[FC] Vacuum advance issue -

[N2VZD at aol.com]

I do not think the 900 series advance units are  corvair  if  it makes that 
much difference.
I am not near my books
regards, Tim Colson
 
 
In a message dated 8/29/2012 2:50:19 P.M. Eastern Daylight Time,  
Mikeamauro at aol.com writes:

"...Then  when I hook up the vacuum advance line from the carb, I  
immediately  get at least 10 degrees of advance at idle..."

Sounds like you not  connected to the ported vacuum... you should  be (this 
connection at  carb has no vacuum signal at idle), or the idle  adjustment 
is 
set  too high (simulating an off-idle condition, and thus vacuum is  
present  
at ported, port).

Mike Mauro 


In a message dated  8/29/2012 1:11:16 P.M. Eastern Daylight Time,  
jeffbrylow at gmail.com  writes:

Folks -  First issue - I've been attempting to dial in the  engine in my  
'64
Greenbrier for some time now and have an issue that  has me stumped.  Quite
simply the vacuum advance seems to be  performing too well! I'm  
experiencing
hesitation on take off and I  believe excess spark advance may  be the 
issue.

With the vacuum  line disconnected, as is called for  during the normal
timing  procedure, I can time the engine, vehicle in  drive, right at  13
btdc.  Then when I hook up the vacuum advance line  from the  carb, I
immediately get at least 10 degrees of advance at idle.  I've  tried  three
different advance units all with the same   results.

Some facts to help with any offers of help    -

Engine  code- "ZB"  '61 - '62  80 hp

carb  codes  - left bank 7020101 / right bank 7019110

distributor - #  1110272 /  vacuum advance #951

head # 3786588.

Second issue  (related to  first issue?)  - I'm only seeing 5-7 in. hg at  
the
carbs with my  vaccum gauge and the truck actually seems to run  quite well
here. This is  with the curb idle set at 1-1/2 turns in per  factory 
setting.
Many sources  state we should see 14-18 in  hg.
.
Third  issue (question) - I ran  a compression test  recently - results  as
follows - #1 - 140# , #2-  145# , #3 -  142# , #4 - 141# , #5 - 157# , #6 -
140#. These numbers seem a  bit  high to me. Are these numbers normal for a
80 hp.   engine?

Thanks,

Jeff B. - Wisconsin

'64 Monza   sedan

'64 Greenbrier

'62 Greenbrier Deluxe (running parts   car)
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