per "914 Technical Specs" book Porsche #4222.21 1st edn, May 1,1974
"valve timing with 1mm valve clearance
I opens 12 BTDC
I closes 42 ATDC
E opens 43 BBDC
E closes 4 ATDC"
you should be able to calculate duration from that
QUOTE(adidas @ Dec 17 2016, 09:16 AM)
Does anyone know the duration and lift specs on the camshaft on a stock 2.0 engine?