Would anyone happen to have a picture of the correct distributor installation/ clock position for a 62 300 HP? I attended a local car show yesterday and ran into an owner of such a car that had his distributor installed incorrectly. The vacuum advance unit was just about in contact with the runner of the intake manifold and his tach cable had quite a bend in it. The distributor needs to be rotated CC one position but he would like to hear from the experts before he makes any adjustments. I mentioned that, typically, the point adjustment window would be nearly 90* to crankshaft CL and the vacuum advance nipple typically points at about 45*. The distributor installation view in the AIM's is not accurate so I can't use that. Thanks.
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Re: C1 Distributor Installation Pic
I have a 1962 vette 327 250 hp.....If memory serves me correctly, The first thing you would need to do is bring the #1 piston to top dead center.Disconnect the coil wire.Pull out #1 spark plug and stick your finger in hole. Have someone tap crank the engine until you feel the compression blow on your finger.You must make sure it's the compression and not exhaust. You can tell cause ones more stronger. Then, line up your timing marks by turning the crank. After that, pull off your distributor cap. The rotor should be pointing toward #1 cylinder. If not, then your distributor is not in right and is off a tooth.Then connect the coil wire, replace spark plug start engine and time the engine with timing light.Make sure to disconnect the little vacuum line and plug it prior to timing.After all that is done, you'll see how the distributor sits and where the vacuum advance points.If it's real close to the intake or firewall, then I would guess your distributor is off a tooth or two on your cam gear.There should be ample room on both sides of the vacuum advance unit to set timing.
Hope this might help.........................John -
Re: C1 Distributor Installation Pic
You are correct Michael, there should be about 1/2 inch to 1 inch of clearance between the vac can and the intake runner. A common problem is to have the lower gear on the distributor installed 180 degrees reversed. There is a dimple on the lower portion of the gear, and it needs to be alinged with the tip of the rotor. If backwards, the dist will be 1/2 tooth off from the position it needs to be in to obtain correct timing.Bill Clupper #618Comment
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Re: C1 Distributor Installation Pic
Bill, John,
Thanks for the info. I tried to explain the correct installation to the owner but I know he didn't believe me, and I suppose I can't blame him. He said every time he takes the car to a show, someone is always trying to tell him some part or paint color is incorrect so he just doesn't pay any attention to it. I was hoping to find a good factory or restored car photo to show him but I haven't found one yet. He'll be at the FL meet next week so maybe that will help convince him. Thanks again.Comment
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Re: C1 Distributor Installation Pic
Michael -
This isn't a Corvette, but it's the correct cap orientation and wire indexing.
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Re: C1 Distributor Installation Pic
Thanks John. I forwarded the pic to the owner. His adv unit is only about 1/16' away from the intake manifold runner so it may be off by one entire tooth instead of just a gear/shaft index problem.Comment
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Re: C1 Distributor Installation Pic
One tooth off is 28* of distributor housing mis-orientation, and if the drive gear is incorrectly oriented (dimple vs. rotor tip), that by itself will result in 14* of distributor housing mis-orientation.Comment
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Re: C1 Distributor Installation Pic
It's possible that it's 28* off because it's a LONG way from where it should be but I'll have to see it again to be sure. Wish I would have take A pic of it at the show.Comment
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Re: C1 Distributor Installation Pic
Forgot to mention... I was going to scan and send him the distributor installation drawing in one of the C2 AIM's but when I looked at it, the drawing makes it look like the dist is rotated CC much further than it's supposed to be. I believe the window in the cap would normally be near 90*, or probably 85*, off C/L but the drawing shows it located about 70*. That's probably why the restorer of his car set the dist in that way to begin with.Comment
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