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Timing on 71 1800E B-20E Engine 1800 1971

posted by  Outlaw on  Wed Oct 2 09:59 CST 2002
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Only getting around 18 mpg; runs good, but suspect it could be better with tune-up and some tweaking. What is best way to set timing -- by feel and sound? The specs are designed for 97 octane fuel, which is non-existent, so needs to accommodate 93 octane. Any suggestions appreciated.
Outlaw








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    Timing on 71 1800E B-20E Engine 1800 1971

    uid 4846's pic
    posted by  JohnMc on  Wed Oct 2 10:31 CST 2002
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    last visit: Thu Oct 23 07:42 CST 2014
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    The '97' octane fuel they sold back then is pretty much the same octane as what they sell now as 93 octane premium. (Minus the lead of course). Back then they tested the gas at the refinery and advertised that number. But the octane declines as the gas ages, and by the time you put it in your car it is lower. Eventually they changed the standard on the displayed advertising to be the average of the refinery test and the pump test.

    Timing won;'t have much of an effect on fuel consumption, basically (given a sound engine) advance it in small increments until you detect the faintest pinging, then retard it a touch from there.

    Inspect the plugs to see if they look sooty. When the D-Jet FI gets out of whack it often runs rich. This allows the car to run pretty normally, but shoots the fuel consumption quite high.







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