• Automotive Engine
    Performance Products
  • Watercooled VW,
    Audi, Porsche 924
  • Variable Value
    Timing Kits

Franco Industries

614 Santa Alicia, Solana Beach, CA 92075

Ph: (619) 755-4491

e-mail: figf@adnc.com

  • Manufacturing

  • Sales

  • Service

Welcome to Franco Industries. We manufacture and sell automotive performance products. About four years ago, Franco Industries developed a new light weight, compact AUTOMATIC camshaft sprocket. The device is entirely mechanical and operates on the principle of a shaft governor with dynamic fly weights. The camshaft sprocket replaces the factory gear as a bolt on kit. The automatic sprocket increases engine performance by providing 10 degrees of camshaft phase angle change. This broadens the power band and increases performance.

Test data has shown performance gains of up to 25% during 1/4 mile acceleration tests. Road Horsepower Dyno tests show typical gains of 10% to 15% throughout the power band from 2,000 RPM to 6,000 RPM. This dramatically improves acceleration and drivability of the car. This product fits the water cooled 8 valve VW's, the 10 valve Audi's and the Porsche 924 engines.

Operation of the Gear

When the gear is installed on the engine, the camshaft is statically advanced +7 degrees of camshaft timing. This allows the inlet valves to open earlier in the cycle to fill the cylinders more efficiently when the mixture velocities are slower. At approximately 3,500 RPM, the gear begins to retard the camshaft automatically as a function of engine RPM. At approximately 4,000 RPM, the gear reaches full retard and the camshaft is retarded to -3 degrees of camshaft timing. This helps to scavenge exhaust gasses through the exhaust valves which adds more top end power.

The automatic camshaft gear operates on the principle of two dynamic fly weights that advance and retard the camshaft automatically with engine RPM. The fly weights are held in equilibrium by return springs. The spring rates and preloads are selected to cause the device to shift at MID SPAN of the engine RPM range.

The automatic sprocket is relatively simple. It consists of: a gear housing, drive plate, two fly weights pivoted on needle bearings, two slider bushings and two equilibrium springs. There are four moving parts in the unit.

The cost of the product is $300 plus shipping. This includes a six month warranty on parts and labor.


Product Literature

European Car Magazine Articles

Automatic gear installed on camshaft (picture)

Internal fly weights and equilibrium springs (picture 1)

Internal fly weights and equilibrium springs (picture 2)

Parts Overview (picture)

Automatic gear sales literature

Canadian Fahrveg News Article

Performance Tests

'88 Audi Model 90

'87 VW Golf GTI

'87 VW Jetta

'84 VW Rabbit GTI


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Accesses Since January 25, 1997

Last Modified January 25, 1997