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berenlotr
Joined: 23 Oct 2006
Posts: 71
Location: Western MA
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 Posted: Wed Mar 14, 2007 4:27 am Post subject: timing clarification |
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| hey guys this may be a stupid question but there are alot of posts on this subject and i just wanted a definitive answer, i am running a 79 924 na and i am going to set the timing, so u set the marks on th oil pump, cam shaft and flywheel to tdc and the use the timing light on the flywheel marks, what i don't understand is when u talk about -3 setting on the timing light, i have looked at a couple and they all have advance and it goes from 0 to 60 or so degrees, so how do u set it to -3 which would correspond to like 5 BTDC with the vaccum hose attached, like i said this might be stupid question, i am kind of a newb when it comes to correctly setting the timing on a car. thanks guys |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Wed Mar 14, 2007 4:31 am Post subject: |
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The dial on an advance timing light shows the number of degrees before the mark you are looking at. They haven't yet invented one that can predict the future...
So if you are hitting the Z mark, and the dial is on 10, it is 10BTDC.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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berenlotr
Joined: 23 Oct 2006
Posts: 71
Location: Western MA
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| Posted: Wed Mar 14, 2007 5:10 am Post subject: |
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| so u can't set the timing after TDC with a timing light, or just not with an advance tming light? |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Wed Mar 14, 2007 5:14 am Post subject: |
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| berenlotr wrote: | | so u can't set the timing after TDC with a timing light, or just not with an advance tming light? |
Cars requiring ATDC settings will have the appropriate markings on the flywheel or crank pulley. If the mark isn't there, you can make a mark yourself, with something like this:
In fact, you could even print out this very pic in the size you need. . .
_________________
Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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berenlotr
Joined: 23 Oct 2006
Posts: 71
Location: Western MA
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| Posted: Wed Mar 14, 2007 9:14 am Post subject: |
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| k thx for the help, slightly less confused now |
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