[TR] TR6 Advance Conversion

Jeff Scarbrough fishplate at gmail.com
Tue Mar 1 12:25:56 MST 2016

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?

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


for the governing physics, and do a proper calculation.  Have fun!

Jeff Scarbrough
Corrosion Acres, Ga.

On Tue, Mar 1, 2016 at 2:15 PM, anabil007 <anabil007 at comcast.net> wrote:

> Preparing to install vacuum advance conversion on the TR6.
> 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 ???
> BTW had a hell of a time getting the old roll pin out, very, very stubborn.
> "Life is too short to drive boring cars"
> Bill Pugh
> 1957 TR3 "Casper"👻
> TS16765L
> Wallace, CA
> anabil007 at comcast.net🐔
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