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Headers

  1. #1
    Senior Member CK7684's Avatar
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    OK, so I just bolted on a set of OT headers. I am wondering if I should just run them dry, or install the T valve etc needed. I have the injection lines but thats it. Whats the best way to control the water without a lot of expense? Mostly I want to try these out for a summer before I spend the money on jacketed TT headers. I picked these up used so I'm not too worried about looks. They already have a few ugly spots, although they do look good from 10-20 ft away

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    Senior Member Boat 405's Avatar
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    Quote Originally Posted by CK7684 View Post
    OK, so I just bolted on a set of OT headers. I am wondering if I should just run them dry, or install the T valve etc needed. I have the injection lines but thats it. Whats the best way to control the water without a lot of expense? Mostly I want to try these out for a summer before I spend the money on jacketed TT headers. I picked these up used so I'm not too worried about looks. They already have a few ugly spots, although they do look good from 10-20 ft away
    run them dry any they will turn blue to the tips and discolor and get quite hot. Other than that, run em.

    If you want them wet, just go to bassettracing.com and look at their water diagram

    or look below.

    Boat 405.

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    Senior Member CK7684's Avatar
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    I was checking out the Bassett site on plumbing. Is there a way to run them when I have a thermostat? Or, if I run them dry how close can they be to the transom before it gets dangerous? They are about an inch from a carpeted area, and a couple inches above the transom...
    They are already a bit blued, but nothing too terrible. The chrome on the tips is gone in a few areas and a bit of rust...my main concern with running them dry is safety...

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    Senior Member H20MOFO's Avatar
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    I think you'll be suprised how much heat they will radiate. I have a dry set with an 02 in them for tuning. I don't think I'd care to have them on when it's 100* outside. As far as plumbing with a thermostat, I'm pretty sure rex has a diagram on his page where his thermostat kit is listed.
    Another Hot Boat refugee

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    run the water lines.most lakes or rivers have some kinda police,they lookfor something,so running water quites them and reduces some heat.if yours are jet coated,mine are,then also un water,but when you ant to race or just mess around,they dont stay hot for long.peps in the back seat also feel the heat,its less with jet coated headers.

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    Senior Member jetboatperformance's Avatar
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    We recommend you run them wet for both saftey , and law enforcement ramifications , we do plumb all our headers with a positive manual control valve prior to the traditional "failsafe" T-valve. I mount my manual valve at or near the driver seat for ease of operation and to control/limit the amount of water thru the headers . The T-valve will typically control the "forgot" factor but are subject to "fowling" I shut the water completely off in the five zone at idle and on WOT pass's . Water injected headers do not take an enormous amount of water to run properly , too much water can result in reversion issues. The heat from dry headers will actually cook the adjacent paint and burn fiberglass as well as Skin PS running with a T stat/bypass system is not a problem Call if we can help Tom


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    Senior Member 74glencoe's Avatar
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    Listen to tom. I branched my header supply out of the feed line from the pump to the motor, i just put a gate valve before the header tee to regulate the amount of water, and the tee bought the farm once, and i just barely cracked the valve and ran the rest of the weekend.

  10. #8
    Senior Member Delemorte's Avatar
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    Dang tom.. That just melted didnt it??


    Here are some pipes i own. These were obviously ran dry.



    I have also run dry headers, by accident , the heat coming off those SOB's is intense. It makes the back seat very uncomfortable even at speed.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Senior Member CK7684's Avatar
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    Thanks for all the replies!! If it's just a matter of T-ing off the supply line I will go ahead and run them wet. I dont usually carry back seat passengers but I definately dont want to scorch anything!!

    P.S. Will have a pressure reg affect anything? Should I just T off of the line after the regulator? Or can I T off of the regulator bypass hose?

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    The Man cordog009's Avatar
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    Quote Originally Posted by CK7684 View Post
    Thanks for all the replies!! If it's just a matter of T-ing off the supply line I will go ahead and run them wet. I dont usually carry back seat passengers but I definately dont want to scorch anything!!

    P.S. Will have a pressure reg affect anything? Should I just T off of the line after the regulator? Or can I T off of the regulator bypass hose?
    It's not the supply line, but the exit side of the engine where you want to tap into for your header water. A regulator is cheap insurance, and won't affect anything, but I would still run one line to the engine, and have two outlets with one going overboard and the other going to the Bassett T-valve for the headers.


    1984 Youngblood TX-19 SOLD

  13. #11
    Senior Member CK7684's Avatar
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    But if I am running a thermostat, wont that affect the water on the outlet side of the engine-to the headers? I am thinking I can T off the regulator bypass hose and go to the headers from there. Then my water going to the engine wont be changed at all...

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