<VV> FW: Weird carb problem

[Mark Durham]

Sounds like you've got it under control. What I was having trouble with is
getting the carbs set up so the thing would run right. Even after a detailed
rebuild of both and a replacement of the worn out distributer it ran poorly,
and I found when syncing the carbs the left bubble would osilate up a down a
little and the right would osilate up and down twice as much. It is using a
bit of oil, the two cyls with lower compression are but not fouling the
plugs yet, they just show a different color, and I also have a bit of a
piston slap on both I do not like. I've put a 5W 40 Full Synthetic oil with
the ZDDP in it which helps to plug up the rings. I initially put a 5W 30 in
and it ran like crap, and I could not sync the engine.
So, I'm thinking that I will do a bit of driving this spring, have it
checked out by some more seasoned corvair owners in the area to make sure
what I hear is real, and see what goes from there. If the guys concur with
my suspicions, then maybe this fall I plan for a full teardown and rebuild,
I've got a 64 case that is good for the longer crank and 64 cylinders, so I
am going to put those in and a new OT-20 cam in it, maybe some other
upgrades.  We shall see. It actually runs strong and sounds good under
power, its the extra knocks (and its not valve train, I know what that
sounds like and have used a hearing probe to find the slapping pistons, and
not the fuel pump,)I don't remember my original corvair having. I remember
it being quiet.
Bye for now Mark Durham
On Mon, Feb 8, 2010 at 3:05 PM, Daniel Monasterio
<dmonasterio at hotmail.com>wrote:

> Hi Mark,
>
>    Well... in my case it was on trying to tune GB engine for state
> emissions testing. That´s why I got my own 4 gases "sniffer" and a wide band
> AFR gauge. So, at going to official inspection, my Vairs are pre-tested. No
> big deal at the USA as Corvairs don't need to pass emissions testing in most
> states but here, in my state (Jalisco, Mexico) it is a must to pass
> emissions tests every year on passenger vehicles and twice a year on pickup
> trucks (would like to live in USA, just for this reason).
>    In your case, if your car is not consuming oil, still has good fuel
> comsuption and you feel comfortable with the engine power, live with it but,
> 48 years without a rebuild seems awesome.
>
> Daniel
>
> ------------------------------
> Date: Mon, 8 Feb 2010 14:20:58 -0800
> Subject: Re: <VV> FW: Weird carb problem
> From: 62vair at gmail.com
> To: dmonasterio at hotmail.com
> CC: virtualvairs at corvair.org
>
>
> Daniel, before removing anything and while your next compression test, do
> it once, then put some oil in that cyl and do it again. You can tell if it
> is rings or valves that way. I would still pull the valves and if possible
> lap them in.
>
> What was your initial problem/ i lost the thread, but have gotten very
> interested now I see you have a similar problem as my 102 hp 62 engine. I
> have compression in the 150's accept for #1 which is at 125 with oil, 115
> before, and #4 at 135. I'm thinking its time for an overhaul on mine since
> the case has never been apart since 1962.  Mark Durham
>
> On Mon, Feb 8, 2010 at 2:12 PM, Daniel Monasterio <dmonasterio at hotmail.com
> > wrote:
>
>
>
>
>
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