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Re: [T3] Engine noise

<x-flowed>>> > Detonation. Try backing your timing off about 2-3 degrees.

OK. I did that. It is now timed at 0 degrees, which is actually by the book
for a 69. The timing light shows 29 degrees of maximum advance with the
vacuum hose disconnected. Before it was timed at 31 degrees.

Okay, I didn't know that you were trying to run more advanced timing than suggested.

It's not really a question of "trying to run a more advanced timing than suggested". At first I timed it to 7.5 degrees BTDC, because that is where I was led to believe that it should be timed.

After that I noticed in one of the books that a '69 is supposed to be timed to 0 degrees. When I tried this, however, it seemed very flat and wanted to stall all the time, so I readvanced it. At that time I bought an advance timing light, and was told (I don't remember whether it was here or on the Type 34 list) that as long as total advance is under 32 degrees, I should be OK, so I timed it to 31 degrees total advance. This worked out about 3 degrees BTDC static. It ran much cooler and seemed much happier. That is how it was timed until this morning, when I retarded it further. This time it seems to go OK, but I had to raise the idle speed. I don't know what I did wrong the first time I tried this, or what I did right this time.

There is a further reason that I was not sure about the correct timing. I don't have a stock distributor. Mine is a "T", which was meant for the 69 MT. The 69 AT dual carbs apparently had an "S" distributor. I don't know anything about it other than that, but that could be part of my problem.


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