MikeM wrote in message ...

The interconnect is removed per the STC that comes with a
conversion kit purchased from Univair. NonSTC conversions using
Piper's original PA20 drawings remove the interconnect because
the PA20 didn't have one; it was an "innovation" when Piper
came out with a PA22.


I had also emailed my question to an A&P friend that owned a PA22/20
and his answer (relating to the STC) was "it depends". Here's his
response :

"It depends on the original horse power. If you had a 135 hp the
spring stays in place. If you had an original 135 hp, converted it to
150 hp, the spring stays. If you had an original 150 or 160hp and
converted it, you remove the spring. That's just the way the STC was
written.
Also if you go to 180 hp add a constant speed the spring stays or is
added."

John Galban=====N4BQ (PA28-180)