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Discussion Starter · #1 ·
Have any of you guys found a way to improve the heat / AC fan output? I'm thinking about bypassing the "spring / coil" style resistor bar in the dash, or possibly a better design squirrel cage style fan? I've got a 90' RC and I'd love to find a "retro fan" or an improvement that somebody on here has stumbled upon that would let me fly a kite inside my truck when I feel like flipping the switch.. Any ideas?? You'da thought Dodge would have given us the best one they had to offer by design.... Yeah, right.. ;D
 

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have had the same problem.. am going to see if a late mod. blower will work... qp
 
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I opened up the vents in the lower portion of the suitcase with a razor saw. Made a big difference. I wouldn't bypass that resistor unless you want to get real warm from the underdash fire.
 

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Hey PG that would make a great How to for those of us freezing our assses off in the am here where it is cold most ofthe year !!!!!!!!!!!!!!!
 

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BrianT said:
Hey PG that would make a great How to for those of us freezing our assses off in the am here where it is cold most ofthe year !!!!!!!!!!!!!!!
No kidding. My dads 87 has the crappiest heater output.
 

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well, many times the heat output is the heater core being partially plugged, not the fan, or having too low a thermostat in the engine. My truck with a new heater core will sweat you out, even in 0 deg weather.

if you bypass the resistor, you will only have a one speed fan, and you may have a fire. I had a fire on one of my trucks cuz some leaves got against the resistor. it isn't pretty...if you want to see it, check out trcm's trucks in the pics section

You could always wire up a small electric leaf blower to use for your fan.
 
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BrianT said:
Hey PG that would make a great How to for those of us freezing our assses off in the am here where it is cold most ofthe year !!!!!!!!!!!!!!!
Doesn't really rate a how-to, Brian. On my 85 the heat comes out two small, square vents next to your right foot. They seemed too small to me so I used a razor saw to cut out the portion between them, making one large vent. Seems like it pushes more air now.

I'd post a pic, but right now it's snowing and about 0 degrees. :p
 

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This is a topic that interests me,itz been -30C here for a month.Is there a 4 speed fan somewhere?My owners manual sez to open the vent doors for more flow.(Can u say wind chill?)I also have my whole rad blocked off,,just behind the grill,and my temp gauge doesn,t pass 1/4.
 

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Anybody else remember the Corvair gasoline fired heater..?
Install one as an auxiliary !
 

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;)When your in 4wheel for a month and letting her idle for hours a day ,fired aux heat becomes bank loan stuff!
 

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Just recently stepped my blower motor up from 8 volts to 11 volts. just by using a common 4 pole relay. I removed the heater controls and pulled the wire for high speed out of the connector and ran another wire and inserted it into the cavity so that when you turn it to high it will bypass the resistor and use the relay to send battery voltage direct to the blower fan via a wire tapped into the fan motor power wire itself. seems to work good so far and made a big difference in fan rpm's.
 

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Discussion Starter · #13 ·
Trailduster_Rulz said:
Just recently stepped my blower motor up from 8 volts to 11 volts. just by using a common 4 pole relay. I removed the heater controls and pulled the wire for high speed out of the connector and ran another wire and inserted it into the cavity so that when you turn it to high it will bypass the resistor and use the relay to send battery voltage direct to the blower fan via a wire tapped into the fan motor power wire itself. seems to work good so far and made a big difference in fan rpm's.
Cool. I supposed properly fused, there should be no problem. I've mentioned this before and everybody was quick to point out the potential for a fire. I don't think it's a problem as long as the motor is rated for 12 volts, right?
 

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GM has used a hi speed blower relay for thousands of years...Mopar(Trucks) just lets there wiring and connectors melt. It wasnt until around the mid 90's that Mopar started using relays for the high speed function. Use a 20 amp fuse and it could still be wired on the High speed terminal of the resistor block just like the dash switch was as the circuit throught the resistor block for high is just a staright through path.
 

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Smokey said:
Anybody else remember the Corvair gasoline fired heater..?
Install one as an auxiliary !
Or something like the gasoline powered one installed in the tail of a DC 3 !
 

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Smokey said:
Anybody else remember the Corvair gasoline fired heater..?
Install one as an auxiliary !
I do! And I also remember the Eberspacher heater that was installed in the earlier VW's. I was going to put one in my dune Buggy. I think Espar makes some aux heaters now. :)
 
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