nozzle inserts
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nozzle inserts

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    Default nozzle inserts

    what exactly do they do?? what cud i gain/lose and how do i know which one i have?
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    nobody???
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    What the Hell is That? 72Hondo's Avatar
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    There's Multiple threads on here about the subject.

    Search and you will find.

    and also its Friday, Most guys are at the river or lake.
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.
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    Sit N' Spin Jetaholic's Avatar
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    A stock nozzle or stock Place Diverter will have to be machined for them, unless you happen to have the FTN Place Diverter. But in short they make the nozzle smaller, which restricts the outflow more and builds more bowl pressure.

    Since I've never used them, I have no clue what it would do for your setup.
    Last edited by Jetaholic; 08-14-2009 at 05:28 PM.



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    Quote Originally Posted by 93ultra View Post
    what exactly do they do?? what cud i gain/lose and how do i know which one i have?
    Do you have an insert or is it a standard fixed size? If it is an insert, what color is it ?

    If I re-call correctly standard size is 3.125"

    Q: Boat,mph,hp,rpm and what do you want to do?

    S CP

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    Quote Originally Posted by Sleeper CP View Post
    Do you have an insert or is it a standard fixed size? If it is an insert, what color is it ?

    If I re-call correctly standard size is 3.125"

    Q: Boat,mph,hp,rpm and what do you want to do?

    S CP
    What kind of results have you seen playing with them Jon? Worth it for the average river boat?
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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Pw_Tony View Post
    What kind of results have you seen playing with them Jon? Worth it for the average river boat?
    not really, 3.125 is about as good as it gets unless you're racing and looking for every split second

    Dare to be different, if it turns out great you can claim you planned it that way.

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    Quote Originally Posted by Pw_Tony View Post
    What kind of results have you seen playing with them Jon? Worth it for the average river boat?
    Quote Originally Posted by IMPATIENT 1 View Post
    not really, 3.125 is about as good as it gets unless you're racing and looking for every split second

    X2 I think the most change I ever saw with Radar and GPS was 1.5 mph.

    As Tom stated a 3.125 will do just fine for 98% of jets. That 1.5 mph was at 98 mph using over 1,000 hp.

    Edit: It was pointed out to me by a really smart man I know, that my jet that has ranged in power from 780-935 hp off the Nos since '95 will not represent your typical boat. I would agree with that, a typical boat and power level may well benefit from a smaller nozzle size.

    S CP
    Last edited by Sleeper CP; 08-14-2009 at 10:31 PM.

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    Senior Member Ken F's Avatar
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    Quote Originally Posted by Jetaholic View Post
    Since I've never used them, I have no clue what it would do for your setup.
    ....But I just couldn't resist making a comment anyway.
    The liberals are asking us to give Obama time. We agree and think 25 to life would be appropriate.
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    Living in a cage of fear thatguy's Avatar
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    Quote Originally Posted by Ken F View Post
    ....But I just couldn't resist making a comment anyway. Even if it is a more or less inaccurate comment to boot.
    Fixed it for ya'.
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    Quote Originally Posted by 93ultra View Post
    what exactly do they do?? what cud i gain/lose and how do i know which one i have?
    first part answered by sleeper and tom, assuming you have a place diverter the red insert is 3.125 the standard berkeley nozzle was 3.250 and the standard place without insert is 3.125. if it is of some other orgin take measurement of the i.d. to assure what size it is. i have seen several of the colored inserts not measure even close to what they were supposed to be. many variables as size weight use and horsepower, the only accurate way to find out what it will do for your boat is to try different sizes and accurately radar the results, imo.
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    Quote Originally Posted by johnray069 View Post
    first part answered by sleeper and tom, assuming you have a place diverter the red insert is 3.125 the standard berkeley nozzle was 3.250 and the standard place without insert is 3.125. if it is of some other orgin take measurement of the i.d. to assure what size it is. i have seen several of the colored inserts not measure even close to what they were supposed to be. many variables as size weight use and horsepower, the only accurate way to find out what it will do for your boat is to try different sizes and accurately radar the results, imo.
    yep, what he said. except to me, the most accurate effect is a track. beyond that, what you "feel", and radar.

    Quote Originally Posted by 93ultra
    what exactly do they do??
    first, they make the exit hole round instead of some other cast shape which is not round.

    second, they are used to "fine tune" (FTN = fine tune nozzle) mass and velocity. everything else being the same, same engine, same pump, same same, a change in nozzle diameter will affect exit velocity. from conservation of energy, a change in exit velocity much result in a change to mass flow rate (these are two different values).
    without getting into the effect of changing from one size to another, the objective is to identify an insert that optimizes both values for a given boat.

    Quote Originally Posted by 93ultra
    what cud i gain/lose and how do i know which one i have?
    because i've track tested with these things ALOT over the last 9 years, both ftn's and my own stuff, i feel like they are the least expensive performance improvement that can be made when compared to performance with a stock cast nozzle.
    if you want to know what/which insert you have, remove it and mic the id at exit. standard red is 3.125, and i do not agree that "most boats" obtain best performance with that size, as "most boats" don't have 1k hp...

    these things are not a replacement for more hp or a finely blueprinted pump. they are used to "fine tune".
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    Quote Originally Posted by bp298 View Post
    yep, what he said. except to me, the most accurate effect is a track. beyond that, what you "feel", and radar.




    these things are not a replacement for more hp or a finely blueprinted pump. they are used to "fine tune".
    That being said Bob, will the average Joe with a 550-600 hp 700 lbs Vee hull turning 5,600 rpm gain much from one. As I stated I think the most change I've seen on anyone day was 1.5 mph and that was back when the boat ran 103 on the Nos. Yes it is Fine tune, more to be found with the Intake grate don't you think?

    S CP

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    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"
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    i have a 21 foot ultra open bow w/ 454 and a dominator jet. it have a hydo place divertor but idk wht the insert is no color just silver
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