Re: Horsepower for 69Z 302 w/#140 cam
MCR September '87 did exactly this dyno comparison on a freshly rebuilt 30 over 302. It was professionally built, honed with a torque plate, heads milled to achieve 62cc chambers. Did 327hp/6750 with the stock cam, 347hp/6750 with the 140 cam. The 140 cam showed less power up to 6000 rpm. This was a street rebuild for a restoration.
Photos show the engine on the dyno with open headers, no fan or accessories, unrestricted intake. Your results may vary.
June '88 Hot Rod has dyno results from a 302 Traco built for the '68 Penske T/A cars. Shows just over 400hp/6800. Appears to have been tested with a single carb; cross-ram was good for another 40 hp. States an Engle cam was used.
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10-21-2015, 05:38 PM
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