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I have a Quickfuel 604 crate carb for my 604 engine. I just bought a steel head limited engine that is the same displacement and is estimated at around 550 horse power and will be turned around 7400 rpm compared to 6700 rpm on my crate engine. What changes might I have to make to this carb for this higher horse power engine? I'm thinking bigger jets but not sure about power valves etc. Any help would be greatly appreciated.
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"Out of every one hundred men, ten shouldn't even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back."
— Heraclitus -
we did the same thing. but went from a 602 to a limited engine. we ended up with basically the same carb but out back jets went up like 1 or 2 sizes if i remember right. also had to adjust the float levels too. basically you just need to put it on the motor and tune it is nice. run it and check the plugs. we also played with different cams a little bit to dial it in. -
Thanks for the info. John 1*"Out of every one hundred men, ten shouldn't even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back."
— HeraclitusComment
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