What is a good cubic inch!
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What is a good cubic inch!

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    Senior Member Widetrack's Avatar
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    Default What is a good cubic inch!

    To all the motor builders and head gurus! I am in the process of gathering pieces to build a big cubic inch BBC! And I know cubic inch will pick the head size! So my question is for a jet boat I would like to have some input to decide the cubic inch that I build! I would like to turn around 6500-6600 max and you all know HP is a must! 850+! The reason I say big cubic inch is that you don't have to run a huge cam(less stress on valve train) for the HP! What is or is known to be a good base for jets in cubic inch and dependable! WT

    I know the last line does not go together!!!
    Last edited by Widetrack; 07-14-2010 at 01:48 PM.


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    mo balls than $cents$ IMPATIENT 1's Avatar
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    coby, my uncle has a 540 he wants to sell with a 4.5 cola, eagle rods, and the block is oringed tall deck, bored to 125 over. i know the block is about done but he's not askin much for it all and we're close jus needs a set of pistons put in it, and if ya want alil more compression, you'll need to add mallory to the crank. let me know and i'll get ya a nice deal on it all the crank is worth a grand almost by itself. we called diamond bout some pistons and they'll be 650bucks weighin what the ole 1's did
    block is freshly bore ready for final hone to pistons, studded out 4bolt internally polished and screened.
    Last edited by IMPATIENT 1; 07-14-2010 at 02:25 PM.

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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by Widetrack View Post
    To all the motor builders and head gurus! I am in the process of gathering pieces to build a big cubic inch BBC! And I know cubic inch will pick the head size! So my question is for a jet boat I would like to have some input to decide the cubic inch that I build! I would like to turn around 6500-6600 max and you all know HP is a must! 850+! The reason I say big cubic inch is that you don't have to run a huge cam(less stress on valve train) for the HP! What is or is known to be a good base for jets in cubic inch and dependable! WT

    I know the last line does not go togethe
    r!!!
    Really ?


    The only time the 565 has been hurt is on the nos. The same major pieces since '93. The pistons were swapped out in 2000. It made 855 at 6,800 with 10.8:1 and ran on pump gas before the major redo in 2007 with different heads that bumped the compression to 12:1 and made 935 at 7,000.

    Is this a pump gas deal for the 850 HP?

    Cubes and heads to feed it and of course the right cam. If it were me and I wanted 850 on pump gas it would be no smaller than a 565" (4.60 x 4.25) up to 600", but more than likely a 582" ( 4.60 x 4.375") a Ford of course, tight combustion chamber with 10.5:1 compression and the right cam from Danny Crower. You'll need a set of heads that flow around 400 cfm @ .750"

    Good luck.

    S CP
    Last edited by Sleeper CP; 07-14-2010 at 02:39 PM.

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    Senior Member Widetrack's Avatar
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    Tom, I will let you know on that setup! Shoot me a PM on the $$$ Thanks WT


    Jon, LMAO! My thoughts were a 572 to a 632 not wanting to thrash this thing out! I am just getting info. on different combos to see where the money is going to have to go! Yes Fords are tough and you have built some beast Fords! But Chevrolet is my way and some of the head guys will know what it takes to make one zip! It will be a pump gas motor with bite not looking for race motor just good HP and TQ! I have been talking with Chris S. and he is helping me out too! WT


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    Senior Member Cowboy_Mike's Avatar
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    Quote Originally Posted by Widetrack View Post
    To all the motor builders and head gurus! I am in the process of gathering pieces to build a big cubic inch BBC! And I know cubic inch will pick the head size! So my question is for a jet boat I would like to have some input to decide the cubic inch that I build! I would like to turn around 6500-6600 max and you all know HP is a must! 850+! The reason I say big cubic inch is that you don't have to run a huge cam(less stress on valve train) for the HP! What is or is known to be a good base for jets in cubic inch and dependable! WT

    I know the last line does not go together!!!
    With the right set up on your pump, you could pull a 700hp motor to do 90mph+. Either way thats alot of ponies, and pump work!

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    Senior Member Red Rocket's Avatar
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    Recently did a 598 pump gas single carb very mild hyd roller made 800 at 5800 what you asking for is very easily done. Plenty of off the shelf parts to do it, won't require custom componets.

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    gn7
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    Quote Originally Posted by Crazyhippy View Post
    598s and 632s get withit. What CID? Big, no wait huge. No thats not it. Humungus Thats alittle closer



    Don't laugh. I know somebody with one of these if your interested. Believe it or not, that really is a Ford in a Ford! Let see GM pull that off!



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    Last edited by gn7; 07-14-2010 at 06:58 PM.

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    For 6500 measily rpm I'd built it as big as possible.

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    your doing the same thing ive been researching,lol!!!!

    i would go with around 565 and build the best combo of parts you can.

    there shouldn't be any reason even with pump gas you cant get 850 or very damn close to it at around 6500.

    but of course you need a tunnel ram with some dominators on it

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    just a ski boat with bark Carnivalride's Avatar
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    Quote Originally Posted by hotbo View Post
    your doing the same thing ive been researching,lol!!!!

    i would go with around 565 and build the best combo of parts you can.

    there shouldn't be any reason even with pump gas you cant get 850 or very damn close to it at around 6500.

    but of course you need a tunnel ram with some dominators on it
    So if 6500rpm is redline and you're talking pump gas why not build a 632 or at least a 598?
    Quote Originally Posted by gn7 View Post
    Carnivalride, you really need to find some other hobby. You have no talent for this boat thing

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    Senior Member Widetrack's Avatar
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    Quote Originally Posted by Cowboy_Mike View Post
    With the right set up on your pump, you could pull a 700hp motor to do 90mph+. Either way thats alot of ponies, and pump work!
    Cowboy. I am running 725 HP now on a 496 and over 90MPH!

    Quote Originally Posted by Crazyhippy View Post
    How about an 892?

    Crazyhippy sounds and looks good but overkill! I would like it!

    http://www.sonnysracingengines.com/e...-racing-engine

    Quote Originally Posted by Red Rocket View Post
    Recently did a 598 pump gas single carb very mild hyd roller made 800 at 5800 what you asking for is very easily done. Plenty of off the shelf parts to do it, won't require custom componets.
    Red Rocket, This is as easy as pulling the check book out! I had a 505 that made over 800 HP! But my thoughts say build a big cubic inch with a mild solid roller and save the valve train and still pull the numbers!

    Quote Originally Posted by gn7 View Post
    598s and 632s get withit. What CID? Big, no wait huge. No thats not it. Humungus Thats alittle closer

    gn7, You crack me up! I am trying to build power without forcing the motor to it's cracking up point! POP! And I thought you would be all over this with your expert advice!



    Don't laugh. I know somebody with one of these if your interested. Believe it or not, that really is a Ford in a Ford! Let see GM pull that off!
    Quote Originally Posted by Fiat48 View Post
    For 6500 measily rpm I'd built it as big as possible.
    Fiat48 Yes! a measily 6500 RPM due to oiling system, staying in a budget and longivity! Plus it is there if I want it! It will be able to pull over 7000 on juice!

    Quote Originally Posted by hotbo View Post
    your doing the same thing ive been researching,lol!!!!

    i would go with around 565 and build the best combo of parts you can.

    there shouldn't be any reason even with pump gas you cant get 850 or very damn close to it at around 6500.

    but of course you need a tunnel ram with some dominators on it
    Travis, It will come in time but, it will be one piece at a time! I have two Dominators now and think I can pull this off with a Q Jet! LMAO!

    Thanks Guys! WT


    SOMEONE SAID YOU CAN'T TAKE IT WITH YOU! SO,IM BURNING IT UP ONE GALLON AT A TIME!
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    4.5 x 4.5 or 4.625x 4.5 tall deck, longest rod as possible, 9.5-1 hydraulic roller, best parts possible, should be a nice motor. Nice stump puller...

  16. #14
    Senior Member Widetrack's Avatar
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    Quote Originally Posted by Carnivalride View Post
    So if 6500rpm is redline and you're talking pump gas why not build a 632 or at least a 598?
    6500 is a base point! I was just tring to get some CI ideas to choose from looks like it will be a 572 that I can rebuild to be a 598! If I put my mind to it I can go over 900 HP with the right combo! Yes on pump gas! Have even thought about a Pro Charger that would do it don't ya think! WT


    SOMEONE SAID YOU CAN'T TAKE IT WITH YOU! SO,IM BURNING IT UP ONE GALLON AT A TIME!
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