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Senior Advisor
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Bosch 3.0 curve chart
Anyone know where I can find a gen-u-wine Bosch distributor curve chart for the 3.0L engine? Have a good idea what it should be but someone wants the real deal. any year will work.
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08 Cayenne Turbo |
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12-13-2009, 02:57 PM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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James,
You'll find that in the Porsche factory shop manuals. They are different for US & ROW as well by year.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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12-13-2009, 03:27 PM
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Thanks steve. I'll pass that on.
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08 Cayenne Turbo |
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12-13-2009, 03:54 PM
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Quantum Mechanic
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I have the factory shop manuals and found the distributor curves in section 9. See below.
I scanned the distributor advance curves for the 80 and 81 SC. The factory procedure for setting the timing is the same. -5 BTDC at 950 RPM with both vacuum lines connected. Given today's gas, I back this off to -3 BTDC. As you can see, the high rpm slope in the advance curve is at about 3000 rpm SHAFT SPEED which is 6000 engine RPM (Distributor turns at 1/2 engine speed).  
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Mark Petry Bainbridge Island, WA 81 SC Last edited by mpetry; 12-13-2009 at 06:29 PM.. |
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12-13-2009, 04:30 PM
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Sally
Babe
