Thread: Drive height

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    #41
    Bblades is telling me that they always recommend spinning in on BT's for more bow lift. Saying that too much stern lift is an issue with these boats.
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    #42
    Founding Member / Super Moderator Ratickle's Avatar
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    Well, Brett certainly knows a lot.

    The good thing is you have Bravo's. Changing to test takes about 10 minutes......
    Getting bad advice is unfortunate, taking bad advice is a Serious matter!!
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    #43
    Quote Originally Posted by endeavor1 View Post
    I'll measure tomorrow. That way I'm spot on but iirc 2 1/2
    Were you able to get a measurement of your drive depth? Please let me know. Thanks
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    #44
    Founding Member / Super Moderator Ratickle's Avatar
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    Did Chris answer you?
    Getting bad advice is unfortunate, taking bad advice is a Serious matter!!
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    #45
    Registered endeavor1's Avatar
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    Sorry... Busy as hell. Mine are 3 under. Interesting that's what BBlades told you bc I was told the exact opposite by them when they did my props last year. Lmfao...

    I ll try it though
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    #46
    Registered endeavor1's Avatar
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    Also... Looking for a 741 crane cam or 525 EFI takeout cam. Had a gremlin find a home in a lifter
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    #47
    Quote Originally Posted by endeavor1 View Post
    Sorry... Busy as hell. Mine are 3 under. Interesting that's what BBlades told you bc I was told the exact opposite by them when they did my props last year. Lmfao...

    I ll try it though
    Thanks for the info.. You're running stock drives not -2 shorties right?
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    #48
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    Correct. Std length lowers
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    #49
    Thanks that gives me somewhere to start from
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    #50
    Charter Member Coolerman's Avatar
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    Regarding adding bow lift vs stern lift, I know the later 46's had stern lift built into them and they handled muuuuch better, however, some people argued that it slowed them down a few mph. On some of the earlier 46's like Bingham had, I believe he had 5 blades and the boat ran good as it was. I know John P's trip eng 46 ran better when he put on shorties. There area lot of BT's out there as well where the bow runs too high, more so some of the 43's....

    One thing is for sure, each BT is unique and they all run just a bit different. A lot this can do with motor options and other weight distribution factors (IE: if the boat had a generator, fridge, big stereo, heavy blower motors vs stock power, etc). The last style hull from BT with 700's and NXT's was the ticket, ran 90mph and handled great.

    On our boat (a completely different setup, 43 flat deck and 6's), we don't have enough bow lift spinning in at slower speeds, but it flattens out as you get going faster. Spinning out is great up to about 100 or so (rides like a caddy and handles like a go-cart with sticky tires), then it gets too much stern lift at 100+.

    If it were up to me and I had a 46 with Bravo's, I'd probably try -2's with 5 blades and adjust the hull for stern/bow lift as needed. Making hull adjustments really isn't that hard to. That way you can run an off the shelf merc or hering prop so it is easily replaceable if it gets damaged, and it isn't hard to match.
    Last edited by Coolerman; 05-21-2016 at 02:38 PM.
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    #51
    Quote Originally Posted by Coolerman View Post
    If it were up to me and I had a 46 with Bravo's, I'd probably try -2's with 5 blades and adjust the hull for stern/bow lift as needed. Making hull adjustments really isn't that hard to. That way you can run an off the shelf merc or hering prop so it is easily replaceable if it gets damaged, and it isn't hard to match.
    I'd love to try a set of shorties but a pretty big investment without knowing how the boat would run with them. I think I'm going to pull the 2" drive spacers and try a set of 5 blades to start. What type of Hull adjustments can be made to adjust bow/stern lift?
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    #52
    Founding Member / Super Moderator Ratickle's Avatar
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    I'm curious on that too Jason.
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    #53
    Founding Member / Super Moderator Ratickle's Avatar
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    Come on Jason...



    Any tests yet Craig?
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    #54
    Charter Member Coolerman's Avatar
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    You can add some turn downs or widen the strakes on the front pad of the boat to add bow lift, or do the same on the first strake in on the outside chine on the back of the boat to add stern lift.
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    #55
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    Turn down for what?
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    #56
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    Any test information yet?
    Getting bad advice is unfortunate, taking bad advice is a Serious matter!!
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    #57
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    My boat seems to run better downhill
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