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05-12-2020, 05:35 PM | #1 |
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Join Date: Jun 2017
Location: Loomis, CA
Posts: 46
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Crab distributor initial setup
Im trying to install an electronic crab distributor -speedway 910-8353 in my 39 motor. The engine starts and runs but id like to get some more info on adjustments. Is this thing adjusted by loosening the 3 mounting bolts? Where are they normally set? My motor has no timing marks so without tearing it apart id like to how this thing is set up. Their tech support was very little help. Directions require a timing light which would require marks...
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05-12-2020, 06:13 PM | #2 |
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Join Date: May 2010
Location: Solihull, England.
Posts: 8,775
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Re: Crab distributor initial setup
Use a cable tie to determine a tdc mark. make a pointer. get a dial back or electronic timing light.
Start with this: https://youtu.be/dn446jjCVRg Then watch this: https://youtu.be/XDlNSuW-47Q Mart. |
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05-12-2020, 06:45 PM | #3 |
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Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: Crab distributor initial setup
Yep, need to start with establishing a TDC mark on the pulley and fabricating a pointer.
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05-12-2020, 07:54 PM | #4 |
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Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,534
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Re: Crab distributor initial setup
Yes you loosen the 3 bolts to adjust timing, but without a pointer you are SOL.
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05-12-2020, 07:56 PM | #5 |
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Join Date: May 2010
Location: on the Littlefield
Posts: 6,172
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Re: Crab distributor initial setup
you could get close with a vacuum gauge, advance at idle to maximum vacuum, retard 1 inch of vacuum
has the advance curve been verified to suit your engines needs ---idle timing may be a compromise depending on total advance yes from the picture at speedway the bolts are loosened and assembly is rotated carry spare stock dist for breakdowns |
05-12-2020, 09:27 PM | #6 |
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Join Date: May 2010
Posts: 2,511
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Re: Crab distributor initial setup
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05-13-2020, 05:33 PM | #7 |
Member
Join Date: Jun 2017
Location: Loomis, CA
Posts: 46
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Re: Crab distributor initial setup
Thanks for all the suggestions. Looks like ill be pulling it back apart!
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05-14-2020, 01:20 AM | #8 |
Senior Member
Join Date: May 2010
Location: Sweden
Posts: 427
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Re: Crab distributor initial setup
I drilled a hole in one of the cam cover bolts, and silver soldered in a pointer in the bolt.
Then did the positive stop method, in same way as Mart. |
05-14-2020, 10:02 AM | #9 |
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Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: Crab distributor initial setup
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