Quote:
Originally Posted by Smith Point
Hi Jack 2,
I have a 22' supra ski boat (inboard) W/ a 454, holly 4 barrel, WOT 4200rpm. .
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Hi Smith Point. I believe you may have an issue with either your prop or your tune up. 4200 at WOT is way too low for a 454. Most of the marine V8's are calling for a WOT of around 4800-5000 rpm. Has the max RPM always been that low or is this something that has happened over time. You may want to find a good marine mechanic to sort out your issue.
FYI I've got a 25' Chap stern drive with a 454 and I'm at 5000-5200 wide open at a little over 50mph. I don't drive at that speed but that's where I end up with the "hammer down"
Good Luck
CT