Arthur Wood wrote:
All we need to find vacuum leaks in a complex engine is a smoke machine
that works. All it needs to do is...
a. Emit lots of smoke that won't clog up an engine when it condenses, and,
b. Constantly push that smoke at a couple of psi for about a half hour.

We made a smoke machine to work on a friend's kid's old bimmer but the
smoke machine we made failed to generate enough smoke. And now I need a
smoke machine.
https://www.turboimagehost.com/p/368...moke2.jpg.html

It seems so simple, and yes, we've seen the "cigar in a can" and "burning
rags in a can" videos but they all have problems of not generating enough
smoke for a long enough period of time.

Our machine generates smoke for a long time but not enough smoke!
https://www.turboimagehost.com/p/368...moke7.jpg.html

It's 3 holes in a new paint can with glycerin in a soup can inside.
https://www.turboimagehost.com/p/368...moke3.jpg.html

The top has a 12VDC diesel glow plug which gets red hot. It is stuck into
the glycerin in a soup can. That generates the smoke.
https://www.turboimagehost.com/p/368...moke5.jpg.html

We push that smoke out regulated at about 3 psi with an air gun mounted on
the side.
https://www.turboimagehost.com/p/368...moke8.jpg.html

There's just not enough smoke.
https://www.turboimagehost.com/p/368...moke9.jpg.html

Do you know what fluid would generate more non-sticky smoke?
Or do you know of a hundred dollar smoke machine that can do the two thing?
a. Emit lots of smoke that won't clog up an engine when it condenses, and,
b. Constantly push that smoke at a couple of psi for about a half hour.


First lose the glow plug, more smoke = more surface area for the oil to
cook on.
I built a paint can unit as a demo, generates a LOT of smoke, more than
my Snap-On unit does.

Used nichrome wire wrapped around fiberglass tiki wicks. Wound a total
of 4 coils. Two are in series and then those are in parallel with the
other 2, gives you a LOT of surface area and uses under 12 amps of 12
volt current.

Next a common propane regulator. You do not want high PSI in the system,
REAL easy to damage parts that cannot handle pressure. The propane
regulator can take 90-200 psi and drop it to under 1/2 psi (11-12 inches
of water column, OEM smoke machine standard is no higher than 13 in/wc)

Made an air bar that puts the air out in a nice even ring.

Made a low pressure check valve on the output, that way you can shut
down the machine with it attached and it won't pull fuel vapor back in.

And a flow meter and adjustable flow so you can tell what is actually
going on.

Basically a home built version of a red line unit.

--
Steve W.