Delta pad
+ Reply to Thread
Page 1 of 5 1 2 3 4 ... LastLast
Results 1 to 14 of 62

Thread:
Delta pad

  1. #1
    Senior Member 2savage4you's Avatar
    Join Date
    Dec 2007
    Location
    Bullhead city AZ
    Posts
    1,417

    Default Delta pad

    What is it and what does it do ?

    I keep seeing this pop up every now and then and im just curiouse

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member DuaneHTP's Avatar
    Join Date
    Dec 2007
    Location
    Shell Knob, MO
    Posts
    1,379

    Default

    A delta pad makes a flat surface towards the back center keel line of the boat for an outboard to have a surface to ride on. Works great on a fast bass boat or something like that. Some of the early jets were built that way before they realized that the rounded bottoms worked much better in a jet boat for loading the pump. They can be made to run pretty good. It's just a lot easier to make a fast boat run and load the pump right with a rounded bottom. If it's a boat that runs under 70 MPH, it probably don't make that much difference.

  4. #3
    Senior Member GT Jets's Avatar
    Join Date
    Jun 2008
    Location
    Morgan Hill
    Posts
    2,234

    Default

    From what I was told, they had used the Delta pads on everything from outboards to stern drives and on jets as an attempt to improve the out of the hole performance and lower the planing speed on modestly powered powerboats. They seem to have really gained in popularity when the states started imposing the 35MPH lake speed limits and the fuel crunch...

    They really did not "add" to the performance of the boat as far as the everyday 60 MPH cookie cutter, but when heavily modified had detrimental effects as far as high speed stability (read; chine walk)..

    I totally agree with Duane on the "no worky on the jet hull"...

    I have seen a couple of Bahner jets with the Delta pad and they do seem to stay on plane at a lower speed, but really never noticed anything else that would make me desire a hull wiith a pad.

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member 2savage4you's Avatar
    Join Date
    Dec 2007
    Location
    Bullhead city AZ
    Posts
    1,417

    Default

    They put them in front of the intake right ? do i have a Delta pad ?


  7. #5
    Senior Member GT Jets's Avatar
    Join Date
    Jun 2008
    Location
    Morgan Hill
    Posts
    2,234

    Default

    Quote Originally Posted by 2savage4you View Post
    They put them in front of the intake right ? do i have a Delta pad ?


    Nope, you my freind, are padless

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  8. #6
    mo balls than $cents$ IMPATIENT 1's Avatar
    Join Date
    Dec 2007
    Location
    hugo,okla
    Posts
    11,733

    Default

    nope, you're good, that's a round keel loaders diggin alil deep though, might wanna do something bout that

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

  9. #7
    Senior Member GT Jets's Avatar
    Join Date
    Jun 2008
    Location
    Morgan Hill
    Posts
    2,234

    Default

    If you did have a Delta pad, it would use a flat intake and would look something like this, the red area would taper off as it got toward the front more (about 5-6')....





    GT
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	2 Sav 2.jpg 
Views:	7467 
Size:	15.5 KB 
ID:	52480  
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  10. #8
    Senior Member 2savage4you's Avatar
    Join Date
    Dec 2007
    Location
    Bullhead city AZ
    Posts
    1,417

    Default

    Thanks Glenn






    Quote Originally Posted by IMPATIENT 1 View Post
    nope, you're good, that's a round keel loaders diggin alil deep though, might wanna do something bout that

    I was always wondering how do you know or what do you go by.. I really want to start setting this boat up this next week.. Lots of test runs and what nots.

    Gonna try some runs with a droop with ride plate then some without and i really want to try a snoot to.

    maybe i should start with a rock grate ? and change out that loader.

  11. #9
    Senior Member GRoper's Avatar
    Join Date
    Jun 2009
    Posts
    2,021

    Default

    mostly used on outboard v's if im not mistaken.

  12. #10
    Senior Member GT Jets's Avatar
    Join Date
    Jun 2008
    Location
    Morgan Hill
    Posts
    2,234

    Default

    Quote Originally Posted by 2savage4you View Post
    Thanks Glenn
    No problemo!






    Quote Originally Posted by 2savage4you View Post

    I was always wondering how do you know or what do you go by.. I really want to start setting this boat up this next week.. Lots of test runs and what nots.

    Gonna try some runs with a droop with ride plate then some without and i really want to try a snoot to.

    maybe i should start with a rock grate ? and change out that loader.
    I always start with a factory style rock grate to get a baseline...Otherwise you don't know what changes actually hurt and which help..Just the way I roll...

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  13. #11
    Senior Member 2savage4you's Avatar
    Join Date
    Dec 2007
    Location
    Bullhead city AZ
    Posts
    1,417

    Default

    Quote Originally Posted by GT Jets View Post
    I always start with a factory style rock grate to get a baseline...Otherwise you don't know what changes actually hurt and which help..Just the way I roll...

    GT


    Coolio Now i just have to hunt one down

  14. #12
    Banned
    Join Date
    Aug 2008
    Posts
    742

    Default IMHO "right and wrong".

    Delta pads create 'false rocker', and that makes the hull ride with a 'nose up' attitude. This makes the strakes 'attack' the water at a greater attack angle. (LIFT) Some builders/racers used them on hulls that did not require them, or hulls that could not use them correctly. "Loading the pump" is easily done with a TEAR DROP in front of the intake. (for drag racing) Much of the problem lies in the use of a delta pad on hulls that have shallow V sections (deadrise) This 'false rocker' causes the water from the center to HIT the outer chines and cause 'tail lift' at higher speeds. I know because I set up a 440" injected Chevy BB, Berkeley jet, in a Hondo Pantera 17' 10" hull. It ran 109 MPH and was suffering the 'tail lift' at those speeds, back in 1985. I'd like to see a 1 degree pad on a Rodgers boat, I think it would run very well. Big wide pads do suffer unloading in rough waters, but narrow (enough width for the weight) pads do not.

  15. #13
    Member bakerjet's Avatar
    Join Date
    Oct 2008
    Posts
    43

    Default

    i'm interested in hearing more on the delta pad, my boat has one, 1981 Baker custom boats, gps around 67 and mild bbc power. how fast can it go before i see a loss as far as vs. a round keel. cool floor in tho.

  16. #14
    Senior Member Racer J's Avatar
    Join Date
    Jun 2008
    Location
    Visalia CA
    Posts
    537

    Default

    Quote Originally Posted by GT Jets View Post
    From what I was told, they had used the Delta pads on everything from outboards to stern drives and on jets as an attempt to improve the out of the hole performance and lower the planing speed on modestly powered powerboats. They seem to have really gained in popularity when the states started imposing the 35MPH lake speed limits and the fuel crunch...

    They really did not "add" to the performance of the boat as far as the everyday 60 MPH cookie cutter, but when heavily modified had detrimental effects as far as high speed stability (read; chine walk)..

    I totally agree with Duane on the "no worky on the jet hull"...

    I have seen a couple of Bahner jets with the Delta pad and they do seem to stay on plane at a lower speed, but really never noticed anything else that would make me desire a hull wiith a pad.

    GT
    "No worky on a jet hull" I ran 93 MPH on mine.

+ Reply to Thread
Page 1 of 5 1 2 3 4 ... 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


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