Thread: 289 head help.
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Old 02-25-2005, 02:14 PM
Dan Stryffeler Dan Stryffeler is offline
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Location: Rocky River, Ohio, OH
Cobra Make, Engine: Everett-Morrison, 347 Tri-power Stroker
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What kind of HP/Torque are you looking to make?

My stock heads (with stock valves) make 335HP (not sure right now of the torque, but I believe it was about 350 ft-lbs) at 5200rpm with just a good port job on the intake side. Exhaust ports were left alone.

Over size Chevy valves and a little grinding on the exhaust would make another 20+ I would guess.

If you are going to spin the motor in excess of 5500rpm, would highly recommend larger diameter bolts (ARP) on the rod caps, as this was a weak spot on the 289.

- Dan
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