25 Daytona w/800hp how fast?
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25 Daytona w/800hp how fast?

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    Senior Member lake p.a.l.'s Avatar
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    Default 25 Daytona w/800hp how fast?

    My new 632" naturally aspirated motor for my 25 Daytona should be done in the next few weeks. Its 1.36 gear and I'm gonna start with a 30 prop. What mph #s you guys think I will see? Its a kevlar lay up.

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    Quote Originally Posted by lake p.a.l. View Post
    My new 632" naturally aspirated motor for my 25 Daytona should be done in the next few weeks. Its 1.36 gear and I'm gonna start with a 30 prop. What mph #s you guys think I will see? Its a kevlar lay up.
    With that hp, your 25 will definitely run over 100 - what rpm do you want to spin that big-inch motor? I personally think you're geared/propped a little tall to be starting out, but maybe you want to keep the rpm low?

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    Diesel Pimp WINspeed's Avatar
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    Quote Originally Posted by Rayzor View Post
    With that hp, your 25 will definitely run over 100 - what rpm do you want to spin that big-inch motor? I personally think you're geared/propped a little tall to be starting out, but maybe you want to keep the rpm low?
    The cam will pull to a little over 6k on this 632, It's a 11.6 deck motor so the rod length is through the roof(7.5 inches) to make for a happy motor at high RPM. Realistically it will be 750hp with well over 800lbft. When all is correct, I.E. X dimension, Prop, gear ratio, It will run real good. This is a real trick motor going together, I got Tony Mamo to custom design a cam for this beast.
    Last edited by WINspeed; 06-05-2014 at 10:02 PM.

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    Quote Originally Posted by WINspeed View Post
    The cam will pull to a little over 6k on this 632, It's a 11.6 deck motor so the rod length is through the roof(7.5 inches) to make for a happy motor at high RPM. Realistically it will be 750hp with well over 800lbft. When all is correct, I.E. X dimension, Prop, gear ratio, It will run real good. This is a real trick motor going together, I got Tony Mamo to custom design a cam for this beast.
    It sounds like a great setup, but if the boat is setup correctly with a good prop, 6,000rpm would be 113mph. I highly doubt it will be that fast - that's why I was saying it sounds geared/propped too tall. Plus, I always like to start on the light side of gear/prop when starting with an unknown - it's easier to add pitch than to chase setup if you can't pull too tall of a prop out of the gate. I'm certain that if your involved Adam, it will run great!

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    I just ran the #s using my buddy Danny's 25 Daytona as a known. His boat runs 85mph on GPS with 500hp, so using BAM's speed calculator, the same boat/setup with 750hp will run 104 - and with 800hp it will run 107. I will bet any amount of money these #s will be within 2mph of what this boat will run if the hp #s are accurate!

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    Senior Member ONE-A-DAY's Avatar
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    My 26 with 917 hp and a 1.50 ran 117


    Sent from my iPhone using Tapatalk

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    Quote Originally Posted by ONE-A-DAY View Post
    My 26 with 917 hp and a 1.50 ran 117


    Sent from my iPhone using Tapatalk
    Sounds right on - using the same constant as my friend's 25, but plugging in 917hp it calculates 115mph! Like I said, within 2mph.

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    Senior Member Hullshot's Avatar
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    Rob I thought you didn't care about speeds? And razor take into consideration all these other boats that run over, say 90, have speed master type lowers and higher X dimensions. Robs is still all stock unless he bought one in the last week? So with the 1.36 gears and 30 pitch prop I would say 5000-5300 tops on rpms.

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    Senior Member ONE-A-DAY's Avatar
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    Quote Originally Posted by Rayzor View Post
    Sounds right on - using the same constant as my friend's 25, but plugging in 917hp it calculates 115mph! Like I said, within 2mph.
    2" shortie speed master as well


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    the silver bullet! TUNNEL T's Avatar
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    Whatever hp she should run well !!! Good luck testin and tuning .....TUNNEL T
    FINAL TOUCH DETAILING

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    Senior Member obsessive compulsive's Avatar
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    Quote Originally Posted by TUNNEL T View Post
    Whatever hp she should run well !!! Good luck testin and tuning .....TUNNEL T
    Yeah what T says. Some of my most funnest time was testing and Tuning.

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    Senior Member HighVoltage329's Avatar
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    632"

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    pay me or pay me no mind 707DOG's Avatar
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    Who would of thought a 2" shorty would improve your life...lol...
    let's see some pics of the monster getting put together...
    If is not fast enough just throw more $$ at it


    I call it the brain tube, I've been telling her the more time she spends on it, the smarter it's going to make her.

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    Quote Originally Posted by Hullshot View Post
    Rob I thought you didn't care about speeds? And razor take into consideration all these other boats that run over, say 90, have speed master type lowers and higher X dimensions. Robs is still all stock unless he bought one in the last week? So with the 1.36 gears and 30 pitch prop I would say 5000-5300 tops on rpms.
    Gotcha' Don. Yes, even Danny's 25 has a 2" shorty Imco lower, but, his 25 was the first one built and has the drive mounted 2" lower than any other I've seen. We have his dialed-in quite well though (85mph w/ a stock GM crate 502/502), so I think it's a pretty good boat to use as a constant. The setup Rob has now is badass, and I think it's the best route to go in any performance boat (everybody knows I love NA motors). Whatever it ends up running, it's going to be an awesome Delta rig and I'm very happy for him to have such a nice setup!

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