I re thought Staceys comments and decided to route the rad fan B+ wire
under the body again.

Few folks would consider converting from air cooled to water cooled
but for anyone that's done it or is considering it.......

The air cooled cabin heating duct hole below the dash has room not
only for heater core hoses but for wires too. I'll be running my rad
fan B+ through that hole to a spare fuse position on the stock fuse
panel. (now defunct gas heater fuse). Yes there's heat there at times
but all the wires have a loom cover.

I modelled my cooling system on a 1985 1.9 WBX.

In reviewing the wire size between battery and 16 Amp fuse to low/hi
rad fan wiring, it seems that for a 10' run, it might be wise to use a
#8 wire. I'd been using a #10. There were no signs of heat damage
after some years of use. But, Bentley shows a #8 wire between the 30
buss on fuse panel and 16 Amp fuse for rad fan wiring.

My rad fan has never stepped up to the high speed setting but at 12
Volts, 300 Watts (engine off, engine super hot), an online calculator
shows it draws 25 Amps. Depending on parameters used in an online wire
size calculator, I'm seeing either 9 or 8 AWG for 10' of wire.

Neil.

On 8/13/17, Neil N <musomuso@gmail.com> wrote:

> Thanks Stacy. If I'm understanding you correctly, this is what I'd
> originally done; route wire from starter battery, under vehicle,
> behind front grills then in at grommet near the headlight. At fuse
> panel I installed a separate fuse and the relay for the higher fan
> speed.
>

--
Neil n

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