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Optimistic dyno numbers? People do that???
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I wouldn't know, but rumor has it...
My iron block with iron High Riser heads, BIG dual fours and a WAY radical solid roller cam dynoed at 667 horse. 12.5 to 1 compression, tires that couldn't be tamed. The numbers and the chart that came with the car looked legit, who knows. It was dynoed a second time with the side pipes in place and it lost 97 horse power! All I know,,, that motor made didn't make much power until it hit 3,000 rpm and then it went to 7,000 in a freakin' heart beat.
On the street? Take two aspiran before attempting to drive, it was an over the top beast of a ride that got 6 mpg on a good day and would shake you to the core.