<VV> CHT Re: valve seats and "Ping"
FrankCB at aol.com
FrankCB at aol.com
Sat May 19 14:46:53 EDT 2012
1. I guess I'll have to explain it in simpler terms. Once the needle on
the CHT gauge begins going above the normal (for those Corvairs) 350, you
begin watching it closely while driving the car. When you have driven a
distance far enough that the needle exceeds 450 and keeps moving higher, you
pull over, shut off the engine and raise the engine compartment lid so the
engine can cool off. Once it has cooled sufficiently, you restart and
resume the rest of your driving.
2. In one of my situations, the engine needed a rebuilt/new carburetor.
In the other, it needed a new harmonic balancer. Do you carry those items
with you?? I don't.
3. I'll have to agree with you on this one.<GGGG>
4. You could have installed a larger water tank, but I'm glad to learn
that you acknowledge that the water injection DID work. If you want to keep
your air-cooled Corvair engine in a strictly stock condition, then by all
means don't use water injection. But that would also keep you from adding
intercoolers as well. And some intercoolers actually use WATER cooling to
remove heat from the intercooler
5. I've used water injection on NON-boosted engines where an intercooler
would have been useless. Intercoolers are used by auto makers because
they are virtually idiot proof. And if "everybody" is using intercoolers,
then why are there a number of companies making and selling water injection
systems????
6. Those of us that try to extract additional power from out air-cooled
engines are willing to try whatever works. Just ask Tom K.
Frank "stock Corvair is a good beginning" Burkhard
In a message dated 5/17/2012 8:06:10 P.M. Eastern Daylight Time,
jvhroberts at aol.com writes:
1. A CHT gauge won't tell you how far to drive.
2. I carry spare belts and tools, and don't worry about this.
3. We don't drive fighter aircraft.
4. I had water injection. To be effective, I filled the tank twice for
every fill up. Obviously, it worked but was the view worth the climb? And what
the hell was I doing adding water for cooling to an AIR COOLED ENGINE???
5. Everyone is smart enough to use intercoolers NOW. And that's been the
case for a very long time.
So, what was your point again?
John Roberts
-----Original Message-----
From: FrankCB <FrankCB at aol.com>
To: jvhroberts <jvhroberts at aol.com>; patiomatt <patiomatt at aol.com>;
virtualvairs <virtualvairs at corvair.org>
Sent: Thu, May 17, 2012 4:40 pm
Subject: Re: <VV> CHT Re: valve seats and "Ping"
John,
Of course I didn't NEED the CHT gauge to tell me there was a
problem!! But I did NEED the gauge to tell me how far I could drive before I had
to cool off the engine by shutting down and lifting the engine compartment
lid. How far would YOU have driven a Corvair one time on 3 cylinders and
another time with NO functioning fan???? The CHT "told" me how far I could
drive each time before I had to pull over and cool off so the engine was
not damaged.
Since the average driver will simply not bother to add water to a
water injection system, the mfrs. all use intercoolers which are virtually
idiot proof. Oldsmobile found that out the hard way when they installed water
injection briefly on their turbocharged Jetfire engines in 1962-63. It's
hard enough for the average driver to remember to add engine OIL when
needed. I remember seeing a woman at a gas station once with NO oil showing on
her dipstick and the attendant had to add 3 quarts of oil to replenish the
level. And yes, he DID push the stick down all the way into the tubing.
If water injection was good enough for 20,000 of our fighter planes
during WW 2, it's good enough for me.
But maybe "they" weren't "smart enough" then to use intercoolers????
Frank Burkhard
Boonton, NJ
More information about the VirtualVairs
mailing list