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  #11  
Old 09-08-2013, 09:21 PM
blackcreek blackcreek is offline
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Boat: 1997 prostar 205 lt1
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Quote:
Originally Posted by Cloaked View Post
damn...

As Roy D. Mercer would ask, "How big a' boy are you?"

.
Maybe he has unusually small feet?
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  #12  
Old 09-08-2013, 11:01 PM
phil_edgecumbe phil_edgecumbe is offline
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Join Date: Oct 2012
Boat: Prostar 205 - 1997
Location: Australia
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Thanks for the responses guys. I've decided to "just go ski" rather than obsess about how to make the boat go faster.

Winter lay-up causes us boat owners to ponder these sorts of things.

In summer we just go skiing and don't worry about it...
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  #13  
Old 09-09-2013, 07:51 AM
tommcat tommcat is offline
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Originally Posted by phil_edgecumbe View Post
Thanks for the responses guys. I've decided to "just go ski" rather than obsess about how to make the boat go faster.

Winter lay-up causes us boat owners to ponder these sorts of things.

In summer we just go skiing and don't worry about it...
Even if you decide to not "go faster", i'd still look into why you are turning such low rpms. you may have an actual problem that needs addressing.
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  #14  
Old 10-12-2013, 04:54 AM
phil_edgecumbe phil_edgecumbe is offline
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Join Date: Oct 2012
Boat: Prostar 205 - 1997
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Update:

Took the boat out for it's first run for the season.
I had the strut bushes replaced as they were a bit sloppy, prop checked/balanced and drive shaft alignment checked. The prop is the standard 13x13 4 blade version.
Filled the fuel tank with fresh petrol and added a bottle of Injector Cleaner.

It now does 48mph at 4800rpm with WOT. 3mph faster and no doubt running more efficiently.
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  #15  
Old 10-12-2013, 07:22 AM
Ben Ben is offline
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Join Date: Jul 2004
Boat: '94 PS205 LT1
Location: Michigan
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Good update. Depending on your situation, old also recommend not filling he fuel tank full. Less weight.
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  #16  
Old 10-12-2013, 07:46 AM
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Mark rsa2au Mark rsa2au is offline
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Boat: Mastercraft X5 2001. 310hp preditor
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Originally Posted by Ben View Post
Good update. Depending on your situation, old also recommend not filling he fuel tank full. Less weight.
What??
My tank is not big enough for a full days sking anyway....
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  #17  
Old 10-12-2013, 08:56 AM
blackcreek blackcreek is offline
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Join Date: Aug 2006
Boat: 1997 prostar 205 lt1
Location: Jacksonville Fl
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Quote:
Originally Posted by phil_edgecumbe View Post
Update:

Took the boat out for it's first run for the season.
I had the strut bushes replaced as they were a bit sloppy, prop checked/balanced and drive shaft alignment checked. The prop is the standard 13x13 4 blade version.
Filled the fuel tank with fresh petrol and added a bottle of Injector Cleaner.

It now does 48mph at 4800rpm with WOT. 3mph faster and no doubt running more efficiently.
Sweet! The LT-1 pulls timing if there is any knock due to using sub standard fuel. If you are going to be running wide open all the time I would recommend only high test fuel as a buffer against knock. From personal experience if you are running the original plug wires I would ohm out each wire for proper resistance. I had two wires that would not read any resistance meaning there was an internal break in the core. A spark will still jump if the internal break is small enough but it does lower the spark energy enough to lower performance. If you are still in search of more MPH I would talk to eric at OJ for proper sizing and type of prop. I was not aware that the LT-1 with the 1:1 transmission came with a 4 blade prop as standard. A three blade CNC prop might get you another MPH or two, but there are always trade offs.
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  #18  
Old 10-14-2013, 10:57 PM
Ben Ben is offline
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Quote:
Originally Posted by Mark rsa2au View Post
What??
My tank is not big enough for a full days sking anyway....
Not sure of your question. I was trying to say to run with less than full tank for skiing if possible. This would improve wake a little and maybe top end too.
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  #19  
Old 10-14-2013, 11:16 PM
88 PS190 88 PS190 is offline
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Quote:
Originally Posted by Mark rsa2au View Post
What??
My tank is not big enough for a full days sking anyway....
Just depends how your lake access is.

For folks like me who usually stop by the dock after ever hour or two, I seldom add more than about 10 gallons total to the tank, and that is only if I know we have 3-4 skiers in the boat, and beautiful conditions with no one waiting at home.

Otherwise I usually have 5 or 6 in when we leave the dock, and about 2-3 when we get back. Then I add another 5'er and go out again.


Folks who trailer to a lake/river and then go out all day tend to fuel the boat at a pump, and top it up.

Since I'm going off cans, I will seldom put multiple cans in the tank at a time, as mentioned, adds weight to the back, isn't great for the wakes.
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  #20  
Old 10-14-2013, 11:24 PM
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mikeg205 mikeg205 is offline
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I run 41mph with my 4 blade had 43 with my 3 blade- have never seen tach go past 4500 RPM - less now with 4 blade but I expected that.
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