Finally getting it dialed in
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 34

Thread:
Finally getting it dialed in

  1. #1
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default Finally getting it dialed in

    Finaly getting it dialed in, let me tell you its a PIA with out data logging. Was all set for last weekends 1000ft radar runs, till race time. The winds put 2 foot chop on the lake, and a direct cross wind, I could not stay hooked, and ultimately spinning out after 350 foot or so. Called it a day, packed up and headed to the launch. The water was ideal, in the river portion of the lake, so the Jet boats make a few exibiton passes for the riverside tavern that has the launch we use. I finally have the Hula dance going, been playing with the diverter up stop. I have it dialed for track conditions, but rather sucks for lake boating. Limiting the roost to just at the surface is proving to be ideal, the boat keeps pulling. My previous settings were what hought to be 3 foot roost were much bigger like 12 footers. Post race video is providing good info, allowing improvements for the next race. I had the roost reduced to about 6 foot on the last race video, but watched my compeditor pulling away from me, once the diverter came up. Once again more diverter adjustment dropped it to less than 2 foot. With my next race event three weeks away, and no place to test, last saturdays passes proved big improvements. Since we race from an idle, a fixed diverter would hurt launch performance, down trim has been needed, to stay with the propped boats on the launch. Making small steps, but making steps none the less. With 300-400 mile tows the norm for race weekends, and Im still having a blast, I don't really miss river boating like I though I would.
    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member Futs's Avatar
    Join Date
    Dec 2007
    Location
    Orange CA, Big River
    Posts
    4,549

    Default

    This thread is useless without pics!!!!!!!

  4. #3
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default

    Quote Originally Posted by Futs View Post
    This thread is useless without pics!!!!!!!



    This one hurts

    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member Futs's Avatar
    Join Date
    Dec 2007
    Location
    Orange CA, Big River
    Posts
    4,549

    Default

    Looks real tight on the launch. Seems to loosen up finally right at the last 100' . What kind of hardware you running and where your plates?

    Is that a hyd or manual diverter chuck?
    Last edited by Futs; 08-27-2012 at 09:39 PM.

  7. #5
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default

    MPD lo pro, MPD hardware 4 deg bc shoe 3/16 above keel, air plate are at zero to the tunnel, Ride plate is at 3 degrees. since the videos were taken the diverter stop has been lowered twice, each time it gets better. diverter is hyd
    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


  8. #6
    Senior Member Futs's Avatar
    Join Date
    Dec 2007
    Location
    Orange CA, Big River
    Posts
    4,549

    Default

    Quote Originally Posted by sleekcrafter View Post
    MPD lo pro, MPD hardware 4 deg bc shoe 3/16 above keel, air plate are at zero to the tunnel, Ride plate is at 3 degrees. since the videos were taken the diverter stop has been lowered twice, each time it gets better. diverter is hyd
    Try the bighting edge of the shoe even or even a 1/16 below. try the plate up at 4 and move the air plates to 1.5* up. That should lossen it up a little bit. What are your pump readings?

    Get on the up as soon as you take a set...looks good though, not shooting to the moon.

    Finally got mine to leave flat and hard, Now she just gives up on the big end...shes a huffing.........
    Last edited by Futs; 08-27-2012 at 09:59 PM.

  9. #7
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default

    The Place diverter is new, Place mini droop, as is the up stop, switched from the American Turbine diverter. It's interesting that less diverter angle is freeing up the boat so much. Can't test at the local river, no water
    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


  10. #8
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,570

    Default

    Quote Originally Posted by sleekcrafter View Post
    The Place diverter is new, Place mini droop, as is the up stop, switched from the American Turbine diverter. It's interesting that less diverter angle is freeing up the boat so much. Can't test at the local river, no water
    the videos are giving you some good info. that thing is way way way too tight, from beginning to end. you're giving up tons of et. you need to loosen this thing up without the nozzle driving the ass into the dirt. do you have a down stop on the diverter? because you need the thing to leave a little more bow up and quit plowing. i'm a big fan of controlling bowrise at the hit, but you have to get the bow up at least a little bit to get the boat on top early. i'd like the see a profile pic of the pump at plate level, and would also like to see what the back of the boat looks like (i forgot).
    way back, didn't you put stacker tanks in behind the seat? are they still in it, and if so, how full are they when you're trying to run the thing?

  11. #9
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default

    BP they are Moon Stackers, very light deal, I run with less than 10 gallons, 5 if permitable. I do not have a down stop yet, I too thinking about it, will devise one asap. When jack machined my lo pro intake, he had my suction and bowl assembly. He said at 5 degrees, the plate would almost touch the bowl. By adding shims to drop the shoe, he said this would open up.
    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


  12. #10
    Senior Member HBInHeat's Avatar
    Join Date
    Jun 2009
    Location
    Huntington Beach, California, United States
    Posts
    1,061

    Default

    5/16 Washers work well as a down stop. Id.start with 6 and start adding from there. Think both tim and I run 8

  13. #11
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,570

    Default

    Quote Originally Posted by HBInHeat View Post
    5/16 Washers work well as a down stop. Id.start with 6 and start adding from there. Think both tim and I run 8
    i have several different thickness shims that i made to set the down stop. thickness would depend on nozzle angle, and nozzle angle would be changed depending on where i set the thrust centerline. i usually set my down stop so the nozzle was at -3.5* or so (sometimes a little more, sometimes a little less), compared to keel. but going from a rolling start, doubt i'd have it down that low - would have to test. bottom line is the bow needs to rise more than it is now to get the boat up and stop plowing like it is.

    sleek, i still want to see a picture of the pump in profile before making any specific suggestions. that the boat is way way way too tight is an observation. in order for the boat to run like it should it needs to be freed up. getting beat by an stv is one thing - getting beat by some deep v fishing boat is a little embarassing...

  14. #12
    "BOATLESS" blender over's Avatar
    Join Date
    Jan 2008
    Location
    Wildomar/Big River/OcotilloWells
    Posts
    3,468

    Default

    Quote Originally Posted by bp298 View Post
    i have several different thickness shims that i made to set the down stop. thickness would depend on nozzle angle, and nozzle angle would be changed depending on where i set the thrust centerline. i usually set my down stop so the nozzle was at -3.5* or so (sometimes a little more, sometimes a little less), compared to keel. but going from a rolling start, doubt i'd have it down that low - would have to test. bottom line is the bow needs to rise more than it is now to get the boat up and stop plowing like it is.

    sleek, i still want to see a picture of the pump in profile before making any specific suggestions. that the boat is way way way too tight is an observation. in order for the boat to run like it should it needs to be freed up. getting beat by an stv is one thing - getting beat by some deep v fishing boat is a little embarassing...
    Looks like a Allison, thoes boats get with the program but are VERY sketchy...

  15. #13
    Boat Nut sleekcrafter's Avatar
    Join Date
    Dec 2007
    Location
    South Elgin, Il.
    Posts
    5,131

    Default

    That little boat runs over 115 mph in 1340" with two stage nitrous, in the video he is in my class, and is running one stage of nitrous. Also the hull was lightened, his starting battery weighs less than three pounds. It's a little 15' Hydrostream, tricked out for racing, his other boat the 17' Hydrostream blew over the week before at 112 mph.


    Back on topic....


    BP I'll dig up some photos.


    Click image for larger version. 

Name:	100_0115.jpg 
Views:	58 
Size:	91.2 KB 
ID:	175498 Click image for larger version. 

Name:	100_0188.jpg 
Views:	55 
Size:	92.7 KB 
ID:	175499\Click image for larger version. 

Name:	101_1367.jpg 
Views:	47 
Size:	91.4 KB 
ID:	175500Click image for larger version. 

Name:	101_1368.jpg 
Views:	55 
Size:	101.0 KB 
ID:	175501Click image for larger version. 

Name:	101_1369.jpg 
Views:	48 
Size:	90.5 KB 
ID:	175502Click image for larger version. 

Name:	101_1370.jpg 
Views:	45 
Size:	91.9 KB 
ID:	175503
    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


  16. #14
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,570

    Default

    what is the angle of that plate compared to the flat spot next to the shoe?

+ Reply to Thread
Page 1 of 3 1 2 3 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in


Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95