Valve train clatter.
Here is my combo: 1776 cc motor with 40x35.5mm 042 heads, single hi-rev springs, Scat lifters, Engle W-110 grind cam, .430 valve lift, 284-degree duration; intake opens 19, exhaust closes 12; intake closes 48, exhaust opens 55; gross cam lift 397, duration @ .050 247, lobe centers 108, lash .004, Autocraft solid shafts with swivels.
Is it normal to have a significant clatter with this setup? This is a strong running engine, that also uses dual Dellorto carbs. Other components inclde: Brazilian case, Demello c/w crank. I heard the issue occurs with some cams and lifters.
Philip Citek Los Osos, CA
Cam grinds can have a little to do with valvetrain noise, but the biq piece of information you didn’t supply is your pushrod type and material.…
