Re: advice on 1952 performance

Posted by HH56 On 2017/9/8 16:13:25
19 is pretty good but I always take mine from the intake manifold which would be the tube that is on the OUT port of the vacuum pump. The vacuum advance could be coming from a slightly different place and may not quite follow the intake manifold reading. There has been some discussion on the forum that the carb advance port location is closed off or reduced under certain throttle conditions. The intake manifold will provide a true reading all the time.

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