<VV> typical idle vacuum reading?

[Mark Durham]

Ray, if its valves, the leaks would be out those pipes, not into the
case. Case pressure is always blowby. Try squirting some oil in the
low cylinders then redoing the compression test. If the comp comes up,
that is verification of bad rings. You could also change the oil to a
heavier weight, say a 20w50, which will help to compensate for bad
rings, it works for awhile.  Mark Durham.

On Wed, Nov 2, 2011 at 7:55 PM, Ramon Rodriguez III
<corvairgrymm at gmail.com> wrote:
> Thanks all,
>
>     It seems I really did need to go back to basics.  The compression test
> showed that the entire left bank has low compression.  Doing the test as my
> father taught me (only four needle bounces then stop) yielded about 90psi
> on the left and 125 on the right.  Cranking till it maxes out shows about
> 150 on the right and 105 on the left.
>
>     Armed with that info I took a look and found that when I balanced the
> carbs I had opened the throttle valve well over 1/16th of an inch on the
> right carb, while the left carb throttle was basically completely closed.
> Vacuum should be 14-18 (found it in the manual and agrees with those who
> replied) at 500RPM, at 650 RPM when I managed to get it stable I was
> getting only 8 or 9 inches.
>
>    I'm completely confident that there is no vacuum leak in the carbs or
> crossover tube (checked it six ways from Sunday), so it's either losing
> pressure out the valves or past the rings.  I'm pretty sure it's going to
> be blowby, if I plug the end of the PCV with my thumb it'll push oil up out
> the dipstick tube in well under a minute.
>
>     I'm going to check the valve adjustment on that side and hope for a
> miracle, but I guess it's time for me to finally do some genuine motor
> work.  I'm pretty sure the engine I recently pulled out of the 62 is in
> good shape so I'm going to swap that powertrain into the 63' while I work
> on fixing the 63 engine.
>
>
> Thanks for all the help guys!
>
> Ray "Grymm" Roddriguez III
> Lake Ariel, PA
>
> This isn't exactly a match, but I get about 16" on the 110 in the '66.  The
>> 102 had a slightly bigger cam, so if you can get 14 or 15", that's probably
>> pretty good.
>>
>>
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