<VV> Cooling the Corvair Engine

[Matt Nall]

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.