'87 Kevlar Gun prop question
08-20-2011 | 12:35 PM
#1
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From: New Orleans,La.
'87 Kevlar Gun prop question
Need a starting point on prop selection. Currently running 16.5 x 28 three blade on 3a (big shaft). Cruise speed kinda sucks. Engines are 598s making 785 each. Any suggestions? Thanks,Bob
08-20-2011 | 02:09 PM
#2
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From: Santa Barbara CA. USA
I had a 1984 flatdeck with PSI supercharged 572's running 1.5:1 ratio, #3A drives. I ran 18x30 4bbl's for the longest time and then switched to a set of 18x30 5bbl's.
In my opinion, you need more diameter and either 4 or 5 bbl's.
Gary
In my opinion, you need more diameter and either 4 or 5 bbl's.
Gary
08-21-2011 | 09:30 AM
#3
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From: New Orleans,La.
Thanks RMPRam, When you switched from 4 to 5 blade,what was the result? Did that lift the stern ? Cruise and top end #s change a lot? Anybody else got any suggestions for an old Cig ?
Last edited by Bob280Silencer; 08-21-2011 at 09:33 AM.
08-21-2011 | 11:25 AM
#5
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From: Santa Barbara CA. USA
I only used the 5bbl's once and then sold the boat. I'm sorry that I don't have more info. to give you. The boat was a side-by-side on 35" centers and I was turning the props outward.
