Quote:
Originally Posted by blykins
A stock K code 289 was rated for peak horsepower at 6000 rpm. Why shift at 7000? .........."
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My exact post was "....The engine is an essentially stock 289 Hi-Po K code..."
It's not EXACTLY stock, but essentially stock. I should have posted the differences. It does breathe a bit better, and I suppose that is why it is still pulling strong to 7000+ rpm. I had it dynoed years ago, but don't recall the exact peak numbers. I do remember that the operator was wanting me to OK a higher testing rpm than the 6,800 I had authorized, as the engine had not dropped off in power yet at that level.
I have slightly bigger valves, a mild head porting job, Crane Cams gold series aluminum roller rocker arms, a 2.5" MagnaFlo stainless steel exhaust system, a msd digital 6 ignition, a high volume Melling
oil pump w/ a Melling
oil pump shaft, and a vintage Paxton supercharger.
The intake & headers are the Shelby supplied items (Cobra lettered hi-rise intake & tri-y headers). The bottom end is stock.
Z.