Quote:
Originally Posted by xb-60
Kurt,
Yes I’ve read a few old tests where rev limits of 7000 or even higher were mentioned for 289s. These were probably accompanied by grumpiness at lower revs, but that being almost 50 years ago,........."
Glen
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I routinely shift at 6,500 to 7,000 rpm. The engine is an essentially stock 289 Hi-Po K code. It is a flat tappet engine, with a stock Hi-Po cam. There is no grumpiness at any rpm, idles fine at 900 and is smooth to 7,000+ rpm. In a nine year time span I've got over 45,000 miles on the engine. Seems very durable to me. With good lubrication, meaning an
oil with plenty of
zinc, there are no issues with cam or lifter wear. Been using Mobil 1 15w-50 the entire 9 years.
Z.