Don't care about heat. Don't care about A/C, but would like to de-fog my windshield.
What do i do? Would prefer to NOT run an actual coolant-filled heater core of any kind.
Don't care about heat. Don't care about A/C, but would like to de-fog my windshield.
What do i do? Would prefer to NOT run an actual coolant-filled heater core of any kind.
In the Civic it took a good bit of heat to keep the windshield clear especially in a rain shower. We used the stock heater box with a bilge blower ducted into it. Simple and fairly easy. I'm not sure how you would do that without some sort of heater core.
How about ducting heat from under the hood with a damper of some sort to shut off the airflow?
I have seen people use a rag on a stick. 
Ducting heat in from the engine bay is probably a good way for me to poison myself. 
Run exhaust pipe to the exit in front of drivers windshield. though I would not recommend that because of risk of death.
But the easiest option would be the Mojave heater from Flex-A-Lite, even-though it is a coolant based system.
for electric I found these they only will do like 240 w of heat so less than a hair dryer http://www.harborfreight.com/12v-auto-heater-defroster-with-light-60525.html
though you get one of those aftermarket kits made for the rear window like so.http://www.frostfighter.com/clear-view-defrosters-about.htm
however it would be like driving with a screen door in front of you.
12v hair drier?
Go to a school bus store and buy a fan like they used to have when I was a kid, or leave enough of the heater box in there to have a proper heater.
I'm always in favor of leaving the heater core in place, since it makes for a nice little supplementary radiator.
MrChaos wrote: though you get one of those aftermarket kits made for the rear window like so.http://www.frostfighter.com/clear-view-defrosters-about.htm however it would be like driving with a screen door in front of you.
Range Rover Classics actually have wires run through the front windshield for defrost/defogging.
It's cool, and you don't notice it, but it's not something i'm interested in trying.
Streetwiseguy wrote: Go to a school bus store and buy a fan like they used to have when I was a kid, or leave enough of the heater box in there to have a proper heater.I'm always in favor of leaving the heater core in place, since it makes for a nice little supplementary radiator.
Leaving heater core in place isn't really an option at this point.
In reply to Swank Force One:
It shouldn't if you pull it from the back of the radiator, unless the radiator blows or something catches on fire. That could be kind of shocking. The rules will probably have a problem with it for sure.
I really don't see how you will get enough heat on the windshield without using engine heat.
To clarify, i'm really ONLY looking to clear fogged windshield from rain/humidity. Car will not be driven in freezing temperatures.
In reply to Swank Force One:
rain x or a potato rubbed on it?
If RainX will do it, that would be super awesome and we can close this bad boy down.
RainX works unless you have a cool rain shower in the middle of the summer. Then it's whiteout time. The only part of the windshield Curmudgeon could reach was about a 6" patch with the tips of his fingers. He says it's a little hard to hit an apex you can't see it.
We re-plumbed the heater core for the next race.
There used to be little rubber blade fans for windshield defogging.
So don't use the stock heater box. If it is a race car, fab something up while you're building the dashboard and installing the roll cage. Simply add a cheap heater core (i.e. tiny radiator) in a box and blow air through it and onto the bottom of the window using recycled defrost ducting (hell PVC pipe, capped on the end and run under the windshield base with small holes drilled along the edge could work).
More details? If this is a "pre auto-x run" scenario, I vote battery box + AC inverter + hair dryer.
Otherwise, "rag on a stick" has worked well for us at LeChump races.
Tried to run a 318i on a cool (like 40F) damp morning with no heater core. Not only is it tough to hit the apex when you can't see it, its tough to stay on the main straight.
I run a bilge blower that pulls air from the factory fresh air inlet and blows out the defroster vents. Dryer ducting runs between the blower and the lightweight plastic ducting. No heating, just lots of fresh air.
Works pretty well. It didn't work well enough in the hurricane we had during the Targa, but not much would have.
We've installed wipers on the inside of the crap cans. They kick ass.
DILYSI Dave wrote: We've installed wipers on the inside of the crap cans. They kick ass.
I like this answer.
DILYSI Dave wrote: We've installed wipers on the inside of the crap cans. They kick ass.
I remember seeing those and laughing my ass off.
Swank Force One wrote: Don't care about heat. Don't care about A/C, but would like to de-fog my windshield. What do i do? Would prefer to NOT run an actual coolant-filled heater core of any kind.
Buy an electric windscreen. They cost about 1000 UKP (UKLb?) plus shipping, if they make 'em for your car.
Suck it up and put a heater box in your car.
12 volt hair dryers. They're $14 so buy a couple. Done.
Fog? Polish it with dawn.
Defrost ice? Carry a spray bottle of rubbing alcohol or cover it with a tarp.
If you are racing in freezing conditions install a wired rear window defroster on the windshield. They sell them as a stick on.
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