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Variable ignition advance? 140-160 1974

posted by  someone claiming to be brian e on  Sun May 9 16:36 CST 2004 [RELATED]

The b20f with the Ktronic injection system does not use a vacuum advance /retard system.
If your distributor has one it is not the correct one for that engine.
The correct unit is a Bosch Jf the advance curves for that unit are :- Advance begins at 400 distributor rpm
3degrees at 610 dist rpm
7degrees at 950 dist rpm
10 degrees at 1400 dist rpm
advance finishes at 2250 dist rpm.
advance total is 12 degrees






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