Re: Excessive fuel consumption

Posted by Ross On 2016/8/8 5:52:11

I would pay particular attention to the timing. Even a few degrees retarded on those engines make the performance drop like a stone. They run quite well with 6,7 or even 8 degrees initial advance. Be sure to set that while idling very slowly and with the vac advance tube disconnected.

It is easy to make a quick check of both advances by observing the timing marks as you rev the engine. Take it up to oh 2500 or so whilst watching the marks. By this time they will have marched quite beyond the pointer. Snap the throttle closed and the marks should immediately jump well back as the vac advance is shut off, then the marks should return more slowly to the initial setting as the revs fall to idle.

A Custom 8 should be a snappy performer. They were not slow cars.