Prop Selection
#1
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Prop Selection
The boat is a 25 outlaw 7.4 mpi 310 hp Bravo 1 1.50 ratio. running a 21p mirage plus (Wot 4600-4700)
I am adding a procharger 5psi bringing the crankshaft hp from 340 to 500... I was told by procharger that the kit will not add any rpms I dont no if thats true or not, however I am looking find a good place to start prop wise. A procharger tech said that you would typicaly go up 4 sizes after adding a procharger and another company said No way go up two sizes. So at this point I have no idea what to do, should I wait until I install the procharger and run the 21p and see what I get for rpm then adjust or should I just start with a bigger prop? Does anyone have any ideas as to what I should run?
Thanks,
Derek
I am adding a procharger 5psi bringing the crankshaft hp from 340 to 500... I was told by procharger that the kit will not add any rpms I dont no if thats true or not, however I am looking find a good place to start prop wise. A procharger tech said that you would typicaly go up 4 sizes after adding a procharger and another company said No way go up two sizes. So at this point I have no idea what to do, should I wait until I install the procharger and run the 21p and see what I get for rpm then adjust or should I just start with a bigger prop? Does anyone have any ideas as to what I should run?
Thanks,
Derek
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#5
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I would check the internals of that engine before putting a Procharger on it......also I would take anything a "tech" at Procharger says with a grain of salt....just saying...
#6
My 25 Ol just last week with a carb 7.4 480 hp 64.1 gps still tuning the engine. With 25p Ballistic prop. Will try the B1 24p next week.
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I was told similar things about the procharger people so I figured I would to turn to the oso members for advice. Surely someone out there has the similar set up.