Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #1  
Old 11-23-2012, 11:25 AM
powercorps powercorps is offline
TT Newbie
 
Join Date: Aug 2012
Boat: Mastercraft X Star 2008 MCX 350
Location: Northeast
Posts: 3
need more power from MCX 350

To those of you who are mechanically inclined please help. I have an 08 x-star with the MCX 350 engine. When running the flyhigh x-star bags my boat takes a long time to get up to speed. I have already changed the propeller. Is there anything I can do to boost my power?
Reply With Quote
  #2  
Old 11-23-2012, 12:04 PM
mikeg205's Avatar
mikeg205 mikeg205 is offline
Moderator
 
Join Date: Aug 2011
Boat: 1995 Pro Star 205 5.7 Liter
Location: Plainfield - Joliet, IL
Posts: 11,097
Send a message via Skype™ to mikeg205
What is happening...slow to plane? what are the rpm's when when you hit the throttle on a start? How much weight in boat with ballast? Which prop are you running now?
__________________
...A bad day water skiing still beats a good day at work...1995 Pro Star 205....
Reply With Quote
  #3  
Old 11-23-2012, 03:27 PM
Kyle's Avatar
Kyle Kyle is offline
MC Maniac
 
Join Date: Jan 2007
Boat: 93 Prostar 190
Location: Fort Worth, TEXAS
Posts: 3,182
Are the ballast fat sacks all in the back or do you have weight up front as well?


Adding HP to your mcx will be hard. Only due to the fact that the computer (ECM) will be programed for the factory mcx setup. I know that it is possible to reflash a automobile ECM but in the marine world it is hard. If you find someone able to do it, then it will be expensive.


Engine parts are the cheap side the fine tuning of the computer could cost a fortune.


What prop like mentioned above?

Does the boat run like it is designed to do without weight and only you driving?
__________________
Rollin' Gangsta Style

Quote:
Originally Posted by Thrall View Post
"Heavy" beer is for wine drinkers that are too embarrassed to drink wine in front of their buddies. "Light" beer is a drinkin' man's beer!
Quote:
Originally Posted by thatsmrmastercraft View Post
If you want bling like the big dawgs, ya gotta lift your leg a little higher.....
Reply With Quote
  #4  
Old 11-26-2012, 07:11 AM
CantRepeat's Avatar
CantRepeat CantRepeat is online now
 
Join Date: Jul 2008
Boat: 06 X30
Location: Roll Tide!!
Posts: 8,346
Quote:
Originally Posted by powercorps View Post
To those of you who are mechanically inclined please help. I have an 08 x-star with the MCX 350 engine. When running the flyhigh x-star bags my boat takes a long time to get up to speed. I have already changed the propeller. Is there anything I can do to boost my power?
What prop, more importantly, who recommended the prop?
__________________
Tim
Gone, surfing.
Reply With Quote
  #5  
Old 11-26-2012, 11:13 AM
powercorps powercorps is offline
TT Newbie
 
Join Date: Aug 2012
Boat: Mastercraft X Star 2008 MCX 350
Location: Northeast
Posts: 3
It is a shallower prop. My boat is in storage right now so i will have to take a shor trip to get you actual information on it. I purchased the boat used and the guy I got it from said he put that prop on to help with getting out of the hole faster when running ballast. I would imagine the origional prop would make it worse but i have not tried it. For ballast I fill the hard tanks plus the 2 rear and 2 front flyhigh sacs made for the x star.
Reply With Quote
  #6  
Old 11-26-2012, 01:30 PM
willyt's Avatar
willyt willyt is offline
MC Devotee
 
Join Date: May 2009
Boat: ER xstar
Location: high in the middle and round on both ends
Posts: 1,857
don't take offense to this...

you absolutely sure you need a wake that big?
if you think you do...
try dumping the rear hardtanks... if you have people on board they do absolutely nothing to help the wake. add a 350# walkway sac to the bow and drive very, very carefully.
Reply With Quote
  #7  
Old 11-28-2012, 07:50 PM
Jerseydave's Avatar
Jerseydave Jerseydave is offline
TT Hero
 
Join Date: Jul 2004
Boat: 2005 X-STAR & 1993 Prostar 190 Limited
Location: Jersey
Posts: 5,401
While the MCX is no super-powerful engine it should get the job done for you with the correct prop. We need to know what props you have tried.

WillyT is right, not many riders would need that much weight.
My setup now is (2) 400# sacs in rear lockers (soon to be 720's), full KGB and 750# sac in front walkway.
I don't use the rear hard tanks at all.

Jeff Barton, Keith Lyman and Josh Palma seem to like it fine.
__________________
I was njskier on here.
Reply With Quote
  #8  
Old 11-28-2012, 08:04 PM
onewheat's Avatar
onewheat onewheat is offline
MC Fanatic
 
Join Date: Mar 2007
Boat: 2013 Mastercraft X-25 with the awesome 6.2
Location: Moving again...
Posts: 683
If you want noticeable power, you will have to add serious hardware (like a supercharger) to your engine. An ECM reflash or other small bits won't give you the kind of power increase you are talking about. Do what you can with the prop and then you might have to go big money if that won't help enough.
__________________
onewheat

2013 X-25 - Love it!
2007 X-15 - Sadly no longer mine
Reply With Quote
  #9  
Old 11-28-2012, 08:17 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 25,275
Unscrew throttle knob, sell boat, replace with boat with larger engine. Sorry. But modding the MCX for more power is going to be crazy expensive and probably impossible due to software restrictions. The advertised hp is supposedly a little on the high side. And by "a little," I mean a lot.

But as mentioned above, repropping is probably your best bet in your current setup.

Good luck.
__________________
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.

FAQ


Tyler Ski Club


To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.

Last edited by east tx skier; 11-28-2012 at 08:20 PM.
Reply With Quote
  #10  
Old 11-30-2012, 01:57 PM
willyt's Avatar
willyt willyt is offline
MC Devotee
 
Join Date: May 2009
Boat: ER xstar
Location: high in the middle and round on both ends
Posts: 1,857
The most aggressive props out there are the OJ 14.75x13 and the acme 15x12
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 10:00 PM.