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Altho graphs will show how much hp/tq was made at what rpm, sometimes you may get a graph that has a funny look to it that is the result of a time difference that actually effects the look of the line but not much the numbers.
I recently was doing an 57 chev with a gross assortment of components that as a result of the small diameter, long tube headers, and cobbled exhaust system (rump,rump,loud) and a manifold for extreme high rpm that had a slump? in the curve after the initial hit from down low (after header tune rpm) and before it got to the manifold tuned range------wasn;t something you could feel in drivability tests but the dyno did show it up----just a slight lessening of the curves but when done on a graph/chart without TIME as a basic looked weird!
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