loader tuning
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loader tuning

  1. #1
    SLOW MEMBER slowboy's Avatar
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    Default loader tuning

    So I put a closed center loader with longer ramps into my boat to see if it would be better than the open center loader that was in it. I really like how the boat handles, with the diverter all the way down, feels real loose and does not porpous at all. The front could be a little higher, as it is riding a little wetter than I would like. If I put the diverter up one click, it porpouses very bad. I have never really gotten this boat to take a nice set.....Yet.

    The boat is a 18 foot mako, delta bottom, dominator pump, 1/4 inch shoe, pump is set way back, handhole cover is outside the boat. It has a droop, diverter and one small wedge and a ride plate that is pretty much set all the way up. It also has a nozzle insert in it, I believe it is the blue one.

    With my old loader, we were having problems getting pump inlet pressures above 20 psi, just couldnt do it, not even with a 5/8 shoe. With the new loader, our pump inlet pressures were around 35-38 psi with the 1/4 shoe. I think this is a good thing? The engine is a sbc 388 with an intercooled blower on it, spinning a b impeller 6000-6100 rpms at 84-85 miles per hour. I know it will run better if I can just get it to take a set already. With the diverter down, where it does not porpous, there is zero roost.

    Where would be a good place to start, should I try the larger shoe? Last time I had it on, the boat road really really wet. Or should I mess with the ride plate for starters?

    I am still learning with this but do seem to be making some progress, and I think my hull really likes this loader.

    Thanks, Ryan
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

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  3. #2
    Senior Member ol guy's Avatar
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    Quote Originally Posted by slowboy View Post
    So I put a closed center loader with longer ramps into my boat to see if it would be better than the open center loader that was in it. I really like how the boat handles, with the diverter all the way down, feels real loose and does not porpous at all. The front could be a little higher, as it is riding a little wetter than I would like. If I put the diverter up one click, it porpouses very bad. I have never really gotten this boat to take a nice set.....Yet.

    The boat is a 18 foot mako, delta bottom, dominator pump, 1/4 inch shoe, pump is set way back, handhole cover is outside the boat. It has a droop, diverter and one small wedge and a ride plate that is pretty much set all the way up. It also has a nozzle insert in it, I believe it is the blue one.

    With my old loader, we were having problems getting pump inlet pressures above 20 psi, just couldnt do it, not even with a 5/8 shoe. With the new loader, our pump inlet pressures were around 35-38 psi with the 1/4 shoe. I think this is a good thing? The engine is a sbc 388 with an intercooled blower on it, spinning a b impeller 6000-6100 rpms at 84-85 miles per hour. I know it will run better if I can just get it to take a set already. With the diverter down, where it does not porpous, there is zero roost.

    Where would be a good place to start, should I try the larger shoe? Last time I had it on, the boat road really really wet. Or should I mess with the ride plate for starters?

    I am still learning with this but do seem to be making some progress, and I think my hull really likes this loader.

    Thanks, Ryan
    You may want to look at the bottom before making any more r/p and shoe changes! If you have a large hook in the bottom trying to drive the bow down you could have a ride by hull and ride by intake fight and it will be a fight that you will never win!!!! Straight edge the bottom and that will tell the story. Manufactures build boats for a good ride and if you try to free the boat up with out working the last 4-5 feet it is a costly and never ending battle. M

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    Have you tried taking the droop off?

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  6. #4
    SLOW MEMBER slowboy's Avatar
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    The bottom of the boat is flat, I had the boat upside down after I put new stringers in it, and spent some time on it.

    I have not tried taking off the droop, but have thought about it.
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    Some boats like them some boats don't, have heard of them causing probs before. Of course who knows if a short droop will work better or a straight snoot might work its all trial and error. I would start by just removing it and see if it helps at least it won't cost anything but time.

  8. #6
    What the Hell is That? 72Hondo's Avatar
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    Ask Shoemaker. I think he is the setup guru
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

  9. #7
    Boat Nut sleekcrafter's Avatar
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    What degree is youe ride plate set to? Blockers are used to give lift and make the boat think it's got more ponies (more RPM's)
    Upper Midwest Power Boat Association
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  10. #8
    B1 Racing cs19's Avatar
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    35 psi is good compared to your old numbers. Having to lay the boat over with your diverter to avoid the porpoise is killing you. You should have a 4-5 ft. roost.

    I would try and eliminate the porpoise with the droop,etc. on the boat, in the long run its probably something you will want on the boat. Moving weight around in the boat would be a fix for the porpoise but its always hard to move things around, try less rideplate angle, that still probably wont fix it, Id be looking into a small set of trim tabs if you cant get rid of it by working on the setup.
    B1Racing.net

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    SLOW MEMBER slowboy's Avatar
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    I do have some weight in the boat, there are a pair of 12 inch subs under the front, as well as a couple of amps. This is lake boat and tunes are needed for the sandbar.


    I am going to try a drastic change on the ride plate today, just to see if the boat handles different, I know in the past, it has not, but maybe with this new loader things will be different.

    I will say though, with the diverter down, this boat has never rode so nice, but you can definatley feel the boat loosen up and pick up speed when you raise the diverter up a notch or two. The boat has always run the fastest with the roost about 4-5 feet high. You can feel it slow down when it comes down on the porpous, killing speed. Thanks for the input, I really appreciate it.

    Ryan
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

  12. #10
    SLOW MEMBER slowboy's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    What degree is youe ride plate set to? Blockers are used to give lift and make the boat think it's got more ponies (more RPM's)

    I cant remember the exact degree it is set to, and would have to check it with my angle finder, but I do know that it is all the way up right now. If I was to guess I would say 8-10 degrees up. This was where it rode the best last year.
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

  13. #11
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    Default rideplate

    Should be 3-4 degrees, after that it will keep trying to rock up on the ride plate at speed, then fall down. Pat

  14. #12
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    Quote Originally Posted by slowboy View Post
    The bottom of the boat is flat, I had the boat upside down after I put new stringers in it, and spent some time on it.
    do you have any pictures of the bottom on the boat? You state the bottom of boat is flat but how about the next set of outside strakes?
    ted

  15. #13
    SLOW MEMBER slowboy's Avatar
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    I wet sanded the bottom from the area where I started in this picture, down to the first ridge, and all the way to the back of the boat. Then speedcoated that area.


    This is when it was in primer, I blocked it out from the center skag, (should have removed it) all the way back, it is completly flat with no hook or rocker.


    Last edited by slowboy; 06-12-2009 at 10:27 AM.
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  16. #14
    Senior Member flat screwd's Avatar
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    I may be talking out of place here but I feel that your bottom desing is not going to give good results with a lot of bow lift. I feel that without the spoon the loaders with too deep of lift ramp will only block the shoe.

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