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Discussion Starter #1 (Edited)
Hi, question for those smart on basset headers please. The drain plug hole at the bottom, mid pipe, i just plugged it today. (this is unrelated to the main injection system, this is a hole half way down the main/upper pipe at 6:00 position) the main injection system does have an overboard drain and seems to work with water coming on around 1500

should I route a drain assembly overboard? bassett site does not discuss. system worked perfect, water on about 1500 RPM today, first time using/setting up. if the answer is yes, may help my cleanliness problem. although I have the long pipes, they still drool the nasty exhaust water on the paint as the headers end just at the transom and I have muffler end pieces (which still sound awesome!)

...that is sticky nasty stuff on the brand new paint!

...also, is there a reason to worry backing off the throttle quickly, water back into engine?

thanks for any advice on both. that boat "hauled the mail" today until the carb float stuck and the engine caught on fire! adjusted on the lake, waves rolling me all around -too funny! but I drove it back to the dock! (with fire agent all over it :(

LOL
 

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What the Hell is That?
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Are you saying you have a hole on the bottom of the collector? Water injected headers have four injection points per header and there all at the lowest point in the pipe usually the bend. Now if you have another hole farther down say in the collector (after the four pipes come together) it was mostly likely used for a Evac bung or maybe an Air Fuel Gauge or similar. If your not using those plug it or steam will spray out of there.


"The main injection system does have an overboard drain and seems to work with water coming on around 1500"That statement has me confused. Water goes into the block circulates, then dumps overboard and the other if running OT Water injected headers goes to a T valve, then to the headers turns to steam and is blown out with the exhaust. Also when you say drool how much water is coming out? Should look like a mist. If you have water droplets theres way to much pressure.
 

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steelcomp was here
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Those are "weep" holes and they're there to ensure that no water will collect in the header tube and run back into the engine through the ex port and an open ex valve. That's why they're at 6 o'clock, and on the very bottom of the tube...they work on gravity. If you somehow capture them and run them overboard you will stop the mess but you'll defeat the purpose if the exit is above the lowest part of the ex port. They're not mandatory, but anything you do to modify them you do at your own risk if you defeat their purpose. If you think you have the ex. water under control, it's not a big issue.
 

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I'm No Expert
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Yep, those are "weep holes". They are pretty small so i'm pretty sure the idea behind them is mainly to just allow excess water to drain out so that it doesnt sit in the bottom of the header (or end up in your engine) while sitting.

As for the paint/gel/header problem, your probably running too much water through your headers. I had the same problem with the basset valve. I bought these AN fittings from Rex Marine that had restrictors in them which helped, it wasnt until i put a banderlog electronic system onto the boat that i was able to really fine tune the system and make it right. When i had it right, you could barely tell water was being injected into them. It kept the back area alot cleaner with only a minor little spots. Your boat shouldnt look like a steam ship when running. :D
 

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steelcomp was here
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I forgot to add...the weep holes also help keep the tubes from rusting because of water just sitting in the bends.;)
 

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What the Hell is That?
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Aww I forgot about the weep holes.


Sent from my iPhone using Tapatalk to hide from the IT dept.
 

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Discussion Starter #8 (Edited)
hi,

thanks for advice!!

- no it is not the weep holes. this is a single hole, bottom of pipes, after collector, half way to transom, looks factory made, probably a 3/8 npt pipe thread. not angled enough for an evac system (guessing) maybe these are setup for an air/fuel mixture bung. didn't think of that. I plugged them for the ride the other day, will leave it that way. Makes sense now.

- yes, I have a brand new t-valve on the water supply. Installed off one side of the thermostat discharge, the other side goes overboard with a 1/2 inch gate valve to adj pressure, though so far its been wide open as water comes on at 1500 RPM. My thermostat housing is the good one from cp performance that bypasses water continuously unless thermostat opens. (four ports on thermostat housing) I also have the over-pressure bleed valve from CP perf on the main feed in line at pump housing. Overall it should be minimum pressure in cooling system. (this is a 454 engine with 10:1, heads, cam et) Engine runs at 180 solid, no fluxuation in temp at all.

guess i need to restict the flow more. Mine looks like a very fine mist when running above 1500, but it drips because I have crap on my paint. and that hot fluid/exhaust water sticks to paint like glue. My paint is brand new and I had to use significant force to wash it off – eventually I’ll damage the paint. (didn’t just wipe off easily, had to rub hard with soap/water)

thanks again
 

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What the Hell is That?
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Are you running any type of mufflers? Bassett put small holes on the ends for the muffler to bolt to.
 

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steelcomp was here
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Thats for the evac system. somebody's got to have pics lying around
Evac systems are tubes usually 3-4" long and welded in at a 45* angle, and and would have a 1/2" male pipe thread that the anti-backfire valve threads on to.
 

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hi,

looks factory made, probably a 3/8 npt pipe thread. not angled enough for an evac system (guessing) maybe these are setup for an air/fuel mixture bung. didn't think of that. I plugged them for the ride the other day, will leave it that way.
If you plugged them then you know the size...which was ?????

Reason for asking, 3/8" is way to small for an o2 sensor bung.
 

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Discussion Starter #15 (Edited)
thanks again!

concur, I have run a evac before and this hole is to small and vertical vice the 45 degree.

unsure on the 02 sensor, agree (3/8 npt) is to small for a standard one, certainly to small for any I've seen on a car. dunno. guess that's why i thought it was a drain to begin with. when i ran it in the driveway open, it spit water and exhaust lightly and wasn't obnoxious loud or anything, I could easily Y them together and drain them overboard. but since the bassett headers are not designed for this, guess I'll just leave the brass plugs in. I ordered .100 inserts to lower the water being injected.

thanks again for advice.
 

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steelcomp was here
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I'm wondering if at some time, someone might have had engine overboard water plumbed into these openings.:)bulb
 
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