defiantly lifter problem with combination with cam and rockers. t&d rockers oil out 2 holes one for valve lube and one for pushrod, and lifters hole pushrod oiling two. the cam has groove so constant pressure to rockers. so 3 holes at 2.5mm on each rocker x 16 thats 48 holes leaking at full pressure. going to change to comp 828 lifters & restrict rockershfts. should be fixed.