Durbans radiator con progress

[durban]

what you see is real & not a Hollywood movie ,ha ha, I found an old washing machine on the dump striped it & put it to good use , for the time being this is my water pump & my radiator , to check if my conversions ive done inside the exhaust block , engine block , cylinder head , cylinder head cover is working according to my plans ive got in my head , so far so good , no leaks , no pressure build up the water is going every where it has to go to keep it cool , ive put air release holes in all the areas to check if the water is getting in to the system ,once satisfied i put plugs in , now what ive done the water flows through the system a little different than the impeller system , the thermostat is in its original position , its releases the hot water out only when it gets to temperature , wires & pipes every where , but iam so far happy every thing is working , because the impeller is still going to be incorporated into this motor , should the radiator system fail out at sea, then its just a matter of opening & closing valves , & off you go again before i go to the next stage .

 

[durban]

Re: Durbans radiator con progress

progress so far every thing i had to do inside the block ,cylinder head & cover has been done , today painted the power head , & under coat the cylinder head , which will be painted jet black , using my special formula , will keep updated as i go along
http://forums.iboats.com/showthread.php?t=530630

 

[Sandor27]

Re: Durbans radiator con progress

One thought regarding the impeller. Do you have an open vent above the impeller so it can fill with water?

If it is sealed with the valve, you could be running with a dry impeller and that would not last long!

Normally the impeller housing fills with water when you put the motor leg in the water because it is vented by the bypass at the thermostat.

This external radiator could turn your motor into a mudmotor! Google "Mudmotor".....

 

[DargelJohn]

Re: Durbans radiator con progress

Cool looking project. I have a couple of questions.
Separate water pump for circulation or rerouting the original pump flow? If separate pump, how do you keep the original water pump impeller lubricated/cooled if water is not flowing through?

What type of radiator are you using (car, motorcycle)? Thermo electric fan cooling?

Good Luck

 

[durban]

Re: Durbans radiator con progress

the plan i have is to run the motor with a aluminum motorcycle radiator & fan this will be fitted under the cowling cover in front of the carburetors some small modifications to be done , the other plan that will be incorporated to the motor is to still have the impeller in the leg , now i know that the motor cannot run on the radiator without water to the impeller , so for the time being i will get it to run on the rad first & remove impeller , once iam happy , the impeller will be fitted , the water will go out to sea while running on the rad . if the temperature gauge shows an increase in temp , then just opening & closing valves to get the impeller to pump water into the motor , i have done some modifications inside the motor to get this to work so far , & have also improved on the water system of these 70hp motors , those that know these motors well will know what iam refering to , water getting into ports etc,

painted cylinder head today

 

[durban]

Re: Durbans radiator con progress

One thought regarding the impeller. Do you have an open vent above the impeller so it can fill with water?

If it is sealed with the valve, you could be running with a dry impeller and that would not last long!

Normally the impeller housing fills with water when you put the motor leg in the water because it is vented by the bypass at the thermostat.

This external radiator could turn your motor into a mudmotor! Google "Mudmotor".....

yea , i have read that on google , who knows , one thing leads to other things , like they say one door closes & another opens , cheers

 

[durban]

Re: Durbans radiator con progress

some of my work on these 70hp motors , regarding water flow & solved some problems
http://forums.iboats.com/showthread.php?t=528873

 

[durban]

Re: Durbans radiator con progress

the leg i desalted yesterday using my NITRIC ACID FORMULA got a first under coat of my special EPOXY PAINT FORMULA to day , i bought a radiator from your country a few days ago , waiting for it to arrive . photo shows my desalting tray with some parts in
http://forums.iboats.com/showthread.php?t=527764

 

[durban]

Re: Durbans radiator con progress

iam going to enlarge the exhaust box to get more water in there ,by doing this cut up another one gona place it ontop of the existing one this way more water is in the exhaustbox keeping it cooler , because the gap between the outer cover & manifold box is just about 1mm & it heats up quick by increasing that gap there is more water there gona solve this & myabe the warping too
http://forums.iboats.com/showthread.php?t=566821

 

[durban]

Re: Durbans radiator con progress

today i placed a thread about ltrs per\min , i decided to build my own pump to find whats gona be what , i striped a washing machine to get parts & found a 5ltr container , so this is gona be my temporary pump tomorrow it will work just waiting for silicone to dry then will assemble the motor onto it
http://forums.iboats.com/showthread.php?t=566821

 

[durban]

Re: Durbans radiator con progress

my temporary water pump made from washing machine & 5ltr container & it works

 

[durban]

Re: Durbans radiator con progress

today i went to the dump found an old camping chair an old radiator & a fan , and built this today . the radiator doesn't leak & the fan works & the chair frame came in handy together with my washing machine pump & 5ltr can , i got some good results , after connecting the pipes plug ed 220volts to the pump & 12volts to fan water pumped through motor tomorrow i will start & run it .

 

[durban]

Re: Durbans radiator con progress

i fitted another pump from a washing machine this one works better & changes some hoses

 

[durban]

Re: Durbans radiator con progress

progress on my new motor cover

 

[Scott Danforth]

Re: Durbans radiator con progress

I applaud the creativity, however I think you will find your radiator a bit on the small side.

 

[durban]

Re: Durbans radiator con progress

thank you , leave the rest to me i will show you , its called kiwi ingenuity .

 

[Scott Danforth]

Re: Durbans radiator con progress

its called thermodynamics and fluid management. boats generally have the largest radiator in the world - the water.

Heat transfer coefficient for some common fluids:

Air - 10 to 100 W/m2K
Water - 500 to 10 000 W/m2K

that being stated, you can cool a 300hp engine with a 4" diameter x 20" long heat exchanger and to cool the same engine with air, your looking at about 8 sq ft of radiator face and a mechanically driven fan because electrically driven fans can not move enough air.

 

[durban]

Re: Durbans radiator con progress

i never went to that school , i just know common sense , that metal is a conductor of heat , i have substituted a few things that are not conductors of heat .

fair enough you have all the fresh water in the world to go boating & dont end up with your motor looking like this , this motor was found on the scrap heap some one through it away becase this is what sea water corroded it look at the holes eaten into it through sea water , so iam just giveing it a nother life to pass on to my grandchildren , cheers

 

[tx1961whaler]

Re: Durbans radiator con progress

Ole Evinrude only had a 3rd grade education, BUT- he did apprentice in a machine shop and study math, mechanics and engineering in his spare time and was a born inventor. You have the born inventor part in great measure.
The math and science stuff (like thermodynamics) are merely tools to use to make the invention part easier and quicker.
Unfortunately, there is a paradox involved. In the process of gaining all of the math and science and engineering knowledge, in many cases the inventiveness (creativity) part is greatly reduced or stunted through the education process. Most engineers are not inventors on a large scale.

That said, your particular large problem is to get a great amount of heat from one place (the motor) to another place (the air or the ocean). You are using water or a water/glycol mix to move the heat around. "X" Watts of heat from the motor need to get moved from the motor, into the water, into the radiator, and exchanged into the air. If you know the volume of water (and pressure and velocity; all related) moving through the radiator you can figure out how much heat is exchanged with the air at different ambient temperatures and with different air flows (also a velocity/volume problem) through the radiator.

As to the real problem you're trying to solve, the "salt water motor slowly dissolves over time" problem, I currently run 3 motors over 40 years old that ran in salt water at least 25 years. The secret to that was WD40 in a spray bottle by the gallon and faithful flushing with "Whaler's secret formula". Dawn dishwashing liquid.
Good luck, and keep up the inventiveness and curiosity!

 

[Haffiman]

Re: Durbans radiator con progress

One thing that may have to be taken into consideration in this re-invent, is the amount of epoxy used to paint all the cooling channels. This will have a significant effect on the heat transfer from combustion to cooling medium (water) as it will be working almost as insulator between the bare metal and the water.