I have been contemplating the same thing. Mine is 96 5.7 2bbl and she will run about 53-54 with a 19P 3 blade. Not sure if I want to spend all that $ just to get 4-5 more MPH out of it and have to stop at the pump more often. I really don't think I will gain anything on holeshot, just top end.
My brother has an 85 5.7 4bbl (listed at 260hp) and his will do 58 with 2 on board with 21P 3 blade (Chapparel 200XLC which is just under 21ft and is about 2800lbs empty).
I have a 2001 3300scr with twin 5.7 and 2 barrel carbs.
Im planing on having mine converted this year to 4 barrel webers with new intakes.
Currently i have 19 pitch 19 inch SS props (Bravo 2) .
By gettin another 15 hp out of each side I can afford to go 21 pitch props.
Out of the hole I will use more fuel but once on plane and in my new sweet spot, 3 or 4 MPH faster and less rpm I should save fuel on longer cruises.
The only question I have is should i be looking at 4 blade props or stick with 3?
Carb upgrade
Linear Mode
