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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.

Huw Powell