I read sumwhere that when you climb up in the rev range of 6000rpm and beyond the harmonics that occur in the valve train can cause those triple grooves in the vlave stem to fail wheras singles dont suffer as bad if at all. Plus going away from stock collet angle locks everything together just that bit more.
And one other thing that Ive found is to make sure the collets and retainers are bone dry when they go together. I relate that to B-series Cummins P-pump camshaft taper and gear. They use no key just a friction fit on the taper. If they are oily when they go together the chance of the gear slipping goes way up even tho the nut is torqued up to over 100ft lbs. So I just Brakleen the valve collets n retainers and dont use grease on a screwdriver to put the collets in like a lot of people and engine shops do, just use a magnet.
@@matui6983 right on M69 sounds right👌🏼 A lot of guys in the days just grabbed the next bigger sized cam & spring package, did a “in car” instal/dial in gained performance & an extra 1000rpm etc…..until them stock triple-groove Valvles & locks cut their fun short 🤷🏻♂️ It’s the most compulsory upgrade to do… 👍🏼🏁
Yep, it happened gb57🤷🏻♂️ & even on the most mild setups also….. My old 2V combos had 7°single groove setups…. & my old na 4V combo & current 10° lock setups👍🏼🏁
@@69JANKS yeah already on it bro! what are your thoughts on mating a used good condition flat tappet cam to new lifters? is this no worries or risky during break in?
@@harmankardon478 👍🏼…, new lifters on a good used cam shld be fine, (just can never use any old lifters on a new cam or other) the LS guys always change out noisy lifters after big Kms use….so🤷🏻♂️! Maybe use an adequate oil also first time up👍🏼🏁
