setting ignition curves without dyno

[Chris Conlon]

Bruce wrote:

> On the subject of dynos, and timing, I, used to do this full time, and
> the dyno steady state stuff was always too advanced.  Also that was
> almost 30 years ago.  While todays stuff is much better, I'd still verify
> it was right by testing any of it when the engine was actually installed.
>
> I have never seen anything better for figuring out 60' times then
> actually doing 60' runs..

I guess what you're saying is, more or less don't bother, since
I'd have to test it on the street anyway. Well, I guess I can
accept that. It'd be nice to know how it works in theory anyway,
even if that info is not useful in practice.

> >How about watching EGT closely?
>
> EGT peaks at Stoic.  EGT show you how close you are to the thermal
> limits of you engine.  You can have a 1550dF EGT, and be three states

But how do timing changes effect EGT, if you keep all else
constant? It'd never work if things are changing all over
the place, but what if you were only changing the timing?

   Chris C.