Tire Warmers?

Old 03-08-2007, 10:52 PM
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Default Tire Warmers?

ok, i remember a website teaching me how to make tire warmers he used denim and nichrome wire, now im curious if i get some nichrome wire and a much more temp control can i make my own warmers?
with nicrome wire, the stuff i have found is 13.3 ohms a metre now if i my friends tire warmer draw about 3 amps to 4 amps, using ohms law i found at 13.8v and 1 amp (as the w warmers are in parralel) i need 13.8 ohms in each cup which means each cump with 1 metre of nichrome will draw a little over 1 amp altogether in parallel will draw 4 amps?
is this all correct? can i just plug this into a temp cut off unit atach the temp sensor and it will start and stop the circuit as the tires rech desired temp?
any suggestions would greatly be appreciated
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Old 03-09-2007, 12:57 AM
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I made a set of tire warmers using that kind of wire. I too did some calculations but in the end, i got there by trial and error.

pick the amount of wire that you think is necessary. With aligator clips connected to your power supply, see to wich temperature the wire goes. If you want hotter, just move the aligator clips closer and vice-versa.

BTW, i didnt use denim, but coca-cola cans wich i cut using a dremel disk. Denim can get messy if you use tire aditive.

Good luck mate
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Old 03-11-2007, 07:13 PM
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can anyone tell me what current i will need to get the warmers up to about 80'celcius?
cheers,
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Old 03-12-2007, 05:57 AM
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<oblig>1.21 gigawatts!!!</oblig>

good luck with it. sounds like a fun time with electronics.
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Old 03-12-2007, 10:21 AM
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1.21 gigawatts??? surely theres some mathamatical error?
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Old 03-12-2007, 01:50 PM
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1.21 gigawatts, straight into the flux capacitor!
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Old 03-13-2007, 10:21 PM
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Jd


The final temp depends a lot on how the wire is mounted / insultated
The distance between wire turns and heat loss.
your maths are correct approx 1.1 -1.2mt of wire is needed.
adjust as Itchy suggests IE the shorter the wire the more current (more current = hotter) you will also have to allow for volt drop from the Power supply. use 13.2v for calculations

as current increases voltage will drop slightly but you should be in the ball park.

Last edited by Swamp Rat; 03-14-2007 at 06:30 PM.
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