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Re: [GMCnet] WE ALL NEED MORE AIR [message #321604 is a reply to message #321600] Thu, 03 August 2017 19:21 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Ken,

I may be confused but doesn't Tom's design connect ducts from the floor to the BACK of the HVAC box?

My question meant to find out why not just bolt the blower directly to the back of the HVAC box?

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken Henderson
Sent: Friday, August 4, 2017 9:24 AM
To: GMC Mail List
Subject: Re: [GMCnet] WE ALL NEED MORE AIR

I'll answer that, based on my complete redesign & construction: First off,
in Tom's case, he didn't want to build a new HVAC box, which would be
required to provide room in front of the existing box for the blower.
He might, of course, have hung the blower below the box and only had one
bend in the air flow, but that would have partially obstructed the radiator.

Most importantly, for Tom's and My mods: The problem of providing supply
air to the blower. With the blower out front, where we'd really like it to
be for most-linear air flow, one would have to provide ducting from the
cockpit out to and completely surrounding the blower. A BIG fabrication
job.

If you look at all of the dual blowers, you'll see that they all induct air
to the wheels from both sides -- the outside and around the center-mounted
motor. I seriously consider closing the motor side and using round ducts
into each side, but finally figured out that the wheels would be seriously
starved for supply air.
Among other strikes against the idea.

Tom, feel free to supply your own reasons if this doesn't cover it.

Ken H.


On Thu, Aug 3, 2017 at 6:35 PM, Rob Mueller wrote:

> Tom,
>
> Your mod is quite clever, I was wondering why you didn't attach the blower
> directly to the back of the A/C plenum?
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
 
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