In reply to # 1593370 by Jeff Clunn Would a different size pulley cause this? not spinning fast enough initially at idleIt could. But it would be in proportion to pulley size. So if, for example, a 2" pulley lets it "pull in" at 800 engine rpm; an 8" pulley wouldn't pull in until 3200 rpm.
56 TR3 TS13571L Once and future daily driver
71 Stag LE1473L awaiting engine rebuild
7? Stag awaiting gearbox rebuild