<VV> Air flow question

[tkalp at cox.net]

Jim,

You have gotten pretty good advice.  Here is my experience.  My first V8 
Corvair was a Crown conversion with the radiator mounted horizontal in 
the original engine compartment, with three fans.
http://v8vairs.com/images/KalpTerry/terrykalp.htm
It cooled fantastic at idle, but at highway speeds you had to run all 
three fans to keep it cool.  Running 70+ on a 90+ degree day the temp 
gauge would start to slowly creep above the 210 mark. The fans were 
flowing air down thru the radiator.

My present V8 Corvair is a Kelmark conversion with a front mounted 
radiator, two large intakes under the bumper and a couple of 8 square 
inch openings in the front panel and a "manly" air dam. It has one older 
electric fan and it cools just fine. The fan is not necessary at highway 
speeds.
http://members.cox.net/tkalp2/kv8.htm
It will lift the unlatched engine cover at speed also.

 From my expeience it is a lot easier to get a front mounted radiator to 
cool. Several people have make rear mounted radiators work.

Bill Bertram uses a vertical mounted rear mounted radiator, but has 
built scoops to pull air up from under the car to the radiator. The 
builder of the 3.5 Cad V8 told me at the Detroit convention, that adding 
scoops to pull air from under the car lowered temps by 40 degrees.
http://v8vairs.com/images/BertramBill/billbertram.htm

Hope this information helps some. V8 Corvairs are a lot of fun.

Terry Kalp
Wichita, KS
On Sat, Sep 12, 2009 at 3:45 PM , Jim Briggs wrote:

> I'm trying to figure out if the air pressure over our LM air intakes 
> behind the rear glass is +positive or -negative and how much.
> I've looked at the pictures on AeroNed's site but they are not 
> diffinitive. I've even tried my own rudimentary string test.
> Has there been any measurement testing done out there? I'm trying to 
> determine which way to flow the air through the horizontal radiator 
> above the transaxle on my rear engine V8 project. It's obvious that 
> with a closed engine compartment
> our air cooled Vairs can "pull" enough air for cooling but I'm trying 
> to figure out if there is significant positive pressure aiding the 
> cooling fan?
>  Thanks for any help!
> Jim Briggs
> 65 coupe & sedan
> 66 Corsa V8
>
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