Re: [FWDLK] 331 hemi timing questions

[John McCann <jmccann@xxxxxxxxxxxxxx>]

   That doesn't work because there are several degrees of crankshaft travel 
when the piston is at the top of  it's travel with no visible movement of 
the piston, the method David described is very accurate and the method we 
used to find TDC in Radial airplane engines using a degree wheel and an 
indicator in the spark plug hole.

John

----- Original Message ----- 
From: "Ray Jones" <hurst300@xxxxxxxxxxxx>
To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Sunday, July 06, 2008 9:25 AM
Subject: Re: [FWDLK] 331 hemi timing questions


> Hi Chuck;
> The easiest and most positive way to check for TDC is to remove the #1 
> spark plug, and insert a straw in the plug hole. Place a socket and 
> breaker bar on the crank pulley nut. Slowly turn the engine over in the 
> proper direction of rotation, Checking the rotor to make sure its moving 
> towards #1, and watch the straw. When it stops moving up and starts moving 
> down you just went past TDC. Back up and slowly rotate until the straw 
> just stops. Now look for your balancer mark and see where it is. Any mark 
> ahead of this location is advanced and any mark behind it is retarded. 
> Look real hard as some paint may have filled in the mark.
> You will then know if the mark is for TDC, 10°, or if the Balancer outer 
> ring has migrated some.
>
> Let us know, Ray in Mena
>
>
>
> On Jul 5, 2008, at 8:01 PM, Charles Deyoe Jr. wrote:
>
> I just installed the new pretronix ignitor on my 55 new yorker with the 
> 331 hemi.   I adjusted the timing but have a question that I can not find 
> the answer too.
>
> I adjusted the timing as per the service book at 6 Deg BTDC and on the 
> harmonic balancer there is a line painted on it from the rebuilder about 
> two years ago and a dot on each side I am guessing is 10 deg before and 
> after .
>
> My question is when I shine the timing light to time the car the timing is 
> between the line and the lower dot on the balancer{ as close to 6 as I can 
> get}  is this location before or after TDC ?  as the car runs and I just 
> test drove it 45 miles { went for a ice cream run }  and the only think I 
> found is when I I went to start the car it was very slow to even turn over 
> at first.  I have found this happens if I do not change the battery every 
> three years and the new battery I ordered came in a little small and I 
> told them I need the larger size to fit properly.
>
> Should I readjust the timing to read above the line when I look down with 
> the timing light ?  and I also noticed when i was adjusting it today that 
> when I gave the car a little gas the timing went past the lower dot and 
> returned to about 6 deg when I let off as I know this what should happen
>
> I have not tried any other test so If any one has advise let me know. 
> thanks again.
>
> Chuck Deyoe
> 1955 new yorker
>
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