240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

240z Timing

Old 05-15-2013, 08:53 AM
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240z Timing

i have a 1973 2.8L F-54 with a 4th gen E-88 head and electronic distributor from an 80ZX (brand new). this is all rebuilt brand new and i am wondering where my timing should be. i put the light on the balancer and the mark is showing at 17-18 in advance. i have dual SU carbs and they are synced perfect. not lean or rich. car runs great but i wonder about the timing because before the rebuild (orig 2.4L) the timing sweet spot was at about 10 advanced.
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Old 05-15-2013, 10:05 AM
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There's no "set in stone" rule for timing. Each engine, especially a custom built / modified one will need to be adjusted to the driver's liking. As long as it's not pinging (detonating), it should be fine. Running 15-20* BTDC is fine for a "street-modified" L28. Though you will probably need to retard it down to 5-10* for emissions.
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