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Old 08-09-2003, 12:29 AM   #1 (permalink)
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what does advancing your timing do?

what does advancing your timing do for performance. how is this affected by compression?
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Old 08-09-2003, 03:56 AM   #2 (permalink)
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what does advancing your timing do?

IMOE on a stock vehicle you gain lowend torque when you advance the timing and you tend to lose a little topend. The opposite is generally true as well, when you retard the timing it will increase the topend and lose lowend torque. This is not set in stone or true in all cases but it has been my experience.
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Old 08-09-2003, 09:11 AM   #3 (permalink)
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what does advancing your timing do?

A higher compression engine will tolerate less timing than a low compression engine, also the timing curve ( speed of advance ) will be a contributing factor as to how much you can get away with
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Old 08-09-2003, 04:39 PM   #4 (permalink)
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what does advancing your timing do?

when you advance the ignition timing, you start the pressure rise in the cylinder sooner, as a result the cylider pressure peaks sooner forcing the piston down earlier. as a side benefit you get more complete combustion, which means better fuel economy and power. as was stated though you need to watch the pressure rise to prevent detonation. retarding the timing only helps top end power when the engine is force fed fuel and air. unless you were thinking of cam timing, in which case 1 bad 88 gt is right one. there are some engines where advancing cam timing helps power through out the rpm range.
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Old 08-10-2003, 02:19 PM   #5 (permalink)
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what does advancing your timing do?

Quote:
On 2003-08-09 02:56, 1 Bad 88 GT wrote:
IMOE on a stock vehicle you gain lowend torque when you advance the timing and you tend to lose a little topend. The opposite is generally true as well, when you retard the timing it will increase the topend and lose lowend torque. This is not set in stone or true in all cases but it has been my experience.
That's probably because the maximum advance is (close to) right on, while in the knock sensitive range between idle and about 3500 rpm, the advance curve is set conservative, to avoid problems with knock.
Advancing the entire curve brings the low rpm timing closer to optimum (assuming that knock is not a problem), while the maximum advance may be a bit too much.
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