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Something is off?

  1. #1
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    Default Something is off?

    I dont think my boat is running the correct rpms for my setup. I have a fresh jacuzzi wj w/ an b impeller snd a 460 bored .030 with keith black dish pistons. Ported d0ve-a heads, stealth intake. Trick flow pushrods with comp roller rockersCrane 288 commander cam. 850 dp. Msd distributor with a msd box. It only turnd 45-4600 rpm max. Problem id I was turning that before when it was stock. I have swapped tachs already. What could be the problem? Camshsft timing maybe?
    "Im Too Drunk To Taste This Chicken"

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    Senior Member larryfknrocks's Avatar
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    Quote Originally Posted by mygarageguys View Post
    I dont think my boat is running the correct rpms for my setup. I have a fresh jacuzzi wj w/ an b impeller snd a 460 bored .030 with keith black dish pistons. Ported d0ve-a heads, stealth intake. Trick flow pushrods with comp roller rockersCrane 288 commander cam. 850 dp. Msd distributor with a msd box. It only turnd 45-4600 rpm max. Problem id I was turning that before when it was stock. I have swapped tachs already. What could be the problem? Camshsft timing maybe?
    Good chance it could be a timing issue.

  4. #3
    Platinum Member BigSteve's Avatar
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    Quote Originally Posted by mygarageguys View Post
    I dont think my boat is running the correct rpms for my setup. I have a fresh jacuzzi wj w/ an b impeller snd a 460 bored .030 with keith black dish pistons. Ported d0ve-a heads, stealth intake. Trick flow pushrods with comp roller rockersCrane 288 commander cam. 850 dp. Msd distributor with a msd box. It only turnd 45-4600 rpm max. Problem id I was turning that before when it was stock. I have swapped tachs already. What could be the problem? Camshsft timing maybe?
    That would be the first thing to check for sure
    Put a degree wheel on it and get your cam card out
    Lot of mistakes happen on the 429-460 here
    If you ain't the lead dog the view is always the same !

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    Ok so it does sound off then. ill check it out.
    "Im Too Drunk To Taste This Chicken"

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    Senior Member ol guy's Avatar
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    Quote Originally Posted by mygarageguys View Post
    Ok so it does sound off then. ill check it out.
    Need more info!!! Hull type, weight, loader style if any?

  8. #6
    Senior Member brgrcru's Avatar
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    Quote Originally Posted by ol guy View Post
    Need more info!!! Hull type, weight, loader style if any?
    X2

  9. #7
    gn7
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    Quote Originally Posted by ol guy View Post
    Need more info!!! Hull type, weight, loader style if any?
    Quote Originally Posted by brgrcru View Post
    X2
    I agree.
    Lets try to be realistic here. If the timing is off due to a "replacement" timing set that has a retard built in it like most "replacement" Ford sets do, and the OP didn't use a name brand performance T set, what is the very very best super optimistic RPM gain you could expect to see if the timing was "corrected"?

    Remember, MOST el cheapo replacement sets retard the timing which isn't exactly detrimental to turning RPM.
    I wonder what pie in the sky RPM the OP was hoping to turn.



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  10. #8
    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by mygarageguys View Post
    I dont think my boat is running the correct rpms for my setup. I have a fresh jacuzzi wj w/ an b impeller snd a 460 bored .030 with keith black dish pistons. Ported d0ve-a heads, stealth intake. Trick flow pushrods with comp roller rockersCrane 288 commander cam. 850 dp. Msd distributor with a msd box. It only turnd 45-4600 rpm max. Problem id I was turning that before when it was stock. I have swapped tachs already. What could be the problem? Camshsft timing maybe?
    What do you honestly predict this motor should make for horse power and where is it (peak HP) made (RPM) given the combination you have described and assembled ?

  11. #9
    Senior Member Schiada 201's Avatar
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    4500 -4600 sounds about right for the setup you have.

  12. #10
    Platinum Member BigSteve's Avatar
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    Quote Originally Posted by gn7 View Post
    I agree.
    Lets try to be realistic here. If the timing is off due to a "replacement" timing set that has a retard built in it like most "replacement" Ford sets do, and the OP didn't use a name brand performance T set, what is the very very best super optimistic RPM gain you could expect to see if the timing was "corrected"?

    Remember, MOST el cheapo replacement sets retard the timing which isn't exactly detrimental to turning RPM.
    I wonder what pie in the sky RPM the OP was hoping to turn.
    Well Bob, in under a half hour I could top stop the piston verify cam timing and have a TDC mark to set timing from

    Its just a starting point for me. Before chasing my tail. I would verify the basics are in place first

    Seen a few people f- up multi key timing chains in the past or had the dampener slip and the timing marks are off when setting the dizzy

    Things that you are supposed to catch when building the motors vs assembling parts and hoping it works out
    If you ain't the lead dog the view is always the same !

  13. #11
    Senior Member hellnback's Avatar
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    I thought with Ford's you just throw some parts in a box..shake it and run what comes out?
    It may be OLD ,it may be Slow ... but at least it's MOBILE !!!

  14. #12
    Senior Member Josh@JBP's Avatar
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    Quote Originally Posted by mygarageguys View Post
    I dont think my boat is running the correct rpms for my setup. I have a fresh jacuzzi wj w/ an b impeller snd a 460 bored .030 with keith black dish pistons. Ported d0ve-a heads, stealth intake. Trick flow pushrods with comp roller rockersCrane 288 commander cam. 850 dp. Msd distributor with a msd box. It only turnd 45-4600 rpm max. Problem id I was turning that before when it was stock. I have swapped tachs already. What could be the problem? Camshsft timing maybe?
    Was the pump rebuild with the engine rebuild? If it was fairly worn prior to bebuild, tightening up the pump likely countered some of the rpm increase you would have seen with the added HP.

  15. #13
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    It is a 21 omega open bow with fresh jacuzzi wj. No loader.has Pd. Ride plate. Also the timing set is a cloyes double roller with 3 keyways set. Just seems off. Alot of money in the motor with no gains. Expected hp is 450ish. Btw I am running logs.
    "Im Too Drunk To Taste This Chicken"

  16. #14
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    Pump was rebuilt during the rebuild. I am looking for 5100 rpms ish. Is my setup capable of this? If not I believe my cam is the limiter. What do u guys recommend
    "Im Too Drunk To Taste This Chicken"

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