Flex-a-lite mojave universal heater?

[allen dodson]

does anyone know anything about this mojave universal heater? I am thinking of buying one for my 521 cause iam sick of the weak heating system. It has goo reviews but was curious what fellow datsun dudes think of it?

[slodat]

I'm going to run an aftermarket heat and a/c system in 521. I'm a few months away from that point though..

[allen dodson]

Yeah iam thinking of ordering that flex heater. I broke me heater core and could have it rebuilt. But it never blew warm any way.

[slodat]

Everything I have heard is that the stock 521 is undersized..

[mklotz70]

The biggest prob with the 521 setup is that the air flows too fast through it. Have you ever noticed that the defroster puts out warmer air than the heater? The extra length of the def ducts slow the air down so it goes through the heater core slower. When it's set to "floor", the air runs through the core unrestricted. When I taped up the fresh air vent to keep water from getting in(trying to find a cab leak), I opened up the vent to the cab. So when the fan got turned on, it pulled the air from inside the cab, pushed it through the core and it warmed up the cab nice and toasty. So....if you can restrict or eliminate the cold air intake during the winter months, it heats up nicely. Of course....I had already pulled it apart and blew out all the debris that was plugging everything up.

[Llittle_Llama]

i have thought about running one, not for the reason you are, but it would allow a cleaner engine bay and less to go wrong with the cooling system.