454 cam
+ Reply to Thread
Results 1 to 11 of 11

Thread:
454 cam

  1. #1
    Member
    Join Date
    Feb 2010
    Posts
    80

    Default 454 cam

    I am currently looking to purchase a 454 for my jetboat that I am renovating! I was wondering what's the best cam to have in it? Here's the specs what u think? i454 BBC (361959) .040” over

    GM Oval port heads upgraded with comp cams valve springs #911-16

    9.04:1 Sealed Power hypereutectic pistons

    GM forged crankshaft

    ARP rod bolts

    Comp cams camshaft 11-246-3 (XE274H)

    Edelbrock Performer 2-O intake #2161

    Cloyes double roller timing set.

    Long water pump

    Mechanical fuel pump

    12SI alternator and brackets

    Choice of large cap or small cap HEI


    Never dyno tested but based on similar builds it should make approximately 450HP and well over 500 ft-lbs of torque

    I ran this engine for 4 years and put on approximately 60,000 miles. Strong runner no issues

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Some guy obnoxious001's Avatar
    Join Date
    Dec 2007
    Posts
    3,570

    Default

    Quote Originally Posted by DSDANO View Post
    I am currently looking to purchase a 454 for my jetboat that I am renovating! I was wondering what's the best cam to have in it? Here's the specs what u think? i454 BBC (361959) .040” over

    GM Oval port heads upgraded with comp cams valve springs #911-16

    9.04:1 Sealed Power hypereutectic pistons

    GM forged crankshaft

    ARP rod bolts

    Comp cams camshaft 11-246-3 (XE274H)

    Edelbrock Performer 2-O intake #2161

    Cloyes double roller timing set.

    Long water pump

    Mechanical fuel pump

    12SI alternator and brackets

    Choice of large cap or small cap HEI


    Never dyno tested but based on similar builds it should make approximately 450HP and well over 500 ft-lbs of torque

    I ran this engine for 4 years and put on approximately 60,000 miles. Strong runner no issues
    Not sure I understand, looks like you are listing specs for an engine you are considering purchasing,, not asking about a cam for an engine you are building? Since the specs include "long water pump", I should mention that marine engines usually are built with additional piston to wall clearance, and more attention to rod and main bearing clearances since they are expected to run higher rpm than "street" vehicles.

  4. #3
    Member
    Join Date
    Feb 2010
    Posts
    80

    Default

    Haha it was a little late when I wrote that guess I wasn't very clear sorry. I pmd you. Guess what I was trying to show was the specs of the engine and what cam it had in it see if that would work.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member EVILFORCE's Avatar
    Join Date
    Oct 2009
    Posts
    5,180

    Default

    Need a bigger cam. That only has 5.5 lift. Duration not long enough either. Get something about .650 lift and 300 duration.
    No Fool Like A Old Fool is there?

  7. #5
    Senior Member CK7684's Avatar
    Join Date
    Aug 2008
    Location
    Minnesota
    Posts
    550

    Default

    It's going to depend on what you expect from the engine...many of the the opinions from the members on this site may also be based on higher power applications than the average joe...and remember the HP costs $$$...

    Other things to consider would be what type of exhaust you will be using which will affect camshaft selection. Cam selection will affect valvespring selection, and so on...

    More info on what you want to build would be useful...

  8. #6
    Living in a cage of fear thatguy's Avatar
    Join Date
    May 2008
    Location
    Redding, CA
    Posts
    16,453

    Default

    I ran this Hyd. flat tappet in a very similar build, but with Brodix SMALL 280cc square port heads.
    (119cc Chambers) 9.5:1 CR. on 91 pump gas.

    http://www.summitracing.com/parts/CCA-11-240-4/

    I Liked it, but when I broke the engine I replaced it with this Hyd. roller.

    http://www.summitracing.com/parts/CCA-11-456-8/

    WAY better power in the same engine configuration. Pulls an "A" impeller HARD past 5500 RPM in the Miller Jet.
    Idles at 1100 or so.
    Tommy
    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
    "So as through a glass, and darkly
    The age long strife I see
    Where I fought in many guises,
    Many names, but always me."

    Gen. George S Patton

  9. #7
    Member
    Join Date
    Feb 2010
    Posts
    80

    Default

    Well this is my first jetboat. Its a 77 Tahiti with a jaquzzi WJ in it. No motor. It had a 460 in it before but I like chev more so I have bought Hardin plates and a driveline for a BBC, just need the motor now. I was just going to run a set of bassett headers with waterlines on it for the exhaust. I didnt know there was soo much that went into the engines. Although I want this thing to really scream I dont have a ton of money. The engine I mentioned the guy is asking 2800.00 for I was going to offer him 2500.00 for it i thought it would be a base to start with and I could trick it up from there. I am still in the process of painting the boat and getting the seats done right now. Kinda doing everything myself just to have that satisfaction. thanks guys

  10. #8
    Purple headed member Quickjet's Avatar
    Join Date
    Dec 2007
    Location
    Menifee
    Posts
    7,646

    Default

    Put the engine in the way it is and leave it alone. That boat/pump combo will respond very little (if at all) to engine upgrades so save yourself some time and money and just enjoy what you have. After the "Jetboat" bug has bit you hard enough and you've learned a bit more, then just upgrade to a more efficient hull design with a better pump and then worry about the engine. In the meantime, mash on it the way it is and save save save!!!!
    Quote Originally Posted by thatguy View Post
    I used to believe QJ was a gay black man..

    Quote Originally Posted by Havasu Secret View Post
    Keith...
    Real Fast Big Blocks are always V-Drives

  11. #9
    Member
    Join Date
    Feb 2010
    Posts
    80

    Default

    the only shitty thing is it didnt come with the engine soo I still have to buy that! Is the Tahiti hull not a good one?

  12. #10
    Purple headed member Quickjet's Avatar
    Join Date
    Dec 2007
    Location
    Menifee
    Posts
    7,646

    Default

    Quote Originally Posted by DSDANO View Post
    the only shitty thing is it didnt come with the engine soo I still have to buy that! Is the Tahiti hull not a good one?
    Nothing wrong with the Tahiti as long as you use it for it's original intention, an entry level mild lake/ski boat with limited performance abilities.
    A friend of mine had an one about 5 years ago with a somewhat stout (for an Olds) 455 that Dynoed just over 575 hp. Funny thing is, in the Tahiti it never saw over 72 mph. Just for comparison, my Bahner had a very mellow 454 that I plucked out of a burned Suburban, threw a set of 990's on it with a tunnel ram and ran 83 mph. It was maybe making 500 hp and ran on 87 octane. I know it's an "Apples and Oranges" comparrison but I think it holds some validity.
    Anyways, if you are looking to get into boating, it can be a good stepping stone. On on the flip side, if the boat is a pile of shit it might deter you from ever buying another one and your first boat experience might be your last.
    I always think that the first boat you buy should be the clean, reliable and have the ability to grow with you as your need for speed increases. Yes they cost a bit more initially however they save you thousands in the long run.
    Quote Originally Posted by thatguy View Post
    I used to believe QJ was a gay black man..

    Quote Originally Posted by Havasu Secret View Post
    Keith...
    Real Fast Big Blocks are always V-Drives

  13. #11
    Senior Member CK7684's Avatar
    Join Date
    Aug 2008
    Location
    Minnesota
    Posts
    550

    Default

    My hull is basically a Tahiti (16ft) splash. It's a good all 'round hull, but yeah, not exactly built for high speed. Mine is perfect for what I want right now...

+ Reply to Thread

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