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914World.com _ 914World Garage _ How to set initial timing for new engine

Posted by: Cevan May 10 2010, 10:47 AM

I am about to fire up my engine for the first time after rebuilding it. I'm using an L-Jet distributor with no vacuum advance or retard. I'm using carbs.

I'm trying to determine where I should set the dizzy. From what I could gather off the internet, the total mechanical advance for this dizzy at 3600 rpms is 21-25 degrees (I'll average it to 23 degrees).

I think 28 degrees total advance is what is recommended as a starting point so am I correct in setting the static timing to 5 degrees BTDC?

Posted by: SLITS May 10 2010, 10:53 AM

That'll work.

Posted by: McMark May 10 2010, 10:57 AM

Funny how these things come in pairs... http://www.914world.com/bbs2/index.php?showtopic=106634.

5 BTDC should be fine. There is also a little line in the distributor edge that shows you where the rotor should point.

Posted by: Cevan May 10 2010, 11:07 AM

While I did my deck height measurements, I had installed the fan shroud and marked my fan at exact TDC. My fan is from an L-Jet car and only had a mark at 7.5 BTDC. So I will go with 5 degrees BTDC. Wish me luck!