Intake / Head question
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 31

Thread:
Intake / Head question

  1. #1
    Senior Member Bigblockbill's Avatar
    Join Date
    Dec 2007
    Location
    Albuquerque, NM
    Posts
    385

    Default Intake / Head question

    Ok, so putting together a tall deck motor with heads and a block that came used and from different sides of the earth. Long story short, the intake does not fit. After very quickly looking at the block deck height it seems ok relevant to the pistons, so I am guessing the heads have been angle milled or cut. (Note the intake is a new dart tall deck intake)

    When I set the intake on the block with no gaskets it rests on the front and rear valley ribs. I can push the intake over to one side and can measure just under a 1/4 gap on the other side.

    I then lifted the intake and set some thin cardboard under the front and rear ribs and centered the intake between the heads. I could then measure around .150-.160" between the intake and heads on each side, again with no gaskets installed.

    Help, where do I go from here?
    24' Eliminator Fundeck

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Gone
    Join Date
    Dec 2007
    Location
    Sparks, Nevada
    Posts
    1,824

    Default

    You are losing me. It appears like the manifold is not wide enough for this assembly?
    When you mill...decks, heads, etc.....you are narrowing.
    So...
    Be sure head gaskets are in place.
    Set the intake on with the intake gaskets......they are about .060 thick each side. If you don't have any gaskets then use a .060 valve spring shim each side and end. Mock it up that way and see what you have.
    By the way...intake gaskets .125 thick are available.

  4. #3
    Senior Member VAMI's Avatar
    Join Date
    Jul 2008
    Location
    srq,florida
    Posts
    282

    Default

    You sure they sent you tall deck intake?

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,275

    Default

    Sounds like you have a standard deck intake. Measure across the flat of the end sealing surface. Standard deck is about 6 5/16".
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  7. #5
    Senior Member
    Join Date
    Jan 2008
    Posts
    167

    Default

    This engine is a project bigblockbill and I are working on, so I will throw in some info too. The intake is supposed to be for a tall deck. The distributor hole is machined down .400 so you can use a standard distributor on it on a tall deck engine.

    block is a Merlin II
    heads are Merlin Iron 315/320s I got from a member here on the boards.
    intake is a new Dart Intake

    Here is a link to some pictures we posted for help over on dartheads.com:

    http://www.dartheads.com/dartboard/showthread.php?t=290

    I am unable to post the pictures here because the pics aren't on my computer. Maybe Bill can upload them.

    Any help would be appreciated. Thanks!


  8. #6
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,275

    Default

    It wouldn't surprise me at all to find that you have a tall deck intake that's had too much taken off the flanges, especially from dart, OR- they machined the dist pad on a standard intake. Either way, it dosen't fit. Send it back and get the right one. You've already wasted more time on this than you should have had to.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  9. #7
    Some guy obnoxious001's Avatar
    Join Date
    Dec 2007
    Posts
    3,571

    Default

    Quote Originally Posted by Airin' it Out View Post
    This engine is a project bigblockbill and I are working on, so I will throw in some info too. The intake is supposed to be for a tall deck. The distributor hole is machined down .400 so you can use a standard distributor on it on a tall deck engine.

    block is a Merlin II
    heads are Merlin Iron 315/320s I got from a member here on the boards.
    intake is a new Dart Intake

    Here is a link to some pictures we posted for help over on dartheads.com:

    http://www.dartheads.com/dartboard/showthread.php?t=290

    I am unable to post the pictures here because the pics aren't on my computer. Maybe Bill can upload them.

    Any help would be appreciated. Thanks!

    Apparently you can't view photos on the dartboard without signing up, so no easy way to see those photos. If I could see clear photos, I might have an answer.

  10. #8
    Gone
    Join Date
    Dec 2007
    Location
    Sparks, Nevada
    Posts
    1,824

    Default

    Yeah no pictures.
    But...I am thinking:
    " I could then measure around .150-.160" between the intake and heads on each side, again with no gaskets installed."

    If this were a low deck manifold he got by mistake....and since spacer plates to put a low deck manfold on a tall deck are .375 thick each side....seems there is something else going on.

  11. #9
    Senior Member Bigblockbill's Avatar
    Join Date
    Dec 2007
    Location
    Albuquerque, NM
    Posts
    385

    Default

    Quote Originally Posted by steelcomp View Post
    Sounds like you have a standard deck intake. Measure across the flat of the end sealing surface. Standard deck is about 6 5/16".
    Does anyone know what it would be for a tall deck intake? Its kind of a subjective measurement but the one I have hear that does not fit is about 6 1/2 plus or minus .050 depending on where I go.

    Is there any other measurements I could make that might tell me if this intake has been cut down?
    24' Eliminator Fundeck

  12. #10
    Gone
    Join Date
    Dec 2007
    Location
    Sparks, Nevada
    Posts
    1,824

    Default

    I just went out and measured the end of a BDS tall deck blower manifold and it was 6.925.

  13. #11
    jetboataholic HawaiianJet's Avatar
    Join Date
    Mar 2008
    Location
    Lexington, KY
    Posts
    2,798

    Default

    Quote Originally Posted by Bigblockbill View Post
    Does anyone know what it would be for a tall deck intake? Its kind of a subjective measurement but the one I have hear that does not fit is about 6 1/2 plus or minus .050 depending on where I go.

    Is there any other measurements I could make that might tell me if this intake has been cut down?
    It sounds like it is a bad intake because those gaps you stated are far too small. I would send it back and have them send you another correct one.

    Pictures would really, really help!!!!! I'm not signing up to another website to view your pictures, so please post them up here!!!

    Good luck.
    HJ

    ***FOR SALE*** 1978 19' Full Stringer Hawaiian Molokai Jet Boat w/ Berkeley 12JC-AB and Chevy 440 Tall Deck ***FOR SALE***

    Quote Originally Posted by mako shark mark View Post
    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

  14. #12
    Senior Member Bigblockbill's Avatar
    Join Date
    Dec 2007
    Location
    Albuquerque, NM
    Posts
    385

    Default

    Sounds like we have a bad intake. It came from ebay and sold as new and never installed a while back... guess that does not mean it was not modified first... or not good to start with... bummer.


    Here are some pics.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	P1010002.jpg 
Views:	104 
Size:	90.3 KB 
ID:	15097   Click image for larger version. 

Name:	P1010003.jpg 
Views:	103 
Size:	97.5 KB 
ID:	15098   Click image for larger version. 

Name:	P1010004.jpg 
Views:	278 
Size:	96.1 KB 
ID:	15099   Click image for larger version. 

Name:	P1010194.jpg 
Views:	99 
Size:	92.1 KB 
ID:	15100  
    24' Eliminator Fundeck

  15. #13
    Gone
    Join Date
    Dec 2007
    Location
    Sparks, Nevada
    Posts
    1,824

    Default

    Make spacers. Nothing is supposed to fit anyway. It's the hard that makes it great.
    Double your gaskets up......that will make them .125 thick. Check your port match.
    Maybe a .125 gasket each side (which are available) will get it. If not make your own gaskets or spacers. On the ends just use silicone to seal.
    It's done all the time.....ain't no big deal.

    Does look like a tall deck due to the thick flanges.
    Last edited by Fiat48; 07-29-2008 at 09:43 PM.

  16. #14
    jetboataholic HawaiianJet's Avatar
    Join Date
    Mar 2008
    Location
    Lexington, KY
    Posts
    2,798

    Default

    Quote Originally Posted by Bigblockbill View Post
    Sounds like we have a bad intake. It came from ebay and sold as new and never installed a while back... guess that does not mean it was not modified first... or not good to start with... bummer.


    Here are some pics.
    They sell factory rejects on eBay. It's always risky buying parts on eBay. So I guess you cant really send it back, since you bought it on eBay.

    Do like Fiat said and use thick gaskets to fill in the gap. If it were a short deck intake, there would be a 3/8" gap on either side of the intake.

    Good luck.
    HJ

    ***FOR SALE*** 1978 19' Full Stringer Hawaiian Molokai Jet Boat w/ Berkeley 12JC-AB and Chevy 440 Tall Deck ***FOR SALE***

    Quote Originally Posted by mako shark mark View Post
    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

+ 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