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Re: Timing advance (4 cyl)
> I recently purchased an '87 4000cs 1.8l and have done the following mods:
> 6 degrees BTC is the original spec. How far should I go? I've heard 12
> degrees BTC....
Find a good test hill, one the car has to pull hard to climb. Advance
the timing until it just barely knocks, then back off a degree or two.
Along the way you may find a "sweet spot" to your taste. I've been up
to over 20 degrees on my 5 cyl coupe, but it didn't run smoothly there
with my new exhaust. Probably at about 15 deg now.