4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

spark advance and cams

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Old 08-10-2006, 04:02 AM
  #1  
jkm1987
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Default spark advance and cams

after i installed my cams i got a a/f down the road tune on my diablosport i checked and noticed they didnt touch the spark advance which i set at 6 in the low end and 6.5 in the top end i was at the track a couple weeks ago and i took a pass with spart at 9 i got a bad launch but had great trap 105 or 106mph if i remember correct but the car shook really bad so i took it back down to 6 the next day a damn plug came out of the head for some reason im wondering what people are running w/cams or if it even makes a difference
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Old 08-10-2006, 04:26 AM
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97targa
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Default RE: spark advance and cams

Just remember what cam you are running...XE-262? Those style cams have atleast a 4* advance in timing on the lobes. So when you add another 6 or 6.5 your really running 10-10.5 advanced. That's just too much. Back it down. When your engine gets hot on the higher rpm's you don't want to run it lean by creating more advance like I think you are doing. Be careful with that stuff. Good luck.
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Old 08-10-2006, 04:27 AM
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03sonicgt
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Default RE: spark advance and cams

I'm pretty sure the stockers will work fine. Pull your plugs out and see if they're dirty. If so your running a little rich. And I believe if the'yre white your lean, I forget which color they turn. I don't see why advancing your timing with the cams would mess up your car. If you use 93 octane, you could bump it up to 14 degrees.
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Old 08-10-2006, 10:15 AM
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GodAmGT00
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Default RE: spark advance and cams

IF... you get no Knock... Remember, it's not so much the maximum amount of degrees of Timing advance you can run.. It's the A/F Ratio that determines how much of a Spark advance you can throw at it... Always start out conservative, and then bring it on...



JT
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