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RE: You need vacuum advance.
By Steve Boulay - 10/01/2001 1:34:03 PM; IP 193.243.161.102
Royce,
Thanks for the quick reply, and I agree with what you've said. The distributor I have has a Pertronix ignitor and an adjustable vaccuum advance canister, but have it disconnected because it makes the pinging worse. I've always run between 34-38 degrees total before(on other engines), but can't seem to get this one sorted out. I'm not sure exactly what the compression ratio is, and I'd like to give up on the lead additive. Is there a "better" brand of pump gas I should be using? Also, my original question related to the 'rate' that the centrifugal advance comes in and the rpm that total happens at. Do you think that slowing that down with heavier springs and putting more/less into the advance weights will affect the "pinging" appreciably? Also, I'm using ported vaccuum to run the advance canister(when it's connected),..... will full manifold vacuum afford much of a difference in this area? Any additional thoughts will be appreciated.
SGB
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Collapse <a href=../ForumFE/reply.aspx?ID=8383&Reply=8383><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor8383" onclick="return false;">'67 Shelby 428 "pings" under load...need help</a>&nbsp;-- <font color=#0000ff>Steve Boulay, <i>10/01/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=8383', contentMargin: 60, icon: $('anchor8383') }); </script>  '67 Shelby 428 "pings" under load...need help -- Steve Boulay, 10/01/2001
 RE: '67 Shelby 428 "pings" under load...need help -- Morgan, 10/01/2001
Collapse <a href=../ForumFE/reply.aspx?ID=8387&Reply=8383><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor8387" onclick="return false;">You need vacuum advance.</a>&nbsp;-- <font color=#0000ff>Royce Peterson, <i>10/01/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=8387', contentMargin: 60, icon: $('anchor8387') }); </script>  You need vacuum advance. -- Royce Peterson, 10/01/2001
RE: You need vacuum advance. -- Steve Boulay, 10/01/2001
Collapse <a href=../ForumFE/reply.aspx?ID=8389&Reply=8383><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor8389" onclick="return false;">RE: You need vacuum advance.</a>&nbsp;-- <font color=#0000ff>Steve Boulay, <i>10/01/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=8389', contentMargin: 60, icon: $('anchor8389') }); </script>  RE: You need vacuum advance. -- Steve Boulay, 10/01/2001
 RE: You need vacuum advance. -- Royce Peterson, 10/01/2001
 RE: You need vacuum advance. -- Royce Peterson, 10/01/2001
 RE: '67 Shelby 428 "pings" under load...need help -- Mel Clark, 10/02/2001
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