<VV> moaning

[James Davis]

The modifications to the gas heater is detailed in the September, 1960 
issue of the Service News.  As I do not have any issue before October 1960, 
I will include the December, 1960 notes for the Corvair 95.  "To reduce 
combustion noise two tuning holes must be drilled in the gasoline heater 
exhaust pipe.  The holes should be 1/8 inch in width and 1/4 inch 
long.  The first hole should be 1/2 inch past the 70 degree bend and one 
inch before the cross frame clamp.  The second hole is located 1/2 inch 
past the cross frame clamp."   As I remember it, it was the upper clamp; 
but obviously, it is the lower clamp.  As I have a gas heater in a FC, it 
doesn't matter where; but it would in a car.
Jim Davis


At 01:49 AM 2/7/2005, Dave Ziegler wrote:
>Wouldn't that dump exhaust into the trunk? Or do you mean the front 
>clamp(bracket) under the car? It already has a 3/16" hole in front of both 
>brackets. The moaning didn't go away after a 1/2 hour running in the shop, 
>shouldn't that be hot enough?
>Thanks for the input Jim,
>Dave.. .
>On Feb 6, 2005, at 12:11 PM, James Davis wrote:
>
>>To those of us who worked with B-57's and F-105 that sound is very 
>>evocative.  GM fix (in a tech bulletin) was to drill a 1/8 inch hole in 
>>the exhaust pipe just past the upper clamp.  By-the-way the moan goes 
>>away as soon as the exhaust heats up.
>>Jim Davis
>>
>>
>>At 01:57 AM 2/6/2005, Dave Ziegler wrote:
>>>I hate to interrupt this FASCINATING discussion on the Communique and/or 
>>>the techni-color pushrod tubes but I have a real Corvair question. I 
>>>just finished installing a NOS gasoline heater in my 1961 coupe. 
>>>Everything works fine except whenever the burner comes on there is a 
>>>moaning sound. Anyone know why? or better yet the cure? Kinda sounds 
>>>like Docs girlfriend  ggggggggggg
>>>Thanks, Dave.. .
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