Sorry Gary I don't know but I saw a 2.8 litre Isuzu turbo on eBay that had been marinised (claimed 140BHP). The seller who had used it in a 23...
Wiseman of Stuttgart used to marinise these. He mated them to Borg Warner Vee drives so its all been done before. The power output of about...
Regarding the Dowty Turbocraft boats the English model was the small one and had a Zephyr 6 (straight 6) of 2553 cc. The automobile version was...