What kind of speed am I running??
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What kind of speed am I running??

  1. #1
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    Default What kind of speed am I running??

    I picked up a 97 commander 2100lx
    marine power 454 (330hp) 171 hours.
    Factory set back dominator pump with ride plate and place deverter.
    The spedo. (water style) says 50-55 which I feel is close to accurate so maybe 50mph.
    So what speed should she run?
    What will it take to break 60+
    how do I know what style or size impeller I have.
    Oh it is an openbow and I saw 4,500rpm.

    What are you're thoughts?

    Shawn.

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  3. #2
    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by 2ndgenGibson View Post
    I picked up a 97 commander 2100lx
    marine power 454 (330hp) 171 hours.
    Factory set back dominator pump with ride plate and place deverter.
    The spedo. (water style) says 50-55 which I feel is close to accurate so maybe 50mph.
    So what speed should she run?
    What will it take to break 60+
    how do I know what style or size impeller I have.
    Oh it is an openbow and I saw 4,500rpm.

    What are you're thoughts?

    Shawn.
    Welcome! all your "numbers" are pretty much in order , Suspect your probably going to have to make more HP for a few more MPH , likeley Cylinder heads and improved intake, carb and ignition will be a good place to start Tom

  4. #3
    Glendale Arizona Squirtcha?'s Avatar
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    I picked up a 97 commander 2100lx
    marine power 454 (330hp) 171 hours.
    Factory set back dominator pump with ride plate and place deverter.
    The speedo. (water style) says 50-55 which I feel is close to accurate so maybe 50mph.

    Sounds about right.

    So what speed should she run?

    50-55 I would guess.

    What will it take to break 60+

    Money and horsepower (not necessarily in that order). How long would you be happy with 60 mph?

    how do I know what style or size impeller I have.

    Measure it and compare to the charts.

    Oh it is an openbow and I saw 4,500rpm.

    Again........Sounds about right. Probably a AA or A impeller.

    What are your thoughts?

    It's a big, heavy, deep hull with a full interior in the bow. It would take a bunch of horsepower to make it go fast. Going fast is an expensive proposition even when working with a platform that is made for it. Yours isn't. Drive it and enjoy it. That motor should last for years if left stock.

    Some day, if you want to go fast get something different to play with.

    You asked for it.......... It's just an opinion.
    Last edited by Squirtcha?; 06-09-2010 at 08:38 PM.

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  6. #4
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    I agree with Sqirtcha, Leave it alone. Some boats are made for big stereo's and to carry people and beverages! Go buy some beer and a big stereo and call it good.

  7. #5
    Senior Member HKROB's Avatar
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    Quote Originally Posted by 2ndgenGibson View Post
    I picked up a 97 commander 2100lx
    marine power 454 (330hp) 171 hours.
    What will it take to break 60+

    What are you're thoughts?

    Shawn.
    About 500hp should get you in the low to mid 60's.

  8. #6
    Senior Member sleekcraft137's Avatar
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    Just borrow a GPS from one of our buddies and check it out. The GPS is also really helpful when your doing little mods here and there. It lets you know whats working and whats not.

  9. #7
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    Thanks for all the quick replys.
    Squirtcha you're opinion were my thoughts when purchacing the boat but as I should have assumed I find my self curious to see what I can get out of her. I should just keep it for what it is which is a day cruiser family boat and enjoy. I figured left stock would provide a bunch of stressless fun for years.
    Thanks for the input.
    Oh my only concern was 4,500rpm. From you're replys I guess that seems about right. I thought it should be closer to 5,000.

  10. #8
    Senior Member sleekcraft137's Avatar
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    Quote Originally Posted by 2ndgenGibson View Post
    Thanks for all the quick replys.
    Squirtcha you're opinion were my thoughts when purchacing the boat but as I should have assumed I find my self curious to see what I can get out of her. I should just keep it for what it is which is a day cruiser family boat and enjoy. I figured left stock would provide a bunch of stressless fun for years.
    Thanks for the input.
    Oh my only concern was 4,500rpm. From you're replys I guess that seems about right. I thought it should be closer to 5,000.
    Im turning 4200 in my boat. Mostly stock 455.

  11. #9
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by 2ndgenGibson View Post
    Thanks for all the quick replys.
    Squirtcha you're opinion were my thoughts when purchacing the boat but as I should have assumed I find my self curious to see what I can get out of her. I should just keep it for what it is which is a day cruiser family boat and enjoy. I figured left stock would provide a bunch of stressless fun for years.
    Thanks for the input.
    Oh my only concern was 4,500rpm. From you're replys I guess that seems about right. I thought it should be closer to 5,000.
    4500 max rpm should just add to the longevity. I guess you could go to a smaller cut impeller and get your rpm up, but the holeshot would most likely suffer and you probably wouldn't gain much if anything on the big end. Also adding wear and tear to the motor (unnecessarily). Being a stock motor the hp is probably right around 4500 and my guess is the impeller cut is about right. (uneducated guess here)

    Although I had good luck with my last motor (about 500 hp) and it seems to be a good, easily achievable number even on pump gas, (engine life span doesn't suffer a lot), I'd suggest not doing anything as long as the motor is still running o.k. Maybe bump it up a notch when it's time for a rebuild.

    I swore I wouldn't get caught up in the faster faster thing. That'll teach me not to swear.
    Last edited by Squirtcha?; 06-10-2010 at 06:42 AM.

  12. #10
    History Repeating Storz's Avatar
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    Quote Originally Posted by PS&B1 View Post
    I agree with Sqirtcha, Leave it alone. Some boats are made for big stereo's and to carry people and beverages! Go buy some beer and a big stereo and call it good.
    Agreed, just leave it and enjoy it. Mine is also a heavy full interior boat and has been left basically stock for the past 34 years, probably runs right around 55mph as well. Motors can last a LONG time if you maintain them, mine has never been apart (father bought the boat new in '77)
    '84 Laser LTV - Restoration in progress
    '77 Caribbean

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