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03-20-2004, 06:06 PM | #1 |
Registered Member
Join Date: Oct 2001
Location: Goldendale, WA, USA
Posts: 84
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Timing Question
1986GT w/the mods listed below.
I recently found out that I've been trying to set my timing wrong. I was mistaking the TFI harness for the spout connector. Obviously, it didn't work right. With my car idling at 750-800rpm and the spout connector plugged in, I get a reading of 14*btc. Holding it at about 2500rpm it goes up to approx 20* (it's hard to get an accurate reading working the throttle and timing light at the same time). With the car idling and the spout connector disconnected, I get a reading of 0-2*btc. I've read that the timing should be set with the spout connector unplugged, if that's the case the timing's way off. If I set the timing up to 14*btc, is that going to put the timing at 25*+ at an idle with the connector plugged in? Thanks, Jeremiah BTW--The car seems to run fine, it'll pull up to 5k, and gets decent fuel mileage (19-20 combination of city/hwy.)
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Jeremiah 1986 Mustang GT K&N Filter, Removed Air Silencer, Black Magic Fan, 65mm Explorer TB, 110lph BBK Fuel Pump, F/M Force II Cat -Back, O/R h-pipe, U/D's Timing@14* 1986 Mustang LX SSP--new project car AOD, 3.27's, Dumps, 238k miles |
03-21-2004, 03:28 PM | #2 |
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Join Date: Oct 2001
Location: Goldendale, WA, USA
Posts: 84
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After searching for awhile, I answered my own question.
I set the base timing at 14* and the car seems to have a lot more low end grunt, and overall power. The car doesn't ping, so I could probably bump it up to 16*, but I'm going to play it safe and leave it at 14* for now. 3.27s coming next week!
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Jeremiah 1986 Mustang GT K&N Filter, Removed Air Silencer, Black Magic Fan, 65mm Explorer TB, 110lph BBK Fuel Pump, F/M Force II Cat -Back, O/R h-pipe, U/D's Timing@14* 1986 Mustang LX SSP--new project car AOD, 3.27's, Dumps, 238k miles |
03-22-2004, 09:34 AM | #3 |
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Join Date: Feb 2002
Location: Jacksonville, FL
Posts: 706
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14* BTDC
"An initial spark setting of 14* with an OE EEC-IV processor produces apporximately 38* of total ignition advance.
Engines backed by an AOD transmission typically prefer less initial spark timing than manual transmission 5-liters." page 275, Mustang 5.0 Technical Reference and Performance Handbook, Al Kirschenbaum.
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1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy |
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