REFLECTOR: Exhaust systems

[John Dibble]

Don't know.  That's a good point.  I'll check the next time I fly.  Is
your question for both mag and EI, or each separately?  Compared to
both, the EGT is higher with either the mag or the EI (highest with EI)
and the CHT is about 20 degrees lower with either one.

John

Scott Derrick wrote:

> Are you LOP or ROP?
>
> Scott
>
> John Dibble wrote:
> > At 2300 rpm/22" map, my EGT is 30 degrees higher on EI compared to the mag.  I'm
> > thinking that the EI timing needs to be advanced.  However the current EI "settings"
> > are already 4-5 degrees advanced beyond the 28 degrees specified for the Franklin
> > engine.  If I adjust the EI "settings" to 28 degrees, it's much rougher and backfires
> > on EI during run-up.  Any thoughts about using EGT/CHT to fine tune the timing?
> >
> > John
> >