<VV> Balance point for power pack

[William Hubbell]

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Bill

> On Jan 11, 2020, at 2:06 PM, hallgrenn--- via VirtualVairs <virtualvairs at corvair.org> wrote:
> 

?Good points.Thanks Jim.  
Bob Hall


-----Original Message-----
From: Jim Becker <mr.jebecker at gmail.com>
To: hallgrenn <hallgrenn at aol.com>; virtualvairs <virtualvairs at corvair.org>
Sent: Sat, Jan 11, 2020 11:16 am
Subject: Re: <VV> Balance point for power pack

With a total weight of 460# or so, the weight of various bolt-ons isn't 
going to move the center of balance very much.  The starter is forward of 
the balance point with the others mentioned behind it.  They tend to cancel 
each other out.  The biggest difference would probably come from which 
transmission is attached and whether a generator for an early model is in 
place of not.

The big lifting point on the top/front of the bell housing is the 
approximate balance point if an early model rear crossmember and suspension 
is also attached.

Jim Becker

-----Original Message----- 
From: hallgrenn--- via VirtualVairs
Sent: Friday, January 10, 2020 11:26 AM
To: virtualvairs at corvair.org
Subject: Re:  VirtualVairs Digest, Vol 180, Issue 14


  4. Re: Balance point for power pack (jvhroberts at aol.com)
  5. Re: Balance point for power pack (Jim Becker)


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In Reference to the balance point question, I recently used my hoist to move 
a 1968 110 PG powerpack using the bell housing lift boss/hole AND the engine 
rear mount bracket.  I had already removed the starter, carbs and 
alternator, but the exhaust manifolds and exhaust pipe and muffler were 
still attached.  My feeling (and just my feeling) was that if the starter, 
alternator and carbs had been installed, but NOT the exhaust pipe and 
muffler it would have been close to balancing on the bell housing lift 
point.  If I ever do it again I plan to confirm.
Bob Hall


Message: 5
Date: Fri, 10 Jan 2020 09:39:08 -0600
From: "Jim Becker" <mr.jebecker at gmail.com>
To: "John Gull" <johngull at me.com>,    <virtualvairs at corvair.org>
Cc: "John Gull" <johngull at me.com>
Subject: Re: <VV> Balance point for power pack
Message-ID: <B37BEE03BC934C2A9FED496C9D248A9E at JimDesktop>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
    reply-type=original

Quoting the '60 Shop Manual, "The center of gravity or balance point of the
complete power train is located approximately .200" behind the front face of
the cylinder block."  I assume this is with a 3-speed manual transmission.
A Powerglide only adds about 20# to the 460# of the complete unit, so I
wouldn't expect that option to move it much.  Other variations of
engine/transmission shouldn't have much effect either.

I find it somewhat amusing that they say "approximately" then quote the
position down to one thousandths of an inch.

Jim Becker

-----Original Message----- 
From: John Gull via VirtualVairs
Sent: Friday, January 10, 2020 5:42 AM
To: virtualvairs at corvair.org
Cc: John Gull
Subject:  Balance point for power pack

Where is the balance point for the Corvair engine with Differential&
Transmission attached? I am thinking where bell housing attaches to engine
block but not sure. Thanks John Gull

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