572 jets
 

Im just curius anyone using a large displacement engine,what size jets do you use?

need more info. too many variables. carb size? head and cam specs? etc. :hitfan:

zz572 crate engine marinized 620 hp
1050 6.5 power valve
731 cam
single plane intake
9.6-1 comp
stock alum heads, 115 chambers

power valves both sides ?, if so, try 85-88 square, but will depent on a lot of things, if no power valve in secondary try about 6 #'s higher there, Rob

You might give Dean Nickerson (Nickerson Performance 215-781-1370) a call and see what he has to say. Don't know how he is about giving out free advice but a phone call doesn't cost much. Maybe get a price from him on tweaking your carb to match your engine and boat specs.

622 N/A 1050 no P/V 96 Squared, hope this helps. Oh ya, I'm at 3600ft.