Electric Fans--Too hot

I have a puller with an honda aluminum radiator (also electric water pump-Thermostat removed-Ball valve in line so i can restrict the water if i have to) with a electric fan pulling air thru radiator onto the motor. Still getting hot when i pull back to back classes. Could i put another fan pushing air thru the radiator. Would that help cool the water temp down?

Also i have read the debate of water flowing to fast/to slow. I put the ball valve in line so if needed it was already there, I cant seem to see any difference. Has anyone done this or could shed a little light on this.

Thanks
 
How big a puller? What is the Honda radiator out of? i will guess, and I have spent quite a lot of time with special radiators and experimental engines, that you don't
have nearly enough cooling. Remember that the Honda radiator was designed with a lot of high velocity air and you can be real sure that they just didn't say "this looks
good and fits well" A lot of design time went into all aspects of cooling. Put the highest capacity radiator you can fit in.
 
Is the internal bypass blocked off? If you are not running a thermostat and have not taken additional steps, chances are you are bypassing internally. The biggest radiator in the world will not keep it cool if you are bypassing. This assumes that you are not hard blocked and are still running water in the block...

Regards,

Goldsburg
 
I took the water pump off and make a cover with a hose barb over inlet hole And did the same thing with the thermostat housing. Where is the internal bypass and what step do I need to take to close it off
 
you probably have one of the fans blowing the wrong way.unhook the one on the inside of radiator.only use the one infront of radiator and have it blowing air into the radiator and see what happens. I think you have the two fighting against each other...make sure the fins are turning the right way,if they aren't,unhook the wires and swap them around to make the fins turn the other way...makes a huge diffrence
 
Is the ball valve on the inlet or outlet side of the
radiater? I would think youd want it to slow water
coming out giving it more time to cool.
 
also,you need to now take off the rubber gasket on the radiator cap,and probably the spring also,since tou took off the water pump and thermostste.
 
(quoted from post at 16:15:48 07/28/15) I have a puller with an honda aluminum radiator (also electric water pump-Thermostat removed-Ball valve in line so i can restrict the water if i have to) with a electric fan pulling air thru radiator onto the motor. Still getting hot when i pull back to back classes. Could i put another fan pushing air thru the radiator. Would that help cool the water temp down?

Also i have read the debate of water flowing to fast/to slow. I put the ball valve in line so if needed it was already there, I cant seem to see any difference. Has anyone done this or could shed a little light on this.

Thanks

Fans and pumps work better pushing instead of pulling. As previously stated there is not enough heat exchanger area nor enough pounds of air over the fins per minute.
 

I used a Honda Civic radiator for a little while some years back. I couldn't get it to cool the tractor.
 
the way you described this,it sounds like you have it the way the old farmall a,b ans c tractors are.radiator pressure cap needs to be gutted out.without a water pump,the cap is to tight,and radiator fluid will find its own height in radiator,dont fill it to high.
 
called thermosyphon,,,look it up on this site,it will tell you more.and make sure you have fan blowing the correct way.
 
If you have problems only on back to back pulls, have you thought of running an electric water pump also? Fan is only trying to cool the radiator water. Circulating the water will balance the temperature better.
 
Been there done that. Honda wouldn't cool mine, bought a griffin alum rad for rat rods from summit racing for around $230. I also took off the electric fan and now using the stock fan ran off water pump. Temp does not get over 180.
 
(quoted from post at 13:15:48 07/28/15) I have a puller with an honda aluminum radiator (also electric water pump-Thermostat removed-Ball valve in line so i can restrict the water if i have to) with a electric fan pulling air thru radiator onto the motor. Still getting hot when i pull back to back classes. Could i put another fan pushing air thru the radiator. Would that help cool the water temp down?

Also i have read the debate of water flowing to fast/to slow. I put the ball valve in line so if needed it was already there, I cant seem to see any difference. Has anyone done this or could shed a little light on this.

Thanks
644 ci, 10.5:1 comp ratio, 3 gal total cooling capacity, 55 gpm EMP/Stewart water pump, 14" 2450 cfm fan pulling air out front, 20 psi cap, runs 205 deg at end of pull, cools right back to 180 going to trailer or scale. Restrictors or valves in performance engine cooling systems tend to be a crutch for some other issue.
 
Are you putting and taking the water in
and out the front? Can't do this with low
volume. Will need to put water in back of
head and take it out front. Probably need
two of those little Honda radiators. Can't
you buy them for less than 100 including
fan. Just stack them.
 
What is the gallons per minute? The radiator should be big enough for that engine. The GPM shouldn't be over about 12. Even if you shut the ball valve down it's just going be create more pressure. Are you leaving the pump and fan running when you shut it off?
 

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