658 Donovan BBC dyno
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 14 of 16

Thread:
658 Donovan BBC dyno

  1. #1
    Senior Member steveo143's Avatar
    Join Date
    Dec 2007
    Location
    Placentia, CA
    Posts
    3,360

    Default 658 Donovan BBC dyno

    Just got home from a very interesting dyno session. Jim Shewbert built the motor from parts mostly supplied by the customer long block wise. This will be going into a 21' Howard daycruiser. 658cuin. Donovan alum. water block. 9.5/1 comp. 50/50 mix 91 and 110 race gas.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_0059.jpg 
Views:	296 
Size:	300.7 KB 
ID:	79574  
    Last edited by steveo143; 11-16-2010 at 06:30 AM.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Feb 2008
    Posts
    274

    Default

    that is a beast of a motor.

  4. #3
    i'm back!! 1QuickCP's Avatar
    Join Date
    Jun 2009
    Location
    Montana
    Posts
    687

    Default

    more boost...lol....like to see it make a pull at 12 lbs or so

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Steady Rollin
    Join Date
    Feb 2008
    Location
    Corona
    Posts
    1,044

    Default

    looks pretty serious steve. would love to see a dyno video if you got one.
    The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
    -- Thomas Jefferson

  7. #5
    Senior Member steveo143's Avatar
    Join Date
    Dec 2007
    Location
    Placentia, CA
    Posts
    3,360

    Default

    Sorry, no video. This thing was a torque monster, [email protected], [email protected] The shortblock parts originally came from government surplus. The complete motors were built for the Navy as naturally aspirated 600hp deals that cost us 100,000.00 each. Crower billet cranks with 3" mains, Crower steel Chrsyler rods, 11.1 deck blocks, Dart 360 heads, etc. The motor on the dyno had customer supplied RHS pro comp chinese heads on it. There are more longblocks available to build.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

  8. #6
    Senior Member TwinTurbo540's Avatar
    Join Date
    Jan 2008
    Location
    spokane, WA
    Posts
    1,164

    Default

    Quote Originally Posted by 1QuickCP View Post
    more boost...lol....like to see it make a pull at 12 lbs or so
    Exactly!!!
    I like my women like I like my boats......Fast and ready to get wet at all times!!

  9. #7
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    10,072

    Default

    Quote Originally Posted by steveo143 View Post
    Sorry, no video. This thing was a torque monster, [email protected], [email protected] The shortblock parts originally came from government surplus. The complete motors were built for the Navy as naturally aspirated 600hp deals that cost us 100,000.00 each. Crower billet cranks with 3" mains, Crower steel Chrsyler rods, 11.1 deck blocks, Dart 360 heads, etc. The motor on the dyno had customer supplied RHS pro comp chinese heads on it. There are more longblocks available to build.
    Wow...........


    That baby makes some trq.

    S CP

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

  10. #8
    Senior Member steveo143's Avatar
    Join Date
    Dec 2007
    Location
    Placentia, CA
    Posts
    3,360

    Default

    Quote Originally Posted by 1QuickCP View Post
    more boost...lol....like to see it make a pull at 12 lbs or so
    12lbs would be +/- 1600 on both trq. and hp.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

  11. #9
    Super Moderator HammerDown's Avatar
    Join Date
    Dec 2007
    Location
    The Right Coast/SE-PA
    Posts
    5,488

    Talking

    Quote Originally Posted by Sleeper CP View Post
    Wow...........


    That baby makes some trq.

    S CP
    Torque means nothing in a Jet Boat...MikeT made me say it
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  12. #10
    Senior Member
    Join Date
    Mar 2008
    Location
    San Diego
    Posts
    1,535

    Default

    Quote Originally Posted by steveo143 View Post
    Sorry, no video. This thing was a torque monster, [email protected], [email protected] The shortblock parts originally came from government surplus. The complete motors were built for the Navy as naturally aspirated 600hp deals that cost us 100,000.00 each. Crower billet cranks with 3" mains, Crower steel Chrsyler rods, 11.1 deck blocks, Dart 360 heads, etc. The motor on the dyno had customer supplied RHS pro comp chinese heads on it. There are more longblocks available to build.

    Sounds like old HSB stuff. When I was there , they ran 557ci. in. Innovation Marine motors making 620hp NA. Great motors and damn reliable.


    Darrell.
    San Diego.

    28ft Sportcat
    With Twins

  13. #11
    Senior Member TwinTurbo540's Avatar
    Join Date
    Jan 2008
    Location
    spokane, WA
    Posts
    1,164

    Default

    Quote Originally Posted by steveo143 View Post
    12lbs would be +/- 1600 on both trq. and hp.
    Its going to pick up 650-700 from 6 to 12 lbs.....?? I sure would like to see it, why did they stop at 6?
    I like my women like I like my boats......Fast and ready to get wet at all times!!

  14. #12
    Senior Member steveo143's Avatar
    Join Date
    Dec 2007
    Location
    Placentia, CA
    Posts
    3,360

    Default

    Quote Originally Posted by TwinTurbo540 View Post
    Its going to pick up 650-700 from 6 to 12 lbs.....?? I sure would like to see it, why did they stop at 6?
    Going from 4.2 to 5.9 on boost gained 130 lbs. trq. Ran out of pulleys to change and customer was happy.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

  15. #13
    Senior Member
    Join Date
    Jan 2008
    Posts
    103

    Default Where

    Where would one find additional longblocks to Build? I have been seriously considering building a big N/A motor, sounds like a good starting point.

  16. #14
    Senior Member steveo143's Avatar
    Join Date
    Dec 2007
    Location
    Placentia, CA
    Posts
    3,360

    Default

    Quote Originally Posted by LD Mandella View Post
    Where would one find additional longblocks to Build? I have been seriously considering building a big N/A motor, sounds like a good starting point.
    I have bought the remaining pieces, enough to build 4 more motors. Jim Shewbert will build anything you want.
    steveo143 AKA DiMarco 21 II



    Now totally Green on E-85, saving the world one ear of corn at a time!
    RIP Davey B and Denis and Chris and Bob GN7

+ Reply to Thread
Page 1 of 2 1 2 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