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  #21  
Old 08-18-2010, 01:51 PM
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DooSPX DooSPX is offline
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Boat: 1991 MasterCraft Prostar 190 PowerSlot
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There you go!!!

and WOW!!!!!!!!!

that is a nice boat... I think changing to the Prostar graphics will look killer on there if you dont like the tribal look.
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1991 PROSTAR 190 Flagship Blue POWERSLOT OJ XMP CNC 13.7x17.5 .110 4B
A.K.A. One of a kind mistake
2011 Best In Show- 1987-2000 class

Trying to keep slalom alive

Need a new prop to fit your needs? Call OJ PROPS 800-359-9730

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Originally Posted by flipper View Post
"It's better to keep your mouth shut and let people think you are stupid, than to open it and prove it"?
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  #22  
Old 08-18-2010, 02:21 PM
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russlars russlars is offline
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Boat: Mastercraft 205, 1999, LTR
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Quote:
Originally Posted by DooSPX View Post
lately I have found the CS of bill to be a little lack luster. maybe its the time of the year or something.
Acme does make great props, but what many do with OJ is get props the same specs on paper as the other. OJ said to get the truest comparison between say the acme 13x12 would be a 13x11.5 OJ.
You have to speak directly to OJ and I recommend telling him what props you have or are going to try from the other brand, then will get you the best one for you app.
example, I had more questions about props... he said lets put $XXX.XX on your card and tell what one you like better. Eric as answered my questions with only mentioning the price of the prop one time, plus you dont have to pay for it up front.

you may find the acme to be the best, but you will never truly know till you have tested all the OJ counterpart
No question that it is impossible to surpass the helpful customer service of Eric at OJ. I went through the prop trying experience last year and after trying several OJ's and ACME props ended up buying one of each. I actually prefer the slalom wake my boat throws out with the OJ, but when I am in the drivers seat I prefer the seat of the pants performance and speed of my ACME 541.
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1999 Prostar 205 with 330 HP LTR
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  #23  
Old 08-18-2010, 02:24 PM
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amcmac amcmac is offline
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I have almost the exact same boat as you, 2005 X7, but with the RTP-1. I top out around 40mph on gps as well. Not sure if the MCX should make it go faster or not. I do wish I was around 45 as well.
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  #24  
Old 08-18-2010, 02:39 PM
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Andyg Andyg is offline
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Boat: 2008 PS197 LY6
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Euro,
I went through the exact same problem you are having now, the only difference is that my boat was a 2003 197 (including mini tower) with the MCX and 1:1 tranny. I first tried messing with the prop and it really didn't help. The boat would top out in the 42-43 range with just me in the boat. Trying to barefoot the boat would drop the speed down to 39-41 depending on the day. I tip the scales at around 210 and with size 10 1/2 ft that makes for a rough run at those speeds. I like footing in the 44-45 mph range. Trying to double barefoot was next to impossible.

I then decided instead of buying a new boat I would try and do some minor engine modifications to see if I could get another 2-3 mph out of the boat. Well after about $3000 I was still at 43 mph. I gave up and boat a 2007 with the LY6 and now have a 2008 with the LY6.

I came from a 1997 PS190 with the LT1 and powerslot. I didn't think twice that getting a new 197 with a 350 HP MCX would have any problems performing on the same level as the 1997 PS190 did. I have regretted every day since the day I traded in that 1997 PS190. The hole shot was better, the top end was better, the slalom wake was better. I still ski behind the 1997 PS190 on occasion as my buddy owns it now and he skis behind my boat. Every time we ski/barefoot behind my 2008 with the LY6 we comment on how much better it is when we ski/barefoot behind his boat.

As someone else mentioned I think you are better off with a three blade prop for you setup. I don't think it is going to get you to where you want to be. The problem is that these 197s are not barefoot boats. Even with my LY6 I am disappointed in my barefoot speed. I thought for sure with the LY6 I would be hitting 50mph with just me in the boat. On a good day with the stock OJ 3 blade prop I am lucky to hit 45. With the ACME 3 blade I can usually get the boat up to about 47ish.

Last thing to note is always use a GPS to verify your speed. All of my testing was done with hand held GPSs to verify speed.
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  #25  
Old 08-18-2010, 02:47 PM
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DooSPX DooSPX is offline
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These hulls where not built for top speed period.
their wetted surface area is unreal.
the engine mods are going to get you is hole shot, and maybe 1 mph. if that.
I still think a prop will be be best bang for you buck. if you have the patients, OJ will get you happy. you should still be able to run 42-43 in your X7, and a prop change may do it.
andyg is right about the new 190/197 not being barefoot boats...
to really get barefoot speeds that many like, a blower is the only option...
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1991 PROSTAR 190 Flagship Blue POWERSLOT OJ XMP CNC 13.7x17.5 .110 4B
A.K.A. One of a kind mistake
2011 Best In Show- 1987-2000 class

Trying to keep slalom alive

Need a new prop to fit your needs? Call OJ PROPS 800-359-9730

Quote:
Originally Posted by flipper View Post
"It's better to keep your mouth shut and let people think you are stupid, than to open it and prove it"?
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  #26  
Old 08-18-2010, 09:55 PM
Tags Tags is offline
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Join Date: Jan 2010
Boat: X7
Location: Australia
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I have the same problem. The standard 4 blade on my 04 X7 is great for towing every other discipline of skier except barefooters. Is there anyone that can state which is the best prop from either OJ or Acme to get a few extra mph out of a MCX in an X7? Surely enough people have gone through this that someone knows for sure.
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  #27  
Old 08-18-2010, 10:18 PM
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Hoosier Bob Hoosier Bob is offline
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Join Date: Aug 2004
Boat: 1993 MASTERCRAFT PROSTAR 190 285HP 351 INDMAR
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Sounds really odd? Gas? What octane? I have a much older boat but get much more mph with 6 people and bimini up. I ran some cheap gas, knocked like crazy and adjusted timing. Lost top end and power. Yours will adjust to whatever you put in it. I am running 89-93 and 46-48 no matter what my load. Some minir engine mods but..... I have been in a few 197's MCX and the LTR I believe. Felt ok maybe a bit softer pull than mine but never ran them over 40 anyway. 43-45 I would think is very acceptable. You can pitch and HP the crap out of an inboard but eventually you will cavitate ot drive the bow into the water. Your choice.

PS I have a line on my tach at 4,000. I rarely exceed this as what would be the reason. I do know how fast my boat goes and if yours is lacking it is lacking at 36 as well. X7 really never needs to go above 22 anyway! Lol!
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BAREFOOTING: I knew it was gonna hurt when I felt my arse cheeks hit me in the back of my head!

!UOY NAHT RETSAF MA I TUB KNURD EB YAM I

Last edited by Hoosier Bob; 08-18-2010 at 10:20 PM.
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  #28  
Old 08-18-2010, 11:04 PM
Tags Tags is offline
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Quote:
Originally Posted by Hoosier Bob View Post

PS I have a line on my tach at 4,000. I rarely exceed this as what would be the reason. I do know how fast my boat goes and if yours is lacking it is lacking at 36 as well. X7 really never needs to go above 22 anyway! Lol!
thats not the case. the 4 blades fitted on 190's, 197's and X7's is a tournament style prop designed to provide more pull and a more consistent speed for the 3 disciplines trick, slalom and jump. At 36mph using perfect pass running the course my boat has far less variance than a mates older PS190 that has a much higher 48mph top speed. Top end speed has no bearing on torque or pull at lower speeds and rpm's
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  #29  
Old 08-19-2010, 06:28 AM
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eurosysytem0 eurosysytem0 is offline
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Thanks for the input
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  #30  
Old 08-19-2010, 06:31 AM
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eurosysytem0 eurosysytem0 is offline
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Boat: X7 MCX350
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Thanks for the input. In the Uk basic petrol/gas is at least 95 ROM/Octane- so I dont think its the fuel. I guess the boat is just what it is---slower!

Regards
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