Quote:
Originally Posted by 90503
I think the Z/28 had a few options for that engine...a cross-ram, dual-carbed manifold comes to mind....For sure would bump up hp....
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Very few of the cross rams were ever used on the street, the single four barrrel carb was quite enough for the street as it was a Holley 780cfm double pumper. Once you made some linkage adjustments to the carb to better control the secondaries and or re-jetting, you were pretty much at optimum gas intake for the 302cid engine as built at the factory. Back in '69 I found a lot of improvement to be had from ignition improvements like a dual point distributor. Chevrolet Dyno charts from back in the day show the single four barrel producing 440hp@ 7,400 rpm and the cross ram dual quads producing 463hp@ 7,400 rpm.
Clyde