06-28-2014, 04:53 AM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,533
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Quote:
Originally Posted by blykins
I dyno'd a 428CJ yesterday with factory heads and intake. Only real upgrade as far as performance was a hydraulic roller cam, along with a better valve job with Ferrea valves. The heads flowed about 250 on the intake side, which is right around where the Edelbrocks flow out of the box without any port work.
This engine made 422 hp @ 5500 with 466 lb-ft of torque at 4000 rpm.
I have rebuilt engines from Southern Automotive where they have used Edelbrock heads, and they did not do any port work to the ones that I have seen.
With that being said, I would imagine you're somewhere in the 425-450 hp range, even with the Edelbrock heads.
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The same day I was at Keith's shop watching my dyno run they had I believe 3 stock-part, restoration 428 CJs finished, dynoed, on stands and bagged up. I asked the dyno operator what they tested at and from memory he said around 425 HP also. Not bad for an engine Ford advertised at 335 HP.  |
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