and vintage bike parts left behind.

Ultimately, long-distance touring on an EV59-equipped Evolution motorcycle is exceptionally rewarding if your bike features displacement between 80 and 88 cubic inches, corrected compression ratios, and appropriate primary gearing. The camshaft’s ability to maintain high cylinder pressure and rapid exhaust evacuation at 3,500 to 5,500 RPM keeps the motorcycle surging forward on long, uphill freeway grades without requiring the rider to constantly downshift through the gearbox.