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  • "True HP"

    Hello All - during my new boat search I was trying to decide between the Imor 5.7 or 6.0 and a well respected MasterCraft dealer (by most of us on ths forum) sent this email below regarding an independent study on "true HP" for the top 3 motor companies. (see the attachement) I found it very interesting and if this is something you've already seen sorry for the re-post!
    ENJOY:

    Hey Paul

    Most Manufacturers overstate their HP dramatically, as you can see below from the CARB testing the true HP of each engine. That PCM your buddy has is really only 360HP, not 409 as they advertise. The horsepower of the Ilmor 5.7 is 320 vs 277 in PCM. All of our staff can see a dramatic difference in the performance of the ilmor vs indmar. Unfortunately, we are usually focuses on torque with extra ballast, not top end.

    One of my employees is a big barefooter, and I was asking him about it. He said that with your size the Illmor would be really close to getting your 44MPH, but couldn’t guarantee it. He did mention that all footers are using the 5.7 and he doesn’t even know anyone with 6.0 Ilmor in MC. He said some will get the tower also, which helps with the start and reduces drag at top end, because it is pulling up. I checked with my rep and he said everyone he knows foots with 5.7 in Ilmor.
    Attached Files

  • #2
    That is interesting. So the Indmar MCX that many of us have is only 308 HP, not 350 HP?

    Comment


    • #3
      I guess so clark?? Here is the full attachment with website that didn't fully download on my first email.
      Attached Files

      Comment


      • #4
        Interesting. In the somewhat distant past, PCM has been known to understate hp, but not by much.

        The 308 hp on the MCX is right in line with what I was told by another MC dealer about 5 or 6 years ago.
        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.

        Comment


        • #5
          That's interesting stuff, I didn't think they would inflate the ratings by as much as 40 or 50 HP

          Comment


          • #6
            Originally posted by Theclarks1111 View Post
            That's interesting stuff, I didn't think they would inflate the ratings by as much as 40 or 50 HP
            Lots of things can affect a dyno. All I know is that this number was without the exhaust tips. No other info specific to the testing other than that. Take it for what it's worth. If you or anyone else has a lot of in depth knowledge of how these things work and how numbers can change based on tiny condition changes, you may be able to make yourself feel more or less comfortable with that figure.

            I have seen dyno figures from older PCM GT-40 figures come out around 311 or 312. They are rated at 310.

            A lot of this drop off might be due to the mandatory cats put on the boats in around 06 or so. But that's just speculation.
            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.

            Comment


            • #7
              Originally posted by Theclarks1111 View Post
              That's interesting stuff, I didn't think they would inflate the ratings by as much as 40 or 50 HP
              It's all one big "gray area". I had another guy tell me that Ilmor actually has a higher HP than what they published. He said the reason is because if the true HP was stated then insuring the boats would be very difficult.......Who knows???

              Comment


              • #8
                Well I guess if I'm actually at 308 HP, I'm over it! I am plenty happy with the MCX, even with 2500 lbs of ballast, it still performs very well.

                I enjoyed seeing that information though...

                Comment


                • #9
                  Originally posted by PT 1999 ProStar View Post
                  It's all one big "gray area". I had another guy tell me that Ilmor actually has a higher HP than what they published. He said the reason is because if the true HP was stated then insuring the boats would be very difficult.......Who knows???
                  My Allstate agent keeps offering to insure my boat. I keep reminding her that we tried that 10 years ago and that their stated HP to length formula makes it impossible.
                  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.

                  Comment


                  • #10
                    Originally posted by east tx skier View Post
                    My Allstate agent keeps offering to insure my boat. I keep reminding her that we tried that 10 years ago and that their stated HP to length formula makes it impossible.
                    This year was the first time AMICA agreed to insure my boat. The new one with a 6.0L go figure!!

                    Comment


                    • #11
                      I have mine through Voyager Marine Ins., underwritten by A.C.E. Agreed value. Something like $175 per year.
                      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.

                      Comment


                      • #12
                        Originally posted by east tx skier View Post
                        My Allstate agent keeps offering to insure my boat. I keep reminding her that we tried that 10 years ago and that their stated HP to length formula makes it impossible.
                        That's hilarious! I have only used Progressive, but I think when I gave them the make and model, it defaulted to the RTP engine. I'm curious if I had told them 350 HP, I would not have been able to get insured.

                        Comment


                        • #13
                          Originally posted by Theclarks1111 View Post
                          That's hilarious! I have only used Progressive, but I think when I gave them the make and model, it defaulted to the RTP engine. I'm curious if I had told them 350 HP, I would not have been able to get insured.
                          My policy was underwritten by Progressive a couple of years ago. I started hearing horror stories about coverage and asked Voyager to find me someone else. Saved $100 per year on my premium in the process. Have used A.C.E. before. They do just as well at taking my money as Progressive ever did.
                          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.

                          Comment


                          • #14
                            I also utilize A.C.E. and recently had to file a claim on my fishing boat.... I was amazed at their service.... I pay $180 per year for my MasterCraft......
                            Ted W

                            Hook Em' Horns

                            Comment


                            • #15
                              I'll have to look into that. I think mine is around $400 a year based on agreed value also.

                              Comment

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