AFR 325 flow sheets.... anyone ever flow these heads?
05-11-2017 | 09:12 PM
#762
Registered
Joined: May 2009
Posts: 3,895
Likes: 124
From: Chicago, IL; Onekama, MI
That wasn't the point. Point was to try as many props as you can because you don't know what will work best on your boat.
05-11-2017 | 10:12 PM
#763
Registered
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
I tried Hydro's, Bravo's, Rev4's and Mirages on my boat last year. The best prop was the Bravo, with the boxes. Prior to the boxes the fastest was the Hydro's. The Rev is a nice prop but the biggest you can buy is a 25, so for me, that's too small. I'd really like to try Cutting Edges new props. When you can get a custom prop for $600, IMO thats a hell of a deal if they work. BBlades changes close to that, just to do the lab work.
05-11-2017 | 10:15 PM
#764
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,692
Likes: 217
From: Olmsted Falls,Ohio Marblehead,Oh
I hear ya, so far with any engines... the bravo seem to lift transom and bow steer boat... maybe a smaller one won't... inwill keep trying things as I can
05-11-2017 | 10:21 PM
#765
Registered
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
I say gut the cabin. Those old cigs had more wood down there than the building department at Menards. Rip it out and let the local beavers work with it. Maybe they can build a dam that will raise the water level on lake erie up .
05-11-2017 | 11:05 PM
#767
Registered
Joined: Nov 2003
Posts: 190
Likes: 2
From: Annapolis, Md
Yea I would think your engines would have at least another 50hp at 5,600-5,800 than they do at 5,200 ? Your old Dyno numbers should give some idea. I found I ended up running my larger props the past few years because of the higher cruise speeds and lower exhaust noise at my 4000 rpm cruise - where I spent the majority of my time because the hull likes that speed the best - even though it would limit my top rpm's to 5,100. It had older 5" dry CMI's that you couldn't put mufflers in without blowing exhaust thru the rope seals for the tails - and they were deafening at the 4,500 rpm needed for that same cruise with the smaller props. With the SM gen III's I can run the GGB muffler inserts, which sound awesome btw, so I should be able to let the new motor spin up this year and actually use that last bit of power up at peak power rpm's.
Last edited by Hang Time 27; 05-11-2017 at 11:40 PM.
05-11-2017 | 11:12 PM
#768
Registered
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
05-12-2017 | 09:31 AM
#769
Registered
Joined: Apr 2005
Posts: 2,998
Likes: 127
From: Lees Summit ~ LOTO 10MM
Ouch. Those things really fell off after crossing the tq/hp threshold it seems. Another reason for Tim to be disappointed as I thought he wanted to spin to 58-6k. Hope this new setup does him right
05-12-2017 | 02:59 PM
#770
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Good to hear you can put everything past you now.
