<div dir="ltr">Since there won't be significant air flow, the hole just needs to be "big enough".  All that moves is the volume of the displacement in the vacuum chamber -  a couple of ccs?<div><br></div><div>Having said that, a hole that's too small will introduce some lag into the operation - but I would think anything over 3/32" or so would be plenty.  If you're curious, you can start here </div><div><br></div><div><a href="https://www.grc.nasa.gov/www/k-12/airplane/bern.html">https://www.grc.nasa.gov/www/k-12/airplane/bern.html</a></div><div> </div><div>for the governing physics, and do a proper calculation.  Have fun!<br></div><div><br></div><div>Jeff Scarbrough</div><div>Corrosion Acres, Ga.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Mar 1, 2016 at 2:15 PM, anabil007 <span dir="ltr"><<a href="mailto:anabil007@comcast.net" target="_blank">anabil007@comcast.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div>Preparing to install vacuum advance conversion on the TR6.</div><div><br></div>I have checked the vacuum port on the rear Stromberg ,(1970 TR6), and it has no hole.  What size hole? I am assuming the carb has to come off and apart to keep shavings from screwing things up, any ideas ???<div><br></div><div>BTW had a hell of a time getting the old roll pin out, very, very stubborn.</div><div><br></div><div><br></div><div><br><div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word"><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;border-spacing:0px"><div style="word-wrap:break-word"><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;border-spacing:0px"><div style="word-wrap:break-word">"Life is too short to drive boring cars"<br><br>Bill Pugh<br>1957 TR3 "Casper"👻<br>TS16765L<br>Wallace, CA<br><a href="mailto:anabil007@comcast.net" target="_blank">anabil007@comcast.net</a>🐔</div></span></div></span></div>
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