ok so whats everyone think about small block vs big block?
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ok so whats everyone think about small block vs big block?

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    Member MRUSER's Avatar
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    Default ok so whats everyone think about small block vs big block?

    I am trying to decide what i want to run sbc 400 pushing around 450hp or a slightly built 454? I had one more motor in mind but its going to cost more money than i thought to build (blown 350) not sure how it would run with a boat that i want to go fast in but when it comes time to take friends and family out do a litttle tubing? so what would be the motor of choice?

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    Sit N' Spin Jetaholic's Avatar
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    No replacement for displacement...454 hands down.



    Quote Originally Posted by HammerDown
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    21 Daytona Outlaw's Avatar
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    what boat/hull and pump??
    #55

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    Boss of the McIntyre Mob danhercules's Avatar
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    How much TQ can you get out of the small block. I would love to see it, I like seeing different things.


    Very first TPR 21' Deck. 528 BBF 736hp on pump gas built by High Flow Dynamics

    McIntyre Mob. Where the rejects play!

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    i'm back!! 1QuickCP's Avatar
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    Did a blown gas 434 smallblock for a 19 foot CP open bow..motor dynoed at 987 hp on C12...boat ran right at 100 at 3500 ft...nice setup but about 3 times the cost of a 575 that would have done the same thing on av gas....IMHO....

    Very cool tho...and got the looks

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    Super Moderator HammerDown's Avatar
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    Thumbs up

    My BFF MikeT will tell ya...for jet boats >it's NOT about torque ...it's ALL about HP !
    PS...when he responds to this and mentions, Big Blocks and torque is for fags, don't take it personal.



    Oh, and my other BFF Wet Dream told me to post the above.
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  9. #7
    What the Hell is That? 72Hondo's Avatar
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    I run A blown Small block,



    Parts are a lot cheaper for SB than they are with BB if that helps any.
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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by MRUSER View Post
    I am trying to decide what i want to run sbc 400 pushing around 450hp or a slightly built 454? I had one more motor in mind but its going to cost more money than i thought to build (blown 350) not sure how it would run with a boat that i want to go fast in but when it comes time to take friends and family out do a litttle tubing? so what would be the motor of choice?
    I think it would be the cat's ass with the right boat and right combo of parts.
    Dare to be different

    S CP
    Big Inch Ford Lover

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
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    Senior Member GT Jets's Avatar
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    Quote Originally Posted by HammerDown View Post
    My BFF MikeT will tell ya...for jet boats >it's NOT about torque ...it's ALL about HP !
    PS...when he responds to this and mentions, Big Blocks and torque is for fags, don't take it personal.



    Oh, and my other BFF Wet Dream told me to post the above.
    Hey Hammer....Gonna call BS on the torque versus HP deal ...Without torque you have no HP....All HP is, is sustained torque at a higher engine speed, the reason for the "must have torque for a jet" is the load never lessons on a jet, if the top torque numbers were not at or near the top HP RPM, it will fall like a rock off a cliff...The jet requires the torque output all throughout the upper RPM range....BTW I know you were just pulling our Zuccini's

    As for the small block question, thats a tricky one...Small blocks work really well in a jet as long as you keep your expectations low...The small block needs to spin a little harder (faster) to d the same work as a big block...That being said, the efficiancy will be lower on all counts..(not talking fuel mileage at all), talking about pump efficiancy, the faster the pump turns, the more overall HP it absorbs, that being said, if you need to spin it faster, the impeller must be smaller if the RPM needs to be higher, doing less work to keep the engine in its perspective HP/Torque curve...

    I have built several jets over the decades and about 1/3 have been with small Chevy's, they work well, but are not going to outrun a stock Bigblock without a lot modifications and engineering....Both on the motor and pump setup.

    If you want an honest 60 MPH boat and still pull a tube, a small block is the way to go....If you're looking for the mid 70's and pull the same tube....Go big block or go home, it will save you some frustrations in the long run. Just my .02

    GT
    GT


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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by danhercules View Post
    How much TQ can you get out of the small block. I would love to see it, I like seeing different things.
    My dad's 418" 10:1 smblk Ford with a hydr roller (small) made 525 lbs ft at 4,800 and 525 hp @ 5,600.

    My 408" pump gas 12:1 engine made 657HP at 6,600 w/ 559 lbs ft at 5,400 with a single plane Vic Jr and 620 [email protected] 6,400 w/ 557 lbs ft @ 4,500 with an RPM Air gap. both with a modified 750 Demon Carb that flowed 800 cfm.
    It has the internals to be able to spin 8,000, swap the cam out and let it rev 7,200 (700 hp) in a light jet. Or detune it a bit and have a 600 hp smblk in your everyday family crusier.

    I think it would be a hoot in the correct boat and a 200 hp shot of Nos.

    S CP
    Last edited by Sleeper CP; 08-29-2009 at 02:33 PM.

    "Dark Sarcasm"
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    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

  13. #11
    CANT RE MEMBER FARMER JOHN's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    My dad's 418" 10:1 smblk Ford with a hydr roller (small) made 525 lbs ft at 4,800 and 525 hp @ 5,600.

    My 408" pump gas 12:1 engine made 657HP at 6,600 w/ 559 lbs ft at 5,400 with a single plane Vic Jr and 620 [email protected] 6,400 w/ 557 lbs ft @ 4,500 with an RPM Air gap. both with a modified 750 Demon Carb that flowed 800 cfm.
    It has the internals to be able to spin 8,000, swap the cam out and let it rev 7,200 (700 hp) in a light jet. Or detune it a bit and have a 600 hp smblk in your everyday family crusier.

    I think it would be a hoot in the correct boat and a 200 hp shot of Nos.

    S CP


    JON, PUT IT IN YOUR WILDER

  14. #12
    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by FARMER JOHN View Post
    JON, PUT IT IN YOUR WILDER
    Oh yeah,

    I forgot to mention that I knew this crazy ass farmer from Yuma who had a 420"+ Smblk Chevy in a little 16' boat with a 400 hp Nos system. When that boat wasn't "lifting a head" it was F-ing gone.

    Hi John......

    Well, I haven't sold the Wilder so at this point the only thing holding me back is the $$$$$.

    Sleeper 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"

  15. #13
    CANT RE MEMBER FARMER JOHN's Avatar
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    Thumbs up Luv them smallblocks

    Quote Originally Posted by Sleeper CP View Post
    Oh yeah,

    I forgot to mention that I knew this crazy ass farmer from Yuma who had a 420"+ Smblk Chevy in a little 16' boat with a 400 hp Nos system. When that boat wasn't "lifting a head" it was F-ing gone.

    Hi John......

    Well, I haven't sold the Wilder so at this point the only thing holding me back is the $$$$$.

    Sleeper CP

    WELL JON, YOU HAVE THE SMALLBLOCK, YOU HAVE THE BOAT, YOU HAVE THE PUMP & POPOFF, AND I KNOW IF YOU LOOK IN YOUR "other" POCKET THE $$ WILL MAGICAL APPEAR, YOU JUST DON'T HAVE THE TIME, IFIN YOU FINISH THE STATION WAGON THAT WILL HELP,

    BTW YOU DIDN'T SEE THE OTHER SYSTEM ON THAT SMALL BLOCK! RUNNING BOTH OF THEM WE COULD USE UP THREE MOTORS ON A HOLIDAY WEEKEND, DAMN THOSE WERE THE DAYS

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    NorCal HotBoats Chili's Avatar
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    Quote Originally Posted by MRUSER View Post
    sbc 400 pushing around 450hp or a slightly built 454
    For Tubing.. its not even a question. IMO
    Why bother with all the performance stuff in a mouse to get 450hp out of it, when you can have a nice reliable rat.


    I always thought a small block would be better in a V-Drive than a Jet.. No.?
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