The cooling fan does not turn fast enough at slow speeds to force heat into cabin so I added an inline blower connected to a toggle switch under the dash to get more heat.
I purchased a 3 inch blige blower at a boat yard and connected it to the fan shroud and heater hose with steel 3 inch to 2 and 1/2 inch exhaust reducers which I had to shorten to fit.
The blower is rated to take 165 degrees F. and I have taken two 20 mile trips in 80 degree weather with no sign of melting or malfunction.The fan shrould doesn't get that hot. The blower only draws 4 amps-I fused it but a relay is not necessary. I wired it to ignition switch so if I forget to turn off it wouldn't kill the battery.
It definitely blows air into cabin with the engine off but I will have to wait until cooler weather to see how effective it is.
Pictures below.
Joel
