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02-29-2008, 10:46 AM
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#1
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Registered
Join Date: Feb 2008
Posts: 23
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Looking For Advice
Hi There, I Am Looking At Procharging My 272 Baja 502 Mpi/efi 415 Hp, And Was Wondering If Anyone Can Help Me On What Pitch, Diameter And How Many Blade Prop I Should Run With A Charger,( Rev Limiter Is 5100rpm), I Am Now Running Stock With A 23 Pitch Mirage 3 Blade Prop At 4900 Rpm.. Thanks
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02-29-2008, 12:01 PM
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#2
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Registered
Join Date: Jan 2008
Posts: 54
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Props
You may be able to jump 2-4 pitch sizes. (25 or 27 3-blade) However, I would recommend trying a 22 or 24 pitch, 4 blade Bravo-1.
I also have a labbed, 27 pitch 3 blade Patriot that we ran on a 29' magic w/ a blown 509. With a 1.5 drive it ran 102 MPH @ 6100 RPM. (Its a left hand rotation) let me know if you want to give it a try. (It's for sell if it works out)
Thanks, Curtis
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02-29-2008, 01:23 PM
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#3
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Charter Member # 55
 Charter Member
Join Date: Oct 2000
Location: Omaha
Posts: 11,046
32 Active Thunder
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WhaT SC and how much boost????
Probably a 26 Bravo 1 or something close will be your right prop.
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03-04-2008, 10:03 PM
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#4
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Registered
Join Date: Feb 2008
Posts: 23
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Sc Stands For Self Contained And 5 Pounds Of Boost
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03-10-2008, 09:56 PM
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#5
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Offshoreonly Advertiser
Offshoreonly Advertiser
Join Date: Jun 2003
Location: Princeton, Wisconsin
Posts: 2,402
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Tweaked Mirsge Plus for speed!
A Bravo 1 adjusted as needed for the best allaround propeller.
If you need a base line prop, let us know.
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03-15-2008, 01:27 PM
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#6
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Platinum Member
 Platinum Member
Join Date: Jun 2004
Location: Frankenmuth
Posts: 4,075
272 baja/99 mph so far/1000 plus hp
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my 272 ran mid 70's with a stock 4 blade 26 pitch merc w/procharged 502,with more boost it ran high 70's with a tweaked 28 pitch merc 4 blade. If you put a blower on it plan on starting out with a 26 pitch 4 blade. Don't waste your time even trying 3 blades (with the blower),I tried 25's,27's and 29's,boat would barely plane and would blow the prop loose at will at just about any speed. I been running a 272 with different blower motors since 2001,tried it all,Smitty
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03-17-2008, 07:54 PM
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#7
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Offshoreonly Advertiser
Offshoreonly Advertiser
Join Date: Jun 2003
Location: Princeton, Wisconsin
Posts: 2,402
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The 3 blade may have issues planing. However, once on plane, it will give the biggest WOT #'s.
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03-25-2008, 09:42 AM
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#8
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Registered
Join Date: Feb 2008
Posts: 23
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was wondering what diameters i,m looking at, like for example i've seen 14 1/4, 15 1/2, 14 3/4, and so on and i know that this makes a huge difference, thanks Ron..
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04-17-2008, 12:21 PM
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#9
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Registered
Join Date: Feb 2008
Posts: 23
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was wondering if a 15 1/4 diameter 26 pitch 4 blade bravo 1will be a good prop with a M3SC system on my 502 mpi 272 baja? and roughly what i would rev? thanks
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04-18-2008, 12:35 PM
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#10
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Offshoreonly Advertiser
Offshoreonly Advertiser
Join Date: Jun 2003
Location: Princeton, Wisconsin
Posts: 2,402
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It depends on the increase in HP and the rev limiter setting. Also, tweaking the propeller will help the boats over all attitude.
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