<VV> Cooling the Corvair Engine

[Ron]

The 24 blade fan is the original 60-61 fan.  I've been using one of them on 
my Rampside for many years.
RonH

----- Original Message ----- 
From: "Matt Nall" <nalllm at verizon.net>
To: <virtualvairs at corvair.org>
Sent: Saturday, August 04, 2007 5:26 PM
Subject: Re: <VV> Cooling the Corvair Engine


>I was waiting for you to speak up.. I remember our conversation from years 
>ago!
>
> IF  you're not doing high speed shifting...and IF  you have AC...the  61-3 
> fan is the way to go...
>
> I stated the other day...  the difference at IDLE is considerable!
>
> Matt Nall
> All Vairs!
> http://members.aol.com/patiomatt
> Lots of Corvair Technical info!
>
> ----- Original Message ----- 
> From: "James Davis" <jld at wk.net>
>
>> Case in point.  UV #388 with stock 140 exhaust system and de-flashed 
>> heads - could not use full throttle for more than five minutes on a 90 F 
>> degree day (cylinder head temps 480+ F).  Removed the air doors, kept the 
>> lower shrouds, and reversed the cast iron exhaust - 400-450 F degree 
>> cylinder head temps on 90 degree day @ 3,600 rpm full throttle (60 mph) 
>> for 30 minutes.  Replaced the cast iron manifolds and replaced with 
>> Clark's headers (lower shrouds in place) - 300-360 F cylinder head 
>> temperatures on 90 degree day @ 3,600 rpm for 30 minutes  Replaced the 65 
>> fan and top shroud with a 61 radial blade (24 blade) steel fan and 
>> matching shroud - 280-320 F cylinder head temps on 90 degree day @ 3,600 
>> rpm full throttle for 30 minutes  .  Cylinder head temperatures measured 
>> with VDO instruments with thermocouples on both heads in thermosister 
>> location. Same engine, differential and transmission for 79,000 miles.
>
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