Does anyone know how to "pull" the fan from the shaft or the pullie
from the shaft without breaking either? Also where can i post my
restoration pics?
cooling fan
Re: cooling fan
as far as I know, you need to support the pulley and press out the
center shaft ftont the fan side.
Colin
or you can get a free fan assm from me.
center shaft ftont the fan side.
Colin
or you can get a free fan assm from me.
-
whitessports39
- Posts: 0
- Joined: Wed Mar 12, 2008 10:26 pm
cooling fan
anyone removed the cooling fan without overheating problems?what do you
think the horsepower gain is?ever seen a electric fan for cooling
assistmay work fine but can the electrical system accept the extra
amp.draw on the system?oh what the heck i'll just install nitrous& be
done with it.love this little car just bought it from a texas owner who
rather sold than rebuild the mill.no seat time yet but can;t wait! BOBS
LONG ISLAND 600 SHOP.
think the horsepower gain is?ever seen a electric fan for cooling
assistmay work fine but can the electrical system accept the extra
amp.draw on the system?oh what the heck i'll just install nitrous& be
done with it.love this little car just bought it from a texas owner who
rather sold than rebuild the mill.no seat time yet but can;t wait! BOBS
LONG ISLAND 600 SHOP.
Re: cooling fan
I've driven a Honda 600 without a fan during the winter and did not experience any problems. But I would not recommend doing it. In my case, the fan housing was loose and I needed to use Heli-Coils to fix the problem. I was driving the car to work, it was winter, the outside temperatures were at 40 or less, I was going to be on the freeway most of the trip with very little time spent stopped at idle. I took the fan housing off, cleaned the engine area, and used the car. I had no problems and the few times I was stopped for an extended length, I shut off the engine. For me it was more of an experiment and I was willing to accept the consequences (i.e. seized pistons, damaged cam).
The topic of using an electric fan has come up before and many on this post seem to think it will provide a horsepower gain. Unless the fan is off, I still believe adding an electric fan will decrease your available horsepower at the wheels when the fan is running. Feel free to tell me the flaw in my thinking....here goes.
I looked at a Mr Gasket cooling fan and noticed it was rated at 12 volts and 10 amps. That would be 120 watts (12 volts X 10 amps = 120 watts). One horsepower is equivalent to 745 watts. So, the electric fan requires about 1/6 horsepower to operate (120 watts/745 watts is approx 1/6 hp). Do you think the mechanical fan on the 600 is using 1/6 hp? Do you think I am trying to blind you with math and science? Do you think you are strong as an ox? Then try this to convince yourself.....
Take an automotive alternator (like the type you see on a Ford, Chevy, Honda Civic) and put one on your workbench. With nothing connected, notice how easy the shaft spins. Now connect your Honda 600 fan assembly with its fan belt and set the tension low like you would on the car. Try spinning the alternator shaft with your hand and watch how easy it spins and how you can make the fan blade turn. You may not be turning the blade at the same speed as the engine but imagine if you hooked it up to bicycle-type system? You can probably envision a way to get it going faster using human power.
Now take your alternator and hook it up to the 120 watt electric cooling fan (depending on the alternator, you may need to add the rectifier) or hook it up to some auto headlights (rectifier not necessary). Try spinning the alternator shaft and let me know if you can get any light out of the headlamp or get the cooling fan to spin without breaking into a sweat. And feel free to hook up a bicycle-type system so you can use leg power to spin the system. This exercise should give you an idea of how much effort is required to produce 1/6 horsepower (yeah, one horsepower is really a lot of power. Horses are stronger than humans).
So, if my Honda 600 mechanical fan is so good, why are new cars using electric fans?
1) the electric fans use a thermostat and only activate when additional cooling is necessary.
2) at high speeds, the air flow across the engine may be sufficient to cool the engine without use of the fan. By letting the fan "freewheel", it doesn't disturb the air flow across the engine as much as a fan which is being driven. This leads to better cooling.
3) the electric fan may be safer, more cost effective, and easier on the design for the manufacturer. They don't have to design in extra belts and pulleys.
4) my Honda 600 fan is good for the Honda 600 but most cars have used mechanical fans which have placed a higher load on the engine. I think you can find mechanical fans on cars which do use more power than an electric fan but I do not believe this to be the case with the Honda 600.
5) some drag racers like to use electric fans instead of mechanical fans run off the engine. I can see this since they don't want to waste any of their engine horsepower to drive a cooling fan. If they are doing it right, the electric fan they are using is driven off a dedicated battery which is not "stealing" power from the engine. What about the extra battery weight? Well, they have to meet a minimum weight requirement anyway and if they did not have the battery, they would be attaching some lead or iron weights to be legal.
let me know if you can find any flaws in my thinking..... I am still teachable.
Dale
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The topic of using an electric fan has come up before and many on this post seem to think it will provide a horsepower gain. Unless the fan is off, I still believe adding an electric fan will decrease your available horsepower at the wheels when the fan is running. Feel free to tell me the flaw in my thinking....here goes.
I looked at a Mr Gasket cooling fan and noticed it was rated at 12 volts and 10 amps. That would be 120 watts (12 volts X 10 amps = 120 watts). One horsepower is equivalent to 745 watts. So, the electric fan requires about 1/6 horsepower to operate (120 watts/745 watts is approx 1/6 hp). Do you think the mechanical fan on the 600 is using 1/6 hp? Do you think I am trying to blind you with math and science? Do you think you are strong as an ox? Then try this to convince yourself.....
Take an automotive alternator (like the type you see on a Ford, Chevy, Honda Civic) and put one on your workbench. With nothing connected, notice how easy the shaft spins. Now connect your Honda 600 fan assembly with its fan belt and set the tension low like you would on the car. Try spinning the alternator shaft with your hand and watch how easy it spins and how you can make the fan blade turn. You may not be turning the blade at the same speed as the engine but imagine if you hooked it up to bicycle-type system? You can probably envision a way to get it going faster using human power.
Now take your alternator and hook it up to the 120 watt electric cooling fan (depending on the alternator, you may need to add the rectifier) or hook it up to some auto headlights (rectifier not necessary). Try spinning the alternator shaft and let me know if you can get any light out of the headlamp or get the cooling fan to spin without breaking into a sweat. And feel free to hook up a bicycle-type system so you can use leg power to spin the system. This exercise should give you an idea of how much effort is required to produce 1/6 horsepower (yeah, one horsepower is really a lot of power. Horses are stronger than humans).
So, if my Honda 600 mechanical fan is so good, why are new cars using electric fans?
1) the electric fans use a thermostat and only activate when additional cooling is necessary.
2) at high speeds, the air flow across the engine may be sufficient to cool the engine without use of the fan. By letting the fan "freewheel", it doesn't disturb the air flow across the engine as much as a fan which is being driven. This leads to better cooling.
3) the electric fan may be safer, more cost effective, and easier on the design for the manufacturer. They don't have to design in extra belts and pulleys.
4) my Honda 600 fan is good for the Honda 600 but most cars have used mechanical fans which have placed a higher load on the engine. I think you can find mechanical fans on cars which do use more power than an electric fan but I do not believe this to be the case with the Honda 600.
5) some drag racers like to use electric fans instead of mechanical fans run off the engine. I can see this since they don't want to waste any of their engine horsepower to drive a cooling fan. If they are doing it right, the electric fan they are using is driven off a dedicated battery which is not "stealing" power from the engine. What about the extra battery weight? Well, they have to meet a minimum weight requirement anyway and if they did not have the battery, they would be attaching some lead or iron weights to be legal.
let me know if you can find any flaws in my thinking..... I am still teachable.
Dale
It's Tax Time!> anyone
> removed the cooling fan without overheating problems?what do you > think the > horsepower gain is?ever seen a electric fan for cooling > assistmay work > fine but can the electrical system accept the extra > amp.draw on the > system?oh what the heck i'll just install nitrous& be > done with > it.love this little car just bought it from a texas owner who > rather sold > than rebuild the mill.no seat time yet but can;t wait! BOBS > LONG ISLAND > 600 SHOP.
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