mojave heater or fix original?

I have a 73 with a 65ish tub on it. The PO took the whole heating sysytem out and I need heat up here in Minnesota! Will the 73 heater ***. fit in the 65ish tub w/o mods? Or should I stop wasting time on the original and just buy the mojave heater. The mojave is $160 and I will probably have that in the original after a new heater core and fan. Also there is no vent on the top of the tub buy the windshield, is that original or did someone block it off. I think I need that vent for the defrost to work right. thanks guys for any info!

 

I, personally, am not impressed by the Mojave I installed last fall. I'm in Iowa, so I need heat as well. I believe there is a better set up you can get from Summit racing, but don't ask me brand or anything. The Mojave only puts out like 12000 btu, which sounds like a lot, but really isn't. I know, I drove my Jeep to work this morning

my 0.02

High5

 

Vents weren't used until '72 and up in the cowl. That's why your earlier tub doesn't have one. The '73 heater will fit but holes will need to be drilled for the heater core to pass through the firewall and for the mounting studs. The '71 and older heater mounted to the driver's side firewall and got the fresh air via a duct that went from the grill to the heater inside the engine compartment. Nickmil

 

Thanks everyone! Does the stock system work good? Also, there is what looks like a whole up by the cowl from under the dash, should I punch a hole threw and put a grill over it or get the fresh air from somewhere else? I don't drive it in the winter but would like heat on the cold mornings. Would an aftermarket fit my style better?

 

Weather in Atlanta is pretty mild, with lows occasionally getting down in the teens.

I installed the Mojave w/plenum last year and its been great. Mounted directly under the drivers seat and both ducts aimed upwards. Three speed blower is a lot quieter than stock and much better output. Warms up faster than stock unit. There is a separate 2" outlet on the plenum that makes a great defroster. I attached a four foot flexible hose and you aim it where you need it. With the two vents closed it has an output like a hair dryer on steroids.

My jeep is pretty well sealed up with a Kayline top in good shape and I'm very satisfied with the Mojave. There are larger output units for about the same money (Summit) and I know someone out there makes a 12v electric blanket that might very well be the most bang for the buck.

 

i have had a mojave for a few years.

not really impressed but better thab stock.

there are more after market heaters out there that put out alot more BTUs. i'd look into them.

what t-stat are you gonna run?






*jeep with defroster R) i hear the '07 JK is good

 

except on mine. The "fresh air comes from under hte hood because the plow control spool is in the way of the vent tube.


My factory 70 style heater does a pretty good job of jeeping the interior warm against the jersey winter when plowing. It might not be enough for minnesota though.

 

I don't know what the BTU rating of the stock 72-75 heater is, but I found it satisfactory.

Hope I'm not pointing out the obvious, but there are two sides to the equation - heat created by the heater and heat lost from the cabin. My Jeeps had carpet with jute insulation under it. Both had well-sealed cabins. I expect insulation and air exchange will have as much of an effect on interior temps as stock heater v. Mojave, or Mojave v. other brands. Heating a steel box, or heating a leaky steel and fabric box, is likely about as difficult as staying warm next to a heater in the open air.

You could make a guess at the BTUs of the stock heater by measuring the volume of the stock heater core and comparing it to the volume of the Mojave core.

You also need to keep the engine temperature up. A 195F thermostat is a must. In sub-zero weather, I expect you'll have to cover the radiator to reach operating temps. An electric fan might be helpful, assuming it never turns on at these temps.

If you have a full cab, you could place a second heater under the back seat.

 

As I recall, Summit and Jegs both also have 12 volt seat heater kits. Come with the heating pads for under your seat covers, wiring & switches. Very nice,,they are on my "to-do" list, I plan on installing them in conjunction with a Mojave heater this fall in preperation for winter wheeling once the 'ol CJ is running again. I ran the factory heater in my '80 with fabric half-doors & bikini top for several years, did an ok job at keeping the warm air around the legs, enough to be ok, but definately not comfortably warm. I ripped out the factory heater because it had died and that area of the inside firewall is where I paln on mounting the computer & electronics for my engine swap. I plan on mounting the Mojave in the center. Even a huge output heater will be marginal in an open vehicle at street/highway speeds.

Springfever, I believe it is JC Whitney that has the 12 volt electric blanket that plugs into the cigarette lighter.