Jaron Olivecrona competed in the last two seasons of D1NZ in a Nissan S14 with a Toyota 1GZ-FE V12. The naturally aspirated V12 was built by Hartley Engines in Palmerston North, New Zealand and made 700-800 horsepower at 9,500 rpm. Hartley Engines recently debuted their twin-turbo version. The V12 was rebuilt with a lower compression (11.5:1), new camshafts, new exhaust system, and two MSE turbochargers. It made 1,017 horsepower at 9,500 rpm on 11.6 psi of boost before they ran out of fuel supply. Jaron installed the twin-turbo motor in the off-season and is ready to take on the 2020 season.
Source: Olivecrona Drift Motorsport FB page and Hartley Engines FB page
It’s still “V12 Prototype 001”, judging by the footage from The Skid Factory’s NZ Episode, and that “serial number”, that was actually the same engine rebuilt into Twin Turbo spec?
I believe you are correct. Updated to the article to reflect that it is a rebuilt version of the first.