A Question Of Induction?
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A Question Of Induction?

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    Senior Member holorinhal's Avatar
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    Default A Question Of Induction?

    I need a little advice on what type (Tunnell ram/single plane) ,and brand (Edelbrock,Wieand,Holley,Dart)of intake manifold and what size cfm carburator ,works well on a jet?

    A little about the engine that I am putting together.

    454 BBC,solid roller, bored 30 over ,4.25" forged stroker crank,for 489 C.I.D.

    Forged SRP small dome piston's with about 10:1 CR.

    049 iorn oval port heads mild porting and 2.19/1.88 valves. Do not have flow numbers for these head's.

    Comp cam's ,Marine mechanical roller camshaft, grnd# 360ar-10, 4500-7000rpm range.
    DURATION; 271/282@ .050"
    LIFT;.680 in/.680 ex
    LSA; 110*

    Possibly a single stage NOS system.

    Setback Berk 12jg/"B" impellor.

    What intake/carb setup might work best for this combo? Thank's....Hal
    Last edited by holorinhal; 04-30-2008 at 06:44 PM.

    I'm not here for a long time, I'm just here for a good time!
    If your not on the edge.......your taking up too much room......Drive it like you stole it!

    73 KONA Restoration http://www.performanceboats.com//showthread.php?t=10678
    '81 Spectra 20 Facelift http://www.performanceboats.com/user...-facelift.html

    18' Advantage http://www.performanceboats.com/jet-...k-project.html

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  3. #2
    jetboataholic HawaiianJet's Avatar
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    You might get a little more response on this in the "On the Dyno" section. That is where a lot of the engine builders hang out. 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.

  4. #3
    Senior Member holorinhal's Avatar
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    What, no opinion's?

    I'm not here for a long time, I'm just here for a good time!
    If your not on the edge.......your taking up too much room......Drive it like you stole it!

    73 KONA Restoration http://www.performanceboats.com//showthread.php?t=10678
    '81 Spectra 20 Facelift http://www.performanceboats.com/user...-facelift.html

    18' Advantage http://www.performanceboats.com/jet-...k-project.html

  5. #4
    jetboataholic HawaiianJet's Avatar
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    Arrow "On the Dyno" Section

    The engine builders mostly hang out in the "On the Dyno" section!!! Post it there!!! They will chime in for sure and give you great suggestions over there. I created a Horsepower estimation thread over there and got 46 replies and 578 views!!!!!!!!!!

    I would run a Weiand Team G and a Holley 850 or something like that. But I am by absolutely no means an expert on this or really anything that has to do with boats or motors. I've heard, "jets like big carbs", so a tunnel ram with dual Holleys on top would probably be an even better combination. But again I don't know much about this stuff. I guess it all depends on how much money you're willing to spend and how much you are looking to get out of your motor. Hope this helps.
    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.

  6. #5
    Senior Member hotbo's Avatar
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    Quote Originally Posted by holorinhal View Post
    What, no opinion's?
    here is my .02cents worth.

    dart single plane oval port intakeor brodix intake either are top shelf pieces

    at least a 850 but better with a dominator,or you could get a custom built carb to your specs built,we have used biggs performance products several times been very happy with there custom carbs,anyway

    if you would have posted in the dyno forum been quicker repsonces but they will see it and come


    the heads are really gonna hold you back imo with a 4.25 stroke, and the cam profile that mutha is gonna want air and lots of it.well forgot my train of thought oh well,good luck travis

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    Senior Member hotbo's Avatar
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    the biggest issue is you wil get 100s of opinoins on this subject about t-ram or single carb.

    50 percent will say t-ram it
    50 percent will say single carb it

    or hell i might be totally off,but im no t-ram man and im stickin with it.


    big singlecarb tall single plain intake,and it will do just as good if not better than any t-ram motor promise

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    Razor Wire Militia קmᮆÚ's Avatar
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    Quote Originally Posted by holorinhal View Post
    I need a little advice on what type (Tunnell ram/single plane) ,and brand (Edelbrock,Wieand,Holley,Dart)of intake manifold and what size cfm carburator ,works well on a jet?

    A little about the engine that I am putting together.

    454 BBC,solid roller, bored 30 over ,4.25" forged stroker crank,for 489 C.I.D.

    Forged SRP small dome piston's with about 10:1 CR.

    049 iorn oval port heads mild porting and 2.19/1.88 valves. Do not have flow numbers for these head's.

    Comp cam's ,Marine mechanical roller camshaft, grnd# 360ar-10, 4500-7000rpm range.
    DURATION; 271/282@ .050"
    LIFT;.680 in/.680 ex
    LSA; 110*

    Possibly a single stage NOS system.

    Setback Berk 12jg/"B" impellor.

    What intake/carb setup might work best for this combo? Thank's....Hal
    you want most HP of best fuel economy?? what are you trying to achieve with it??

    you want the most HP then a TR with 2 600's if you want the best you can get but better fuel economy then go with a victor series single plain by Edelbrock with a nice 850 DP

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    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by קmᮆÚ View Post
    you want most HP of best fuel economy?? what are you trying to achieve with it??

    you want the most HP then a TR with 2 600's if you want the best you can get but better fuel economy then go with a victor series single plain by Edelbrock with a nice 850 DP
    What's "DP" stand for? Double Pumper?
    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.

  10. #9
    Senior Member holorinhal's Avatar
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    Quote Originally Posted by קm†šš View Post
    you want most HP of best fuel economy?? what are you trying to achieve with it??

    you want the most HP then a TR with 2 600's if you want the best you can get but better fuel economy then go with a victor series single plain by Edelbrock with a nice 850 DP

    I am looking for most HP. I am trying to build a decent runner.

    Yes HJ, DP is double pumper...H

    I'm not here for a long time, I'm just here for a good time!
    If your not on the edge.......your taking up too much room......Drive it like you stole it!

    73 KONA Restoration http://www.performanceboats.com//showthread.php?t=10678
    '81 Spectra 20 Facelift http://www.performanceboats.com/user...-facelift.html

    18' Advantage http://www.performanceboats.com/jet-...k-project.html

  11. #10
    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by holorinhal View Post
    I am looking for most HP. I am trying to build a decent runner.

    Yes HJ, DP is double pumper...H
    Put a blower on it then!
    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.

  12. #11
    Senior Member hotbo's Avatar
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    [quote=holorinhal;154633]I am looking for most HP. I am trying to build a decent runner.
    well if you want to go t-ram why not 2 750s or 850s
    the dart or brodix single plane intake will beat any other intake hands down,single plain.

    i have had many charts and peeps tell me t-rams will make more power well ive sure seen alot of them lose against single carb motors,maybe there setup.

    your mill is not that big so either way will be productive of what you want

  13. #12
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    Quote Originally Posted by holorinhal View Post
    I need a little advice on what type (Tunnell ram/single plane) ,and brand (Edelbrock,Wieand,Holley,Dart)of intake manifold and what size cfm carburator ,works well on a jet?

    A little about the engine that I am putting together.

    454 BBC,solid roller, bored 30 over ,4.25" forged stroker crank,for 489 C.I.D.

    Forged SRP small dome piston's with about 10:1 CR.

    049 iorn oval port heads mild porting and 2.19/1.88 valves. Do not have flow numbers for these head's.

    Comp cam's ,Marine mechanical roller camshaft, grnd# 360ar-10, 4500-7000rpm range.
    DURATION; 271/282@ .050"
    LIFT;.680 in/.680 ex
    LSA; 110*

    Possibly a single stage NOS system.

    Setback Berk 12jg/"B" impellor.

    What intake/carb setup might work best for this combo? Thank's....Hal
    if you're goin 4150 carb, look at the new team g's and 950hp's

  14. #13
    Razor Wire Militia קmᮆÚ's Avatar
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    Quote Originally Posted by hotbo View Post
    well if you want to go t-ram why not 2 750s or 850s
    well I think 2 750's or 850's are way to big..

    my 496 for example with AFR heads and alot bigger cam only needs 915 CFM but i chose to go with a TR so I went with the 600's , why over carb it and jet it down out of the carbs range when you can go with a smaller carb and stay more in its jetting range. more fuel dosent always mean more HP without a huffer or turbo's its just a waste IMO..

  15. #14
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by קmᮆÚ View Post
    well I think 2 750's or 850's are way to big..

    my 496 for example with AFR heads and alot bigger cam only needs 915 CFM but i chose to go with a TR so I went with the 600's , why over carb it and jet it down out of the carbs range when you can go with a smaller carb and stay more in its jetting range. more fuel dosent always mean more HP without a huffer or turbo's its just a waste IMO..
    yep especially with today's fuel prices

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