81 Timing
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Instructor
Joined: Nov 2002
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From: Grafton WV
81 Timing
Can us 81 Owners with the "computer" set the Curb Idle timing to 36 Degrees with a Adjustable Timing Light . Plus does the Vacuum need to be unplugged when doing this . I have a after market chip in the computer . Just had a Senior moment and can't think of the chip name Hyper Tech or something like that .
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Safety Car
Joined: Jul 2001
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From: York PA
Re: 81 Timing (Yeller81)
Can us 81 Owners with the "computer" set the Curb Idle timing to 36 Degrees with a Adjustable Timing Light . Plus does the Vacuum need to be unplugged when doing this . I have a after market chip in the computer . Just had a Senior moment and can't think of the chip name Hyper Tech or something like that .
:steering:
:steering:
Burning Brakes
Joined: Dec 2000
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From: Des Moines Iowa
Re: 81 Timing (Yeller81)
Quote: "Plus does the Vacuum need to be unplugged when doing this ."
There is NO vacuum line to plug on a stock 1981 distributer set up, as has been said, the computer performs all of the spark advance functions, and all you can adjust is advance at idle.
There is NO vacuum line to plug on a stock 1981 distributer set up, as has been said, the computer performs all of the spark advance functions, and all you can adjust is advance at idle.
Safety Car
Joined: May 2001
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From: Surrey
Re: 81 Timing (Yeller81)
Ken,
As stated above for timing alterations. Make sure you unplug the wires as said (if you unplug the wrong connector the engine won't run) & get the idle down to 600rpm (Auto, not sure for manual, 700rpm???). Then adjust to what feels good. I've got a Hypertech chip fitted & set my base timing to 11BTDC & it made a difference in that pick up is better, it feels more responsive & low end power was boosted. Not sure what the max safe advance is (depends on fuel quality, altitude, CR...) but mine ran well at 12BTDC (I backed it off just to be on the safe side).
:cheers:
As stated above for timing alterations. Make sure you unplug the wires as said (if you unplug the wrong connector the engine won't run) & get the idle down to 600rpm (Auto, not sure for manual, 700rpm???). Then adjust to what feels good. I've got a Hypertech chip fitted & set my base timing to 11BTDC & it made a difference in that pick up is better, it feels more responsive & low end power was boosted. Not sure what the max safe advance is (depends on fuel quality, altitude, CR...) but mine ran well at 12BTDC (I backed it off just to be on the safe side).
:cheers:
