<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">On 1/21/2018 3:32 PM, barry rosenberg
via Fot wrote:<br>
</div>
<blockquote type="cite"
cite="mid:230065556.2075587.1516573942602@mail.yahoo.com">
<div style="color:#000; background-color:#fff;
font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande,
sans-serif;font-size:13px">
<div id="yui_3_16_0_ym19_1_1516573332087_7159"><span
id="yui_3_16_0_ym19_1_1516573332087_7185">Have yall ever
heard of using the exhaust to evacuate the engine? Not quite
legal in some groups but easy to hide. From your vent can,
use only one, and mount it in the battery box area. Run a
tube up from the floor, thru the battery box and into your
vent can about 3/4 way up inside the can. Under the car,
drill a 1/2" hole in you collector and put a short piece of
tubing at a 45 degree angle in cut at a 45 degree angle. Let
it stick inside the collector about 1/8". Put a short piece
of high temp hose on the pipe then a one way PCV type valve
and connect the other end of this hose to the tube coming
out the vent can. As exhaust passes the tube in the
collector, it will create negative pressure in the engine
slowing up leaks and increasing power. NASCAR engines use a
vacuum pump and gain about 80 horsepower. I used one on a
TR4.</span></div>
</div>
</blockquote>
<br>
The technique described is known as eduction. Gas is pulled into
the passing exhaust stream by creating a partial vacuum at the mouth
of the tube inserted into exhaust pipe. The 45 deg. suggestion is
not hard and fast. I would suggest that an included angle less than
45 deg. is more efficient, but there might be some experimentation
required to get the optimum shape for the pipe mouth. In fact,
Toyota used such an arrangement on their 3AC and 4AC engines to
eliminate the air injection pump. Fresh air was drawn from the air
cleaner housing through a reed valve attached to a flame trap. The
only problem with the arrangement was that the reed valve was a
little noisy at idle. Sanctioning bodies which are chary of the
method might be less inclined to put up a stink if they saw that the
method has been used safely in production cars and if, say, some
junkyard production parts were installed.<br>
<br>
As for pulling the pan in the car, I've done it, and without a hoist
and with the trans in the car (and this was with a TR6 engine
installed, the pan of which is a good inch deeper at the front).
Had to disconnect the mounts, jack up the engine and then wedge the
engine in place. But, I did manage to do a quick re-ring and rod
bearing replacement (and replace a rod with a stretched big end) and
get the pan back on without engine removal, so it can be done. But,
it's not what I'd call fun.<br>
<br>
<br>
Cheers.<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
Michael Porter
Roswell, NM
Never let anyone drive you crazy when you know it's within walking distance....</pre>
</body>
</html>