Excellent thread - we have not had a good engine build thread in a long time. This will put you in the sweet spot of engine power/torque for a road-focused seven that does the occasional track day. Any more and you lose your license the moment you wind out second gear.
Shane - Not sure you want to sleeve a Duratec block - they are pretty thin walled to start with. Sleeving works well on the older engines with a ton of excess metal and less fine tolerances. Fortunately, they are cheap to buy.
John - You should link the CSR260 engine build manual to this thread or attach it (preferably). Lots of good information in there that I had forgotten about. Pity all those nice photo icons are so small.
Mike
2021 Caterham CSR "CatKong"
2010 Caterham CSR with Cosworth 2.3 Duratec
2018 Caterham 420R with 2L Duratec 210hp at Donington UK
1972 Lamborghini Espada GT
1975 BMW CSL Group 4 (restoration finished - track set up time)
1977 Holden Torana "A9X" (awaiting restoration)
1985 Holden Commodore SS Group A (suspension restoration)
1985 Holden Commodore Group A (suspension set up)
1982 Ferrari 400i (radiator replacement)
1965 Ford Mustang Fastback "Holman Moody"
1992 Ford Escort RS Cosworth WRC (dyno time)
1990 Range Rover 2 door Classic