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911 OCD
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CO and timing advance settings
I have an 83 SC USA motor with ROW CIS intake. Car is primarily used for DE. What is optimal CO and timing advance settings for best HP? Everything is stock except for GHL headers and muffler. Thanks in advance.
John Kelly
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jk 82 SC Euro 82 SC Targa 69 912 62 AH 3000 97 740il 'If you are under control, you're going too slow' Parnelli Jones |
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04-07-2007, 05:38 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Hi John:
CIS offers VERY limited abilities to alter CO beyond idle, but I'd shoot for 2.5% CO using headers and low restriction mufflers. Without question, you should check your AFR's on a chassis dyno to make sure you are not too lean above 5000 at WOT. Assuming that you are using 93 octane pump gas, stick with stock advance numbers so you do not inadvertently buy new P/C's,... 
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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04-07-2007, 01:04 PM
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911 OCD
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Settings
Thanks loads Steve.
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jk 82 SC Euro 82 SC Targa 69 912 62 AH 3000 97 740il 'If you are under control, you're going too slow' Parnelli Jones |
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04-07-2007, 01:26 PM
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911 OCD
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Stupid Question, I know....What is WOT?
Thanks again
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jk 82 SC Euro 82 SC Targa 69 912 62 AH 3000 97 740il 'If you are under control, you're going too slow' Parnelli Jones |
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04-07-2007, 01:29 PM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Quote:
Wide Open Throttle
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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04-07-2007, 01:56 PM
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911 OCD
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I may be a little lean as the car has been running on the hotter side at DE events. So this info is very good to know. I'll also keep my 3 mm allen as a mainstay track tool.
Have a good holiday jk
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jk 82 SC Euro 82 SC Targa 69 912 62 AH 3000 97 740il 'If you are under control, you're going too slow' Parnelli Jones |
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04-07-2007, 02:58 PM
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