The gear swap can go either way. It can get you up to speed faster but it can also run you out of power faster.
Need Ideas on How To Make My Olds Faster
- Thread starter MegaOlds
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I would start the ignition timing at 12* btdc at idle with the vacuum advance disconnected and vacuum line plugged. Set initial advance then re connect the vacuum line. In my experience only a radical cam is going to need over 16* initial advance. Like I said I would start with 12* initial...
You guys can't suggest base timing setting without knowing how much mechanical advance is built into the distributor. 12 degrees base timing ain't gonna cut it if the distributor has only 14 degrees built into it. On the other hand 20 base is way too much if you have say 24 mechanical. If the distributor is recurved, it should run very well with 20 initial.
I have seen both curves in Olds HEI distributors but most have lower mechanical advance amounts. The motor will plain run better with more intial. I also found a couple of extra degrees over 36 total run stronger on the street. I bet he could add a couple more degrees. Low compression Olds engines tolerate much more timing than the sbc.
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