|
To commemorate 25 000 Lotus twin cams having been built by 1970 Lotus presented Walter Hayes of Ford with the 25 000th engine. Accordingly, MN (15-10-70) did an article on the engine. Relevant quotes from it include: "Owing to production difficulties Colin Chapman asked BRM if they would continue development on the racing version of the twin-cam for 1965, so Tony Rudd's team set to ... Bourne's dry-sumped products produced some 155-160 bhp and equipped with fuel-injection (as they were in the works cars) they found as much as 185 bhp." Another quote refers to the Elan-BRM marketed by Mike Spence: "Through BRM's involvement with the preparation with the racing twin-cam came a subsequent arrangement with Mike Spence at Maidenhead to market special Elans with BRM modified motors. The power units were sent to Bourne and completely dismantled and then rebuilt with different inlent valves, Cosworth CPL2 camshafts and ten thou and 20 thou respectively came off the head and block. The object was to increase the power of the LF/105 motor by about 20 per cent without any loss in flexibility or smoothness."
An advert by BRM referred to Twin Cam tuning from £485 - Stage 1 135 bhp, Stage 2 155 bhp, Stage 3 175 bhp and Stage 4 180 bhp plus.
|