Boats For Sale:
Max RPM and Speed |
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OverMyHead 
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Joined: March-14-2008 Location: MN Status: Offline Points: 4861 |
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 Topic: Max RPM and SpeedPosted: September-07-2008 at 9:35pm |
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What should I be getting for maxs RPM and Speed from my unmodified 87 2001 with 351 pcm?
Currenly getting about 40mph and 4000rpm, It is enough but I am curious. I know you want to know what prop, I'll look soon. Do I have to pull it to find Numbers? |
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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JoeinNY
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Joined: October-19-2005 Location: United States Status: Offline Points: 5693 |
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Posted: September-07-2008 at 10:38pm |
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Thats a little weak could be overpropped, tired, or simply in need of a tune up 45 at 4500 should be in line for a stock boat plus or minus
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OverMyHead
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Posted: September-08-2008 at 12:05am |
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It has about 900 hours, seems to run strong without faltering I will check the prop.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
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Posted: September-09-2008 at 12:39am |
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My boat is slightly over propped. It has a 13x13 4 blade oj super cup legend. Its an all stock rebuilt 351 with about 230 hours. Its 30 over with stock compression. It does 4100 rpm's at 44 to 45 on the speedo. (its calibrated with GPS at 34 and 36mph so it should be deecently close on the mph.
Also it should have numbers inbetween the blades if not just take the castle nut off and the numbers should be there. |
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OverMyHead
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Posted: September-09-2008 at 2:06am |
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Cool thanks to both of you.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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OverMyHead
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Posted: September-09-2008 at 2:10am |
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Hey JoeinNY, watched your holoe shot video, WOW
 Wish you were my neighbor, I could use a motor mentor.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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JoeinNY
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Posted: September-09-2008 at 3:21am |
Not a neighbor but I typically make it to the Minneapolis area 5-6 times a year. Thanks for the comment, I am going to need some encouragement to get back to work on that Mustang one of these days.. |
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OverMyHead
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Posted: September-10-2008 at 9:29pm |
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OK here is the prop info Simmon ni-brahl 13x13 super cup. Does that sound right?
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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emccallum
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Joined: August-08-2006 Location: Clarks Hill SC Status: Offline Points: 1084 |
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Posted: September-11-2008 at 7:45pm |
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I believe that is the right/stock size, but I am not familiar with that brand (super cup?). You may want to borrow or try out a new/different prop. SKIDIM, although a bit pricier than say Delta prop, will allow you to test a prop. Try a search on props there is plenty of info for your model on props. Acme 540 is what I run.
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Luchog
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Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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Posted: September-11-2008 at 10:40pm |
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super cup is labeled in my Michigan prop, mine is 13x12 though.
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OverMyHead
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Posted: September-11-2008 at 11:10pm |
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I am thinking I may get this one tweaked for a little more power and then invest in the ACME later.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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Posted: September-12-2008 at 1:16am |
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I've got Federal 13x12 and x13s if anyone needs a test run. Too late for that Martinique.
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OverMyHead
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Posted: September-12-2008 at 2:25am |
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Very generous offer,I think at this point I will wait till spring but I would appreciate trying before I invest $400. Will the offer still stand? and how would it work to get the prop to minnesota?
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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Posted: September-12-2008 at 11:40am |
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I'll UPS it to you, it would really only cost a couple bucks. Make a donation to the site. Supposing our ACME 540 stays in tact the offer(s) will still stand.
We've got 1100 hours on an 88 stock 351 and she turns ~4300 on a good day with any of the three props. |
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OverMyHead
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Posted: September-12-2008 at 8:45pm |
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Thanks Tim, This is just the coolest site with the best people.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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phatsat67
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Posted: September-13-2008 at 6:28pm |
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I think the super cup is how the prop is cupped. My boat works a little to hard swingin that 4 blade it doesnt have as good of a hole shot as Id like it to.
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OverMyHead
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Posted: September-13-2008 at 6:41pm |
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What is your boat and why are there no pictures? From my reading I think I will stick with a three blade but a more modern model would sure be nice.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
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Posted: September-14-2008 at 3:29pm |
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86 2001 stock rebuilt 351 with 230 hours.
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OverMyHead
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Posted: September-14-2008 at 3:47pm |
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Nice
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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OverMyHead wrote: