Am I One Tooth Off?
Thread Starter
Team Owner
Joined: Aug 1999
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From: Ontario
Am I One Tooth Off?
Look carefully at this picture. Before winter storage I set the timing at 8 degrees BTDC at about 600rpm. That is with a static timing light. I was looking for 10 degrees but the vacuum advance unit ran up against the manifold. Am I one tooth off with the distributor?
Thread Starter
Team Owner
Joined: Aug 1999
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From: Ontario
Re: Am I One Tooth Off? (paul67)
On the Lars suggestion, I have his C2 kit. I may have made a mistake when I put that aluminum intake on last summer. Lars' instructions are pretty detailed and plain reading. I will follow them when I see the car in the spring. Sorry to bother you fellows....
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Re: Am I One Tooth Off? (paul67)
Do we have a new one-liner for the list?
"Paul? His distributor is one tooth off!" :D
Looks off a tooth to me, too if that's only 8 deg.
"Paul? His distributor is one tooth off!" :D
Looks off a tooth to me, too if that's only 8 deg.
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Thread Starter
Team Owner
Joined: Aug 1999
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From: Ontario
Re: Am I One Tooth Off? (ddecart)
Dave,
Yes I just ran out of adjustment room as the can hit the manifold. I just picked up an advance timing light so I will get things done properly in the spring with the Lars kit.
As to teeth, I may be a few short of a full set;).
Yes I just ran out of adjustment room as the can hit the manifold. I just picked up an advance timing light so I will get things done properly in the spring with the Lars kit.
As to teeth, I may be a few short of a full set;).
Racer
Joined: Dec 1999
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From: Berea, KY, USA
Re: Am I One Tooth Off? (paul67)
Paul,
Actually the distributor looks to be 1/2 tooth off to me. This is caused by the gear (cam gear) being in the wrong position on the distributor shaft. The cam gear has a dot on it...the dot should be in the same position as the tang on the rotor button. The gear can only be put on the shaft in two positions. If it is opposite of what is correct the distributor can not be put in exactly the correct position. Check this when you pull the distributor.
Dave 62 :seeya
Actually the distributor looks to be 1/2 tooth off to me. This is caused by the gear (cam gear) being in the wrong position on the distributor shaft. The cam gear has a dot on it...the dot should be in the same position as the tang on the rotor button. The gear can only be put on the shaft in two positions. If it is opposite of what is correct the distributor can not be put in exactly the correct position. Check this when you pull the distributor.
Dave 62 :seeya
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Team Owner
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From: Ontario
Re: Am I One Tooth Off? (Dave62)
Thanks Dave. I will certainly check that. I pulled this pic off the internet. It shows the vacuum can in what I believe is a correct position.
I learned the dot trick when I rebuilt a 1979 distributor last year. Why I did not check that when the work was being done on the 1967 last summer is beyond me. Sometimes I marvel at my stupidity.
[Modified by paul67, 10:18 AM 12/27/2003]
I learned the dot trick when I rebuilt a 1979 distributor last year. Why I did not check that when the work was being done on the 1967 last summer is beyond me. Sometimes I marvel at my stupidity.
[Modified by paul67, 10:18 AM 12/27/2003]
Melting Slicks
Joined: Jun 2002
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From: Orrtanna Pa.
Re: Am I One Tooth Off? (paul67)
Definately off a tooth or two.Mine sets in the block with the front two towers on the cap parallel to the carb mounting bolts.I run 15 degrees in the distributer,but can easily pull it down to 8 if I want.Just line up the zero mark on the balancer and then pull the distributer cap to see where the rotor is pointing now.Then pull the distributer out and as it leaves the cam gear,note how much it turned from the fully inserted position.Take a long flat screw driver and turn the oilpump drive shaft to the desired final position,and set the distributer back in with the additional advance(The difference between the rotor position fully engaged with the cam gear vs. the position the rotor was in when the gear left the cam .It may take a try or two,but you should have no trouble correcting this.
By all means do not rewire the cap to compensate,as someday down the line,Bubba will set the timing or change the plugs and have a heck of a time getting it to run.
By all means do not rewire the cap to compensate,as someday down the line,Bubba will set the timing or change the plugs and have a heck of a time getting it to run.
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Team Owner
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From: Ontario
Re: Am I One Tooth Off? (The Money Pit)
I think between Lars' paper and your advice I have this sorted out. Keep in mind my car is in storage so this is a spring project. Thanks to all for the comments.
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Re: Am I One Tooth Off? (paul67)
Hay Paul, There's a really good article in 'Corvette Enthusiast' Magazine, August 2003, page 68 by John Hinkley that deals directly with the same exact problem seems they couldn't get the timing set without the body of the distributor hitting the manifold, which is when they found out the gear on the bottom was on 180 degrees out. The car will run perfect, but you have to twist the distrubutor way around to get the timing set at the right spot. He says it's a very simple mistake to make when doing distributor work.
