<div dir="auto"><div>Awesome Charley. No factory manual is going to adequately prescribe the right answer for your FrankenMGB. You must love engine building as much as do I.</div><div dir="auto"><br></div><div dir="auto">R<br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Wed, Apr 24, 2019, 8:41 AM Charley Robinson <<a href="mailto:Charley38@twc.com">Charley38@twc.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">That comment, "Just advance the timing until you notice preignition." <br>
has to be taken in the context of how much advance can you dial in <br>
before it starts to ping under load. It's a rough attempt to dial in a <br>
particular engine/fuel combination. I think most of us know the trial <br>
and error method.<br>
<br>
To answer your question: My B engine is set at ~12* advance @ 850 - 900 <br>
RPM with the vac disconnected. It pulls well through the midrange set <br>
that way. But my engine kind of "parts is parts." It's a 18V block with <br>
GH innards (flat -top pistons). All this topped by a pre-smog head and <br>
HS-4 carbs. So I had to tweak it to get it to run the way I like it on <br>
mid-grade gas.<br>
<br>
CR<br>
</blockquote></div></div></div>