10-04-2018, 09:21 PM
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#1 |
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Member
Join Date: May 2013
Location: Edmonton, Alberta
Posts: 96
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Model A timing
I have my 1931 Vicky on the road but the timing still seems a bit off. I have to run it with the spark fully advanced and even then it backfires a bit and don't run really smooth. I have re timed it several time but can not seem to get it just right. Any suggestions?
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10-04-2018, 09:59 PM
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#2 |
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Senior Member
Join Date: May 2010
Location: Bismarck ND
Posts: 1,189
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Re: Model A timing
Maybe your cam gear is off by a cog. Try advancing the distributor a bit by adjusting the distributor cam in the opposite direction of rotation a few degrees to see if this helps. Let us know how that works.
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10-04-2018, 10:32 PM
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#3 |
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Senior Member
Join Date: Apr 2016
Location: Bellingham, WA
Posts: 1,163
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Re: Model A timing
It should run better than you state...even it is not "just right".
Put the timing pin in the depression in the timing gear. Fully retard the spark lever, then loosen the screw on the distributor cam and place the rotor where it is in this picture...  Tighten the screw and put it back together. This should be close enough for the car to run much better. Now, figure out what went wrong when you timed it and give it another try.
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All steel from pedal to wheel |
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10-04-2018, 11:18 PM
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#4 | |
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Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,840
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Re: Model A timing
Quote:
Also when does it "backfire"? My car would backfire on deceleration if i had the GAV set to lean. Had nothing to do with my timing. Just a thought. Last edited by Y-Blockhead; 10-05-2018 at 06:57 PM. Reason: Correct spellin' |
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10-05-2018, 09:43 AM
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#5 |
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Senior Member
Join Date: Dec 2014
Location: Shawnee, Ok
Posts: 3,471
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Re: Model A timing
Are your spark rods adjusted to provide the correct travel in the distributor housing? Both ways, retard and advanced. Easy to check and easy to adjust.
Had mine out of whack once.
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Keith Shawnee OK '31 SW 160-B |
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10-05-2018, 03:49 PM
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#6 | |
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Senior Member
Join Date: May 2010
Posts: 702
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Re: Model A timing
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Quote:
Position it where the actual rotor is or where the dotted outline is? |
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10-05-2018, 03:55 PM
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#7 | |
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Senior Member
Join Date: May 2010
Location: Young Harris, GA
Posts: 1,815
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Re: Model A timing
Quote:
When timing the engine, you want the rotor tab to be where it is in the photo, not the dotted line. The dotted line shows the position of the rotor when the plug fires and the spark lever is fully advanced. .
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Jim Cannon Former MAFCA Technical Director  "Have a Model A day!" |
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10-05-2018, 03:55 PM
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#8 |
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Senior Member
Join Date: Apr 2011
Location: Endeavor, WI
Posts: 119
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Re: Model A timing
Where it actually is.
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"I have not yet begun to defile myself." -Doc Holliday '31 Tudor, '69 F100, '66 Mustang, '11 Ford Flex |
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10-05-2018, 07:48 PM
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#9 |
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Senior Member
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,907
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Re: Model A timing
Check the flexible wire under the plate for frayed wires or loose connections.
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Dave / Lincoln Nebraska |
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