Camshaft gears / sprockets and fixings

944 2-in-1 Performance Cam Wheel (+2° / +4°)

Unlock additional performance from your Porsche 944 engine with this innovative 2-in-1 Performance Cam Wheel, engineered to optimise camshaft timing and deliver measurable improvements in both torque and horsepower. Featuring two pre-set timing advance positions (+2° and +4°) within a single camshaft sprocket, this clever design allows owners to tailor engine characteristics for either road or track use without the complexity or expense of a fully adjustable cam gear.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988

By simply rotating the cam wheel 180 degrees during installation, you can select either the +2° or +4° timing position, making this a cost-effective performance upgrade that offers greater flexibility than a standard replacement camshaft wheel.

Even better, the price is lower than many genuine replacement camshaft sprockets while delivering real-world performance gains proven on the rolling road.

Why Adjust Camshaft Timing?

The camshaft and crankshaft work together through the timing belt to control valve opening and closing events. While Porsche factory timing settings provide a good balance for production vehicles, they are often no longer optimal after years of service or engine rebuilding.

Several factors can alter the original camshaft timing:

Cylinder Head Resurfacing

During engine rebuilds, cylinder heads are often skimmed to restore flatness. Many Porsche 944 engines have had this procedure performed multiple times throughout their lives.

Each resurfacing operation slightly alters the relationship between the crankshaft and camshaft, affecting valve timing and engine efficiency.

Hydraulic Tappet Wear

Over time, natural wear and operational changes within the hydraulic tappets can influence valve timing characteristics, reducing engine responsiveness and performance.

Manufacturing Tolerances

Even when new, production tolerances can result in small variations in camshaft timing from engine to engine.

This performance cam wheel compensates for these variables by subtly repositioning the camshaft relative to the crankshaft, advancing intake valve opening events to improve cylinder filling and increase engine output.

Dyno-Proven Performance Gains

Extensive rolling road testing has demonstrated clear performance improvements over the original factory camshaft timing.

+4° Setting

The +4° position provides the greatest torque increase in the lower and mid-range rev band.

Benefits include:

• Up to 10 Nm increase in torque
• Improved acceleration
• Stronger mid-range response
• Enhanced road driving characteristics
• Improved flexibility during everyday driving

Peak gains are achieved up to approximately 5000 RPM.

+2° Setting

The +2° position also produces a significant torque increase but is optimised for higher engine speeds.

Benefits include:

• Improved upper RPM performance
• Increased peak horsepower
• Strong high-rev power delivery
• Enhanced track performance
• Improved top-end engine response

Above approximately 5000 RPM, the +2° setting delivers the strongest horsepower gains.

Which Setting Should You Choose?

+4° Position – Ideal for Road Cars

The +4° setting is recommended for:

• Fast road use
• Daily driving
• Touring
• Improved drivability
• Enhanced low and mid-range torque

This setting delivers a more responsive engine where it is used most often on the road.

+2° Position – Ideal for Track Use

The +2° setting is recommended for:

• Motorsport applications
• Track days Competition use
• High RPM operation
• Maximum peak horsepower

Drivers seeking ultimate top-end performance will benefit most from this configuration.

Simple Installation

Unlike many performance camshaft timing solutions, this cam wheel retains the original timing reference marks on both sides.

This allows:

• Straightforward installation
• Accurate timing belt alignment
• Easy selection of either timing position
• Factory-style installation procedures

The wheel is designed to fit directly in place of the original component.

Corrosion-Resistant Construction

Manufactured from steel and galvanised for corrosion protection, the cam wheel is built for long-term reliability and durability.

The kit also includes a new locating wedge to ensure accurate positioning and installation.

Package Contents

Supplied complete with:

• 1 x Galvanised Steel Performance Cam Wheel
• 1 x New Camshaft Locating Wedge

Installation Information

Approximate installation time: 1 hour Timing belt removal required Timing belt re-tensioning required after installation Ideal upgrade when replacing the timing belt Suitable to combine with routine maintenance work

Professional installation is recommended if you are unfamiliar with Porsche timing belt procedures.

Adjustable Camshaft Sprocket - Precision Cam Timing Adjustment for Performance and Reliability

This adjustable camshaft sprocket is designed for Porsche 924S, 944 2.5 8V and 944 Turbo models. It allows precise adjustment of camshaft timing to optimise torque delivery, correct timing deviation after engine work and enhance overall driving characteristics.

Fits:

• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988

Engineered as a direct replacement for the original cam pulley, it installs easily and includes a new key and camshaft bolt for safe assembly.

What an Adjustable Camshaft Sprocket Does

The camshaft sprocket controls the timing relationship between the crankshaft and camshaft. By adjusting cam timing, you influence when the valves open and close relative to piston position.

This affects:

• Torque delivery
• Throttle response
• Powerband characteristics
• Maximum horsepower
• Engine drivability

By advancing or retarding the camshaft timing, you can shift the torque band higher or lower in the RPM range depending on your intended use.

Adjustability Range and Features

• Adjustable from -4° to +5° camshaft timing
• Degree markings for accurate setting
• Original zero position retained +3° to +4° is typically ideal for most street setups
• Maximum adjustment range prevents valve-to-piston contact
• Adjustment possible while mounted on the camshaft
• No need to modify the distribution cover
• Safe to tune without a rolling road

The designed adjustment range ensures you cannot rotate the sprocket far enough to cause engine damage under normal use.

Why You May Want to Upgrade

Correct Timing After Head Work

Many Porsche 924S and 944 engines have had cylinder heads skimmed during overhaul. When material is removed, the head sits lower, slightly retarding cam timing. This adjustable sprocket allows you to correct timing precisely and restore factory performance.

Compensate for Manufacturing Variations

Even factory sprockets can vary slightly in keyway positioning. This gear allows fine correction for accurate timing alignment.

Performance Tuning

If you are running:

• A performance camshaft
• Engine modifications
• Increased boost on a Turbo
• Higher compression setup

An adjustable camshaft sprocket becomes essential for optimising performance.

Street vs Racing Setup

For street use:
Advancing the cam (+3° to +4°) increases torque in the 2000 to 3500 RPM range, improving daily drivability and throttle response.

For racing use:
Retarding or advancing timing toward +5° can move peak torque higher in the RPM range for greater top-end performance.

You can safely experiment and feel the difference without needing a dyno session.

Superior Construction and Durability

This sprocket uses the original toothed outer design to maintain correct belt engagement but improves the internal core strength.

Key upgrades include:

• High-quality steel core stronger than original
• Reinforced keyway to prevent tearing under load
• TriPass Yellow Special galvanised coating for corrosion resistance
• Four high-strength 10.9 M8 Allen bolts for secure clamping
• Cleanly centred for smooth rotation

The original sprocket’s common weak point was the keyway, which could fail under poor assembly or high stress. This upgraded version significantly improves durability.

Package Contents

• Adjustable camshaft sprocket
• New original key
• New camshaft bolt
• User manual (in Dutch)

Reusing old keys or bolts can lead to failure, which is why new components are supplied.

Key Benefits at a Glance

• Adjustable cam timing from -4° to +5° Safe adjustment range prevents valve damage
• Ideal after cylinder head machining Improves torque and drivability
• Suitable for street and racing use
• Stronger core and reinforced keyway
• Corrosion-resistant finish
• Direct replacement with easy assembly       

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Fits:
Porsche 356B / 356C - 1960 to 1965
Porsche 911 - 1978 to 1989
Porsche 924S - 1986 to 1988
Porsche 944 - 1985 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995