CPR offers full Engine Rebuilding Services ranging from Mild Internal Upgrades to Full Bespoke Race Engines, and with over 25 years collective experience building engines used in Motorsport application, we pride ourselves in offering the highest level of quality and attention to detail in all of our Engine Building Services.

We specialise in Import and German High Performance Engine Builds, please select your engine below for examples of upgrades we can carry out;

 

The engine building process starts with a strip down!

Engine Stripping is an important process, often overlooked by many inexperienced Builders. Extremely subtle irregularities, damage or imperfections must be closely studied for, to avoid engine failure at a later date. Previous failures on Engines must be carefully diagnosed (and rectified) where a multitude of imperfections can re-occur if not identified at this stage.

Every component that is to be re-used is examined, compared to the manufacturer's tolerances and tested where available, prior to thorough cleaning via our parts cleaner.
Typically our engine builders will spend a full day ensuring every component is checked and cleaned meticulously. We believe that Preparation is one of the most important stages, and should never be rushed.

Bottom-End Rotating Assemblies can be Dynamically Balanced in high hp/rpm applications. The balancing procedure is a lengthy process, but ensures maximum reliability and reduced inefficiency of the engine. The entire rotating bottom end (normally comprising of Clutch Cover, Flywheel, crankshaft, Front Pulley's/Belt Gears and all bolts) is expertly balanced up to 13,000 rpm.

Cylinder Block Boring is performed by our local Machinists, that we have worked with for over 10 years, having developed the most ideal procedure for ensuring a perfect cylinder bore and hone is achieved.

Unlike the majority of other engine builders, we use our Bore Plates on blocks requiring a rebore. The Bore plate is used to simulate the attachment of the Cylinder Head. When a block is has a cylinder head attached and torqued down, it will change shape considerably. To bore a block without a Bore Plate attached and torque to specification, it will mean the bores will never be truly parallel, which will result in engine inefficiency, excessive wear, or increased oil consumption. Our Bore Plate ensures our Bores are parallel and true to how they should be when the Cylinder Head is re-attached. Our experience in building engines allows us to ensure the correct finish is left on the Cylinder Walls. Having built up a solid relationship with CP Pistons over the years, we have ensured the correct finish is applied to ensure correct ring bedding-in, and final sealing. Our machinist has worked with us, to ensure the exact grade of abrasives are used, and replaced regularly to ensure excellent repeatability.

Further specialist machining is sometimes required in some race applications, when using stroker crankshafts, where clearancing is required. This is performed by CNC, to industry leading quality. Many processes are carried out during this phase, most of which are closely guarded by our engine builders, where our trade secrets allow the highest level of quality and durability is passed onto our customers.

Using a Reni-Shaw Machine we are also able to map/plot any engine block surface, which is fed into computer software, allowing very precise (0.00001") measurements to be made, pre and post machining.

After final Decking and Honing, all blocks are re-measured and examined by ourselves to meet our Quality Control Requirements.

All Engine Assembly is performed in a clean, clutter-free room devoted to Engine Builds.

We prefer to use Genuine O.E Parts unless we are uprating, where zero compromise to longevity or quality is permitted. Where aftermarket items are used (i.e. Metal Multi-Layer Headgaskets), we will have always tested these components in a racing environment.

Uprated Bolt & Fastener Hardware is often used in our high performance builds, particularly for the Cylinder Head Bolt, where we will either offer an ARP Fastener or our our range of Uprated Full Competition Fasteners for the most highly demanding conditions (e.g. our 13mm Head Stud in L19 Material that we use on our Time Attack Evo's supporting close to 1000bhp and 3.5bar boost pressure!)

Every step of the engine build is performed to the manufacturer's tolerances and specifications, and our Quality Control Procedure ensures that no area of the build goes overlooked/unchecked.

Cylinder Head, Camshafts and Valvetrain.

The entire top-end assembly is performed to the same attention to detail and quality as the Bottom End, where all re-used components such as retainers, valve springs, rockers, valves etc are examined and compared to manufacturer's tolerances. The majority of valvetrain builds will involve upgrading valvetrain components to ensure maximum reliability, where we will typically introduce an uprated aftermarket Single or Dual Valve Spring, Seal and Retainer Kit.

Cylinder Head Modification Services are available at CPR, where any Port Re-Shaping or Oversizing of the Valves is carried out by an Industry Leading Race Cylinder Head Specialist that we have worked with for over 10 years. Our specialist has over 30 years experience working on and developing Cylinder Heads for Racing Application, and with the support and use of CAE/CNC Equipment, we can offer the high quality level of Cylinder Head Processing, reserved to customers seeking the absolute highest level of quality and performance from their engine.

CPR matches experience with technology, and our engine building program surpasses all expectations.

Need an engine building? Contact us today to discuss your needs, let us spec your perfect powerplant.