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DougD
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Joined: October 11, 2011
Posts: 291
Location: Auburn, WA
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 Posted: Sun Jun 10, 2012 12:00 pm Post subject: Timing AK |
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| There are a million topics on timing things but I couldn't find any thing timing advice with an AK engine code... any idea what I would time that combo to with the 009 dist? The marks on the pulley are a dent at TDC and a notch at 5atdc... |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 55651
Location: Long Island, New York, USA
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rsorak
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Joined: March 07, 2005
Posts: 2002
Location: Memphis
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| Posted: Sun Jun 10, 2012 12:03 pm Post subject: |
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For all VW engines the best way to set the timing is at 3000 RPM set it at 28 to 30 BTDC. The timing at idle speed is not important.
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Rick '71 Westfalia & '73 Thing |
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citroen
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Location: louisville ky
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| Posted: Sun Jun 10, 2012 1:01 pm Post subject: |
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| if you want a good starting point your pulley mark is 5 atdc make a mark the distance from the mark to the notch 2 times to the right that will be 10 btdc. and then check it at 3000 rpm 28 to 30 degrees |
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Glenn
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Joined: December 25, 2001
Posts: 55651
Location: Long Island, New York, USA
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| Posted: Sun Jun 10, 2012 1:05 pm Post subject: |
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| citroen wrote: | | if you want a good starting point your pulley mark is 5 atdc make a mark the distance from the mark to the notch 2 times to the right that will be 10 btdc. and then check it at 3000 rpm 28 to 30 degrees |
Not necessary, just set it up at TDC, have someone crank the engine and you twist the distributor till the engine starts. Then use the timing light to set it @ 3500rpm.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
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Wildthings
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Joined: March 13, 2005
Posts: 19913
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| Posted: Sun Jun 10, 2012 6:00 pm Post subject: |
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| citroen wrote: | | if you want a good starting point your pulley mark is 5 atdc make a mark the distance from the mark to the notch 2 times to the right that will be 10 btdc. and then check it at 3000 rpm 28 to 30 degrees |
Assuming you have a stock pulley and are using a light with an advance feature you need to be using the TDC mark and one of the others. If you do not have a light with an advance feature then you need to make a mark at 28° BTDC on the pulley. Time to use that high school geometry you thought was so worthless.  |
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nikita
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Joined: September 16, 2007
Posts: 522
Location: California
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| Posted: Mon Jun 11, 2012 12:17 pm Post subject: |
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Idle timing IS important from an emissions standpoint. That is the reason for vacuum retard and 5 degrees ATDC originally. Since '74 models are exempt in most states its not much of an issue today.
When I advanced my '67 from 7.5 to 10 BTDC the increased CO and especially HC was significant. We have a Dodge that is still subject to biennial testing. I have to retard it by four degrees to get it to pass HC. |
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citroen
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Joined: February 28, 2010
Posts: 810
Location: louisville ky
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| Posted: Mon Jun 11, 2012 2:29 pm Post subject: |
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| Go with what Glenn said Remember 009 no vacuum advance |
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