Just an FYI - Degree wheels -
03-21-2010, 05:39 PM
#17
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Wait, what?
03-21-2010, 05:52 PM
#18
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I am retarding the cams around 1.5 degrees from a perceived installed lobe center-line of 120.5.
03-22-2010, 01:46 PM
#19
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Porsche sets the S3 intake centerline at 120.5° ATDC and S3 exhaust centerline at 107.5° BTDC. The cams are retarded 6.5° with the factory settings.
For split overlap (zero advance/retard) the centerlines should be advanced 6.5° to 114°. [120.5-6.5=114, 107.5+6.5=114]
So I was wondering if your software is recommending 3° retard from split overlap or from the Porsche setting.
For split overlap (zero advance/retard) the centerlines should be advanced 6.5° to 114°. [120.5-6.5=114, 107.5+6.5=114]
So I was wondering if your software is recommending 3° retard from split overlap or from the Porsche setting.
03-22-2010, 04:15 PM
#20
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The factory procedure for valve timing provides a slightly different setting between the right and left sets of cams. Presumably for thermal expansion or belt stretch. What allowance, if any, will you be making?
