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Formhalls Vintage & Racing Ltd

The number and combinations of possible improvements for racing is determined by the basic design of the engine. In particular, the original combustion chamber design has a vital influence on the engines potential. Also, the stroke and the strength of the bottom end will influence the engines characteristics and reliability and may be the limiting factor regarding the maximum torque / power that can be safely extracted from your engine.

Below are a few common improvements that will encourage additional revs. Racing improvements are recommended in addition to the essential, advisable and some of the optional specifications listed at these pages

Diaphragm  spring clutch conversion & Lightening

Left - A diaphragm spring clutch gives many advantages, especially when delivering additional torque. Right - Close up of the same clutch showing flywheel lightened by removing starter ring gear and reducing outside diameter

Gas flowing - Compression adjustment - Combustion balancing

Polished and balanced combustion chambers 

Supercharging

Valve timing

When considered with other factors such as compression ratio, lightening and balance, valve timing and lift can make a huge difference to your engine. It can improve breathing at speed (volumetric efficiency) and can literally change the whole characteristics of your engine. However, by itself racing timing will be worse than useless and must be developed as part of an overall tuning strategy to ensure the rest of the engine can cope

Baffle plates

To limit oil surge when cornering, accelerating and braking hard

Strengthening

Above - The underside of a 2 mains Singer block - Through studding has been used to protect the Singers relatively week top deck against a  racing compression ratio

etc. etc.

Please contact us for further advice

             To contact us: Phone 01725 511684    

                                    Fax 01725 511684     

Email: Enquiries@formhalls.com 

Formhalls Vintage & Racing Ltd. Greycott, Lower Densome Wood, Woodgreen, 

New Forest, Hampshire, SP6 2BE England

(Callers by appointment only please)

   _{Practicing Preserving and Passing on British Tradition}