timing

Chris Nelson

Chris Nelson

Senior Member
Can someone tell me the timing for a 50 Ford flathead with an Isky 77B cam and mechanical electronic Mallory ignition?
Thanks; Chris:
 
I would bump it about 2 more degrees. Even a mild cam like this has more overlap, so there will be some charge dilution and so could use a little more advance.
 
You might want to see whats in the distributor before you try it. Initial timing is not very important, just so long as the engine starts. Next run it up to 2000-2400 and check advance curve. Then you can determine what you want or need. With vacuum, I like about 28 degrees. However the mechanical should be limited to around 22. A closed combustion chamber will help here.
 
I do think initial timing is important. But as noted, the advance curve must also be taken in to account for the proper overall timing. With my crab distributor, I run more advance just to help out the part throttle as that is where 90% of my driving is done. Ideally I would like vacuum advance also, but I think the only place I've seen it done is in JWL's book.
 
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