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  #11  
Old 04-14-2011, 08:26 PM
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Only way to know is to dyno the engine.
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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.
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  #12  
Old 04-14-2011, 08:33 PM
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rlwiley rlwiley is offline
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Does ilmor dyno every engine? It would seem that would be the only way to test every engine.
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  #13  
Old 04-14-2011, 08:35 PM
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I guess we just have to go off what MC says. FYI, 2011 numbers are; Indmar engines MCX 5.7L 230kW=308hp, LSA 6.2L 395kw=530hp, L96 6.0L 284kw=380hp and Ilmor engines are MV8 5.7L 239kW=320hp, MV8 6.0L 285 Kw=382hp and MV8 6.2L 321kw=430 hp.
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  #14  
Old 04-14-2011, 08:38 PM
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east tx skier east tx skier is offline
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Based on info I have seen on a dyno of a previous year model of MCX engine, 2011 estimates look very close to actual for that previous year.
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Previous: 1993 Prostar 205

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

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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; 04-14-2011 at 08:44 PM.
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  #15  
Old 04-14-2011, 09:34 PM
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Anyone know what the true rating for the MCX is pre-cats? I have an 05 and don't want to overstate my HP...
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  #16  
Old 04-14-2011, 09:51 PM
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Willy ... my 2008 MCX said it was 350 .... so it must be 350!

oh boy .... I lost 42 HP from the time I placed the order for my boat to the time I took delivery.
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  #17  
Old 04-14-2011, 10:47 PM
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Quote:
Originally Posted by 93Prostar190 View Post
Willy ... my 2008 MCX said it was 350 .... so it must be 350!

oh boy .... I lost 42 HP from the time I placed the order for my boat to the time I took delivery.
I dont know how Indmar rates their engines, but SAE Net hp is measured at the engine's crankshaft, and so does not account for transmission losses. However, the SAE net power testing protocol calls for standard production-type belt-driven accessories, air cleaner, emission controls, exhaust system, and other power-consuming accessories. This produces ratings in closer alignment with the power produced by the engine as it is actually configured and sold.
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  #18  
Old 04-15-2011, 07:55 AM
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Quote:
Originally Posted by j.mccreight@hotmail.com View Post
I dont know how Indmar rates their engines, but SAE Net hp is measured at the engine's crankshaft, and so does not account for transmission losses. However, the SAE net power testing protocol calls for standard production-type belt-driven accessories, air cleaner, emission controls, exhaust system, and other power-consuming accessories. This produces ratings in closer alignment with the power produced by the engine as it is actually configured and sold.
From what I heard at the MC factory on the issue, this is exactly right. Basically Indmar was rating the engines without the belt drivin accessories or production exhaust manifolds. The reason for that was that the same base engine was being developed for multiple boat manufacturers.....

Ilmor rates them as they land in the boat..... With the exception of driveline losses through the transmission.
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  #19  
Old 04-15-2011, 02:25 PM
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Pretty interesting to go back through the years and see the differences in numbers at the CARB website:
http://www.arb.ca.gov/msprog/offroad/cert/cert.php

I was looking at the 2006 vs 2007 numbers for PCM

2006 5.7L 239kW
2007 5.7L 201kW

Lucky I have a 2006 Crusader in my bote Not sure what games have been played over the past, but it sounds like numbers are at least getting to where a reasonable comparison can be made.
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  #20  
Old 04-15-2011, 02:28 PM
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IIRC, 2007 first year of cats on MCX.
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