<VV> Fans....!

[kevin nash]

Moderate gearing down of the pulley ratio, like 1.25:1 can supposedly be done by a larger fan pulley, and

re-aiming the alternator and idler outwards with shims. I think it works better when a different belt size is

used though although I've not tried this. The usual bugger when gearing down the stock fans is that you do lose cooling...it is not a big deal if you don't get carried away with it, because belt slippage is also reduced,

so that compensates somewhat for the slower fan speed. The cooling loss will be noticeable when it gets

too hot out, and you are going too fast going up too steep of a hill!

Kevin Nash


________________________________
From: Eric Kirven <efki at verizon.net>
Sent: Wednesday, November 15, 2017 3:30 PM
To: Hugo at aruncoaches.co.uk; wrokit at hotmail.com; virtualvairs at corvair.org
Subject: Re: <VV> Fans....!

If you put a bigger pulley on it what happens to the geometry of the belt?
Bigger vibration damper? How would you move the idler pulley and the alternator out?
Just wondering.

Eric


-----Original Message-----
From: Hugo Miller via VirtualVairs <virtualvairs at corvair.org>
To: kevin nash <wrokit at hotmail.com>; virtualvairs <virtualvairs at corvair.org>
Sent: Wed, Nov 15, 2017 2:31 am
Subject: Re: <VV> Fans....!

### That's what I said - put a bigger pulley on it! ;)

-----Original Message-----
From: kevin nash via VirtualVairs
Sent: Wednesday, November 15, 2017 4:07 AM
To: virtualvairs at corvair.org<mailto:virtualvairs at corvair.org>
Subject: Re: Fans....!


I just wanted to point out that I designed my fan to hopefully solve the
unique cooling challenges involved

with turbo corvairs, and as such, the expected output is considerably higher
than most N/A corvairs, even the hopped up ones, really need. As such, the
best way to set this fan up for most street cars is to run it geared down,
probably right around 1:25:1, and it will still have more cooling than the
stock set-up, but use dramatically less power, because of the gearing and
much improved efficiency. So, while the good idea

of a hydraulic drive does have some serious attractive features, especially
if it had a nice feedback/temperature management system to keep the heads at
a constant temperature irrespective of engine rpm and load, I'm pretty
certain that most will find that the simple old stock mule drive is going

to work quite nicely with my fan. I cant wait to get this thing and my car
and test it for real!!

Kevin Nash
63 Turbo, port injected EFI,

currently apart



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