Thread: New 383 Stroker engine will not rev.

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With the old engine 4000 was the max., but it was a thrown together rebuilt 350 and we know the ignition system was scattering all over after 4000. It pulls hard and fast to about 4000 and then as you trim it up it comes up to 4700. The eldebrock book on he carb says it should have minimum 2 lbs. residual at WOT and I did order a new bigger fuel pump. It now reads approx 1 1/2 lbs at WOT Before approx 18 inches of line and a filter. It's 3/8 fuel line. I thinking that fuel at the carb may be below 1 lb. The new pump is rated 76 gph @ 5lbs. Exhaust is Mercruiser stock , not through hull.. Right now I'm running a 19 pitch 14 aluminum, It's my spare. I have a 19 pitch stainless out to the shop for cupping and venting. I tried a 21 aluminum and lost RPM's and speed.