Plumbing the Mandella... please help

[Chief]

Ok getting ready to put my 454 in my Mandella. Im new to this and need help on running my water lines to and from the boat. I have one hole under the engine wher I am know thats where the water come in but hen wher do I route it from there? does anyone have routing for it..Im sure you do but I have a halibrand neovane on with a water line coming from each side. I have water injected bassetts and 4 holes out through the back of the boat two high and two low just above the cav plate> if it seems I dont know what im doing at this point your right! Please help

[Chief]

what about the water neck where the thermostat would be for a car?

[Snowboat]

You are not getting an answer because this is a frequently covered topic. Go to search, type in water lines or plumbing. Read those threads and see if that helps. Then come back with another specific question and they'll come out of hiding.

[Chief]

Thank you bery much Snowboat for letting me know. I am not the most computer savy and pretty new to this forum...Thanks again

[superdave013]

that is kind of a hard one as it seems everyone does it their own way.
But what the heck. I will bite and see if I can get you going on a basic system.
From the water pick up go to your water pump inlet.
Water pump out let goes to both inlets on the engine right by the timing chain cover. Try to get these hoses the same length so both sided of the engine flow the same.
Now, take the water out of the engine from the intake and run it out to one of the dumps at the back of the boat. You can block of the t stat housing and go out of a threaded port if you would like. Or you could get something from Rex Marine to bolt in place of the t stat housing that you can attach the hoses too. They have a buch of different ones.
Now for the headers. You should have a threaded outlet close the the t stat housing. Run that to a bassett t valve. Put some kind of valve on each header so you can adjust the water flow and get them to flow close to same amount. Lots of guys just use a ball valve here. I used small needle valves and they worked great. You don't need much water flowing though the headers and they should be dry and hot at idle. If you ever see raw water comming out the ends of the headers you have to much flow. Also make sure the weep holes in the bottom of the headers are not plugged. That is important and you should check that from time to time. I drilled mine out a bit just to be safe.
One last thing I do. I put a cross over hose from one side of the intake to the other at the water ports by the disturibter. That balances things out and helps keep steam pockets from forming.
So there you go. that should get you started. If the engine runs to cold come back and we can give you some tips on that. But the above is how lots of flats are done.
You should slide over to the v drive forum for these v drive boat related questions. There are some guys over there that really know their stuff and they just kinda stick to that one forum. They most likely didn't even see this post.

[21rayson]

never heard of a mandella with a pump in it just curious.

[superdave013]

Originally posted by 21rayson
never heard of a mandella with a pump in it just curious.
Well he said it has a neovane. That does not seem odd at all to me.
Are you sayin they are all force fed?

[Chief]

Hey SuperdaveThanks for reaching out to me. Thats what I really needed was the very basic routing. From reading alot of these posts as was suggested earlier I have realized that there are many different ways to arrange the plumbing however I guess what I needed was actually somewhere to start and you spelled that out for me like I needed. I guess maybee I should have focused a little more in grade school and I wouldnt have to ask such beginer questions. Damn I should have listened to my dad oh well cant undue 30 some years of not listening so I do appreciate your help with all sincerety You have guided me in the right direction!!!! Im sorry if I was confusing the subject Its not a pump as in jet. I was talking about my neovane water pump which actually I believe it says hallibrand or halliburton or something to that effect I will look at it tommorrow.
Chief
By the way you would think a Navy guy like me should know a little about this stuff,,,,but I dont :confused:

[superdave013]

glad to help! that what it's all about if you ask me.
You have to start some where and I know there is not alot of flats in your area. I grew up on a lake in N. Indiana and only saw 2 flats in the 21 years I lived there.
There is quite a few of them in CA were I live now.
But.... I have never seen a hallibrand water pump. I've seen other hallibrand hardware in flats though. If you can get a pic of that pump I'ed love to see it. Heck, I'ed love to see a pic of your boat in general.

[Chief]

Looked at the pump today and its actually a Hall Craft pump. I know its a Neovane of the smaller diameter impellor because mine has lost two vanes . I found replacement impellors on the glenl websight. The guy I bought the boat from must had a long cable (throttle cable) connected to a valve and I think I can see sort of his way of suppltying the water to the bassetsI think it may have come from one of the outlets on the intake and out to a dumphole however before it dumps out, that cable operated valve is in place. looks like if I were to open it some of the water would be shared to the headers after going through a T. The only problem I have with this is that water would take the path of least resistance and go straight out the dump hole Instead of trying to make it through the valve out the T and up to the headers???? And how about routing to the V drive? where does that water come from I saw a few posts but I wasnt sure where it originated form. I ll attach some pics.
Thanks again your helping me tremendously!

[Chief]

Maybee I wont I cant figure out how to do it? Even though I did it once before.http://

[Chief]

Ok by accident I did it on the very message that said I couldnt get!!!
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[Chief]

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[Chief]

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[superdave013]

You don't need very much water to go to the headers. You can put a ball valve on the dump line and shut it down just a tad. That will cause the resistance you are looking for to get the water to go to the headers.
I would not bother with cooling the v drive. Unless you are going endurance racing you just don't need to. It's like the rear end in you car. 2 big gears and 90WT oil.
The v drive install looks pretty cool. I like those braces. Is that rod that goes through the v drive mounting plate the control rod for the cav plates?

[Chief]

yes that is the one that goes to the cav plate. There is another for the steering also. Ill try to get some other pictures this weekend. By the way who would sell a ball valve such as that?