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  1. #1
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    promax vs drag 4 comparison.

    Hi looking for opinions and knowledge about props before spending money foolishly. I have a 96 Liberator 21 foot with a 2013 300xs with 1.75 sportmaster and a 12" slidemaster jack plate. the motor is set at 1" above the pad and running a 31 pitch promax. Boat runs 97mph on gps. I know Randy Corson runs Drag 4's on his and was wondering if there is a big difference in performance between the Promax and Drag 4's either out of the hole, midrange or top end. Any input will be greatly appreciated. Thanks.

  2. #2
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    I ran both on my Talon. My 31 lab Pro max comes out of the hole slower that the 30 Drag 4 but that is the difference in Thru Hub and over hub props. I could run the ProMax higher on the jack plate before I would blow out.
    2005 APR FORMULA 2 ROOKIE OF THE YEAR

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  4. #3
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    Quote Originally Posted by dmillar View Post
    Hi looking for opinions and knowledge about props before spending money foolishly. I have a 96 Liberator 21 foot with a 2013 300xs with 1.75 sportmaster and a 12" slidemaster jack plate. the motor is set at 1" above the pad and running a 31 pitch promax. Boat runs 97mph on gps. I know Randy Corson runs Drag 4's on his and was wondering if there is a big difference in performance between the Promax and Drag 4's either out of the hole, midrange or top end. Any input will be greatly appreciated. Thanks.
    I have a 2008 Lib 21 with a 300xs. My L/U is a 1.62.

    I have tries a bunch of props and the best I've been able to get is

    Merc Trophy Plus 28p 6100 rpm @ 85 mph
    Merc Lightning ET 30p 5800 rpm @ 93 mph
    Drag 5 30p 5700 rpm @ 88 mph
    Ron Hill Signature Eagle 28p 6300 @ 90
    Promax 29p 5800 @ 92

    I'm about an inch and a half above the pad. This is with full gear and gas, 2 batteries, one person. Makes me wonder what I'm doing wrong.
    .

    I've bought and sold 22 boats in 26 years. I fix them up and then get bored and look for another. It's a hobby.

    Now running a Liberator 21 with a 300xs


    .

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  6. #4
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    Thanks to LARGECAR91 and TRACEF3 for your input. I guess for now I will save my money. I was going to buy a Drag 4.

  7. #5
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    Quote Originally Posted by largecar91 View Post
    I ran both on my Talon. My 31 lab Pro max comes out of the hole slower that the 30 Drag 4 but that is the difference in Thru Hub and over hub props. I could run the ProMax higher on the jack plate before I would blow out.
    Any difference in top speed?

  8. #6
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    I ran 97 with the promax. Never got the Drag 4 to run right
    2005 APR FORMULA 2 ROOKIE OF THE YEAR

  9. #7
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    I really struggled with the Drag 4 on my Liberator with 300X when I had it. I ran short lakes or rivers with turns and I would have to slow down to 70 to get it to turn sharp. I ran an RE4 on that boat and it would turn in the 90's.

    I'm a huge Promax fan now. I have 3 for my current boat. I would loved to have tried one on the liberator.
    21' Allison XB-21 ProSport 300XS



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  11. #8
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    Quote Originally Posted by dmillar View Post
    Hi looking for opinions and knowledge about props before spending money foolishly. I have a 96 Liberator 21 foot with a 2013 300xs with 1.75 sportmaster and a 12" slidemaster jack plate. the motor is set at 1" above the pad and running a 31 pitch promax. Boat runs 97mph on gps. I know Randy Corson runs Drag 4's on his and was wondering if there is a big difference in performance between the Promax and Drag 4's either out of the hole, midrange or top end. Any input will be greatly appreciated. Thanks.
    How many RPM are you turning the Promax at 97 mph? I have a 29p that has been worked. I can only get it to 5800
    .

    I've bought and sold 22 boats in 26 years. I fix them up and then get bored and look for another. It's a hobby.

    Now running a Liberator 21 with a 300xs


    .

  12. #9
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    Promax looks like a four blade tempest to me. Tempest looks like a through hub lightning et
    Hydrostream dreamin

  13. #10
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    This past weekend I was at Clark’s hill lake for the rally and I turned 6000 rpm and achieved a new top speed of 99.0 on gps. With a very slight nose up trim. Trim value didn’t change on my Smartcraft gauge just 2 quick bumps up.

  14. #11
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    Quote Originally Posted by dmillar View Post
    This past weekend I was at Clark’s hill lake for the rally and I turned 6000 rpm and achieved a new top speed of 99.0 on gps. With a very slight nose up trim. Trim value didn’t change on my Smartcraft gauge just 2 quick bumps up.
    With the 31 Promax? One person? Full of gas? How much gear? 2 batteries?
    .

    I've bought and sold 22 boats in 26 years. I fix them up and then get bored and look for another. It's a hobby.

    Now running a Liberator 21 with a 300xs


    .

  15. #12
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    yes with the 31 PROMAX, just me in the boat(160lbs), aprox 12 gallons of fuel at the time. boat has one OPTMIMA blue top battery (1000 cranking amps ) boat does have a sound system with amp and 6 speakers. ropes, bumpers, life vests no anchor on board at the time. I hope this helps.

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