The Holden Grey motor is often referred to as the Holden side plate. The engine earned its name as they were painted grey from the factory. They came in 2 sizes, 138ci and 132ci. More engineering and after market modifications have gone into this engine than any other engine in Australian automotive history.

October 17, 2017

Rescuing, building, collecting & compiling the history of the GREY MOTOR HOLDEN ENGINE 1948-1962

20:24 Posted by Unknown No comments

Rescuing, building, collecting & compiling the history of the GREY MOTOR HOLDEN ENGINE 1948-1962

Having a passion for the Holden Grey Motors, I am endeavouring to acquire any parts, memorabilia, information, documentation and photographs for a display of engines and to compile a book on subject.

The Grey Motor was originally developed for the automotive industry but was adapted for use in industrial applications including forklifts, compressors, welders, concrete agitators and marine - to name a few.

Any assistance you can supply in my endeavour to save the history of this engine, would be greatly appreciated.

Please cantact: BOB LEWIS P 1 02 9826 1709 m I 0414 621 947  

• Standard 6 volt 48/215
• Single Cylinder Olds Marine
• Triple Carbys & Extractor
• Repco Highpower
• Dunstan Rotary Valve
• 12 Port Vauxhall Headed Holden
• Twin Cam Waggott
• Twin Cam Foster
• Dodge Crank Up to 1" Stroke
• Vauxhall Crank
• V12 Wallbank with 2 High Power Heads 


May 28, 2017

Repco Crossflow on the racetrack

18:32 Posted by Unknown No comments
Repco Crossflow on the Dyno

That motor has an experimental cam which was no good producing around 200 hp at the flywheel. The previous engine had 225. Max power on this engine flat past 6,300. The previous one had max power at about 6,800. Hence the change point around 6000 in this race. Previous engine change point 6500 




At the Track:

April 18, 2017