CMS A-Series Fast Road Camshaft (Profile similar to Kent 286)
Precision In-House Engineering for the BMC A-Series Engine
At Classic Machine Shop CMS, we do not believe in compromise. The legendary British Leyland A-Series engine demands flawless valvetrain geometry, which is why our high-performance camshafts are precision-ground in-house at our UK facility using dedicated master profiles.
Precision ground, performance camshaft from Classic Machine Shop, Engineering for BMC A Series Engines. This profile is ground to match the high-performance rally characteristics of the classic 286 specification, powerband from 2000 to 7500 rpm powerband
Technical Specifications:
CMS Profile Designation: CMS K286
Profile Geometry: Ground to classic 286 specifications
Target Application: Rally / Top End Power
Estimated Valve Lift 1.3 to 1 Rockers: 0.378 inches
Supply Type: Precision Exchange Re-grind. High-lift race profiles are available on brand new blanks by request.
Power Band: 2000 - 7500 RPM
Full Lift (Inlet): 106 deg ATDCThe CMS Core Exchange Service
This profile is precision-ground onto an original, inspected factory A-Series core. To purchase this camshaft, you can either:
First Option: Ship your original, clean A-Series camshaft to our workshop. Once it passes our strict structural integrity and gear wear inspection, we will dispatch your new CMS performance cam.
Second Option: Pay an upfront core surcharge at checkout. We will ship your CMS camshaft immediately, and refund the deposit in full once your usable exchange core arrives at our shop and passes inspection.Installation & Break-In Requirements
To ensure the longevity of your flat-tappet A-Series valvetrain, CMS requires the following installation steps. Failure to follow these steps will void the product warranty:
Mandatory New Followers: Never install a new or reground camshaft with used lifters. You must use brand-new, high-quality flat-tappet followers.
Check Valvetrain Geometry: Because this is a high-velocity regrind with a slightly reduced base circle, you must check rocker arm geometry. Ensure adjustment screws have proper thread engagement. Rocker pedestal shims may be required to restore a perfect 90-degree alignment.
Break-In Procedure: Coat all lobes and follower faces heavily with high-zinc ZDDP assembly paste. Upon initial startup, do not idle the engine. Run the engine immediately at 2000 to 2500 RPM for 20 minutes to work-harden the new lobe surfaces.Trademark Disclaimer
Classic Machine Shop CMS is an independent manufacturer of precision-ground engine components. Any reference to original manufacturer names, profile designations, or original part numbers is strictly for informational and comparative purposes to describe the physical geometric dimensions of the lobe profile. Classic Machine Shop has no official affiliation with these trademark holders.
