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| The Pub For General Automotive Related Talk |
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18-01-2005, 01:04 PM
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,541
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Guys I just wanted to know ..that if you have good air fuel ratios,can you get more power by adjusting ingnition timing?
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18-01-2005, 01:14 PM
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FF.Com.Au Hardcore
Join Date: Dec 2004
Location: Pakenham, Victoria
Posts: 6,983
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Not really as adjusting the timing affects where it sparks. You may not end up with the correct mixtures @ the time it fires which may end up being lean or rich. You have to have to add more fuel or take away fuel when required.
It does work in small amounts but not in large amounts. Brenden
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74 XB Fairmont (street car) 11.07@123.02mph. 08 LV Ford Focus XR5 (daily). Tuned by Hallam Performance |
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18-01-2005, 01:15 PM
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RIP...
Join Date: Dec 2004
Posts: 15,524
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It depends whether the timing is close to ideal or not. If the engine is modified, then altering ignition timing will usually improve things.
Rick.
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. Oval Everywhere... Last edited by Sox; 18-01-2005 at 01:16 PM. Reason: Finish off sentence....... |
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18-01-2005, 05:05 PM
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,541
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If my timing is retarded by 8 -10 degrees than it should is it losing power?
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18-01-2005, 05:21 PM
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RIP...
Join Date: Dec 2004
Posts: 15,524
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If it's 10deg retarded from it's ideal spot, yes.
Rick.
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. Oval Everywhere... |
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18-01-2005, 07:13 PM
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#6 | ||
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,541
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There are a few sensors which take 6 -10 degrees out of the ignition timing on the AU
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18-01-2005, 07:24 PM
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Last warning
Join Date: Dec 2004
Location: Mornington Peninsula, Victoria HeadCount: 3
Posts: 11,194
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the knock sensor?
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FALCN6 - Turbo, Air Bag Suspension - Hibernating EL GT - Supercharged NASCAR - 83 Thunderbird , Bagged DAILY - BA Fairlane Ghia, Boss 260 Turbo OFFROADER - Ford Explorer 
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18-01-2005, 07:39 PM
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Generally missunderstood
Join Date: Jan 2005
Location: Lara Victoria
Posts: 131
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Quote:
Spark and air/fuel ratios are a bit of a balancing act, particulary in engines that are "on the edge". If your engine is detonation limited, ie if your power is still increasing as you advance the spark and you get detonation before you reach MBT. Then richening the air/fuel ratios gives you some detonation relief and you can then advance the spark closer to MBT and get more power, however like most things there is a limit and making it too rich will lose you more power than you gain by from the spark advance. I hope this makes sense. jzab Last edited by jzab; 18-01-2005 at 07:40 PM. Reason: fixed a typo |
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Fuel Ratios vs Ignition..
Linear Mode
