Timing

["Rich Wagner" <drsavage@usa.net>]

Graham:

>Another empirical method I have heard of is to advance the timing as far
>as you can until you just avoid knocking (under provocative conditions).
>What do people think of these empirical methods please, based on
>experience (I don't have the experience to evaluate them with).

This technique does work.  Just remember that you want to avoid detonation
at all costs!  You won't believe what even a little detonation can do to an
engine.  When you use this technique make sure that you do your trials with
the lowest octane fuel you are likely to use.  Also, make sure that it's as
hot as possible outside (assuming that you have no control over the
weather, I guess that means pick a REALLY hot day), and also make sure that
the engine is as hot as it will normally be.  Also, make sure the engine
compartment is as hot as it will normally be.  Then, go drive up some
hills.  Load the engine a bit more than you normall would by keeping the
revs low.  Depress the throttle slowly to the floor, and listen VERY
carefully.  Advance the timing  in one- or two-degree increments, and then
back off about two degrees after you have found the detonation point.  That
will give you a little breathing room.  After you've finished, you'll see a
bit more power, better throttle response, and higher fuel mileage.

Again, be very careful.  The idea is to find the most advanced point where
there is NO detonation.  Oh, and if your ears aren't good (like my
dad's--"What?  I don't hear any knocking."), take someone else along with
you.


Rich
Manitou Springs, CO
'82 GTV6 Balocco