1012cc Imp engine
This engine was built by Andy Jones Shrigley Engineering Ltd.
R20 Cam
Wet liner 73mm bore over bored 998
Sport head 1.3 and 1.125 exhaust port
Steel followers Double valve springs
11.1 to 1 compression
Twin 40 webbers 30mm choke
45 F9 Slow running jets
120 main jet ??, F16 emulsion tube, 175 air correction jet
65flb at 3800 RPM
73ftlp at 5000 then falls off going lean at 7000
Some of the videos are extracts from Shrigley TV click here to go there and see more.
Head and block prior to assembly
