|
I've been using iridium plugs in my Renesis for 300
hrs. I am using the iridium plugs that come from the factory. When I
changed them at 250 hrs I did not notice any change in performance! I use
regular car gas with ethanol and very seldom do I use 100 LL.
I had a hiccup every so often and could not
eliminate it until I put damper chambers in my manifold lines. I used
the small plastic fuel filters for lawnmowers (Purolator F21124). This
eliminated at least 95 % of the hiccup and my manifold pressure is very
steady. With the dampers my manifold pressure varies about 0.1
in hg up or down in cruise. Without the damper it would
vary as much as 0.3 to 0.4 in hg in cruise. I
plugged the inlet of the filter with JB and drilled a hole about 0.032 inch in
diameter through the epoxy. Check your manifold pressure and see if it is
stable.
Dennis H.
----- Original Message -----
Sent: Tuesday, September 04, 2012 1:29
AM
Subject: [FlyRotary] Re: Intermittent
hiccup
Yup, I suspect SAG. I go through plugs very
quickly.. like 25hrs. No cleaning will help as the electrode is
worn out. You can milk them to 100 hrs but its not really worth
it. SAG gets really bad by 75 hrs. The platinum onea last an extra
hour or two. Have not tried the iridium. Always change plugs
before a long trip. Also, they come out much easier after only 25 or so
hours.
--
David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
On Mon, Sep 3, 2012 at 8:46 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Has anyone ever
noticed a hiccup associated with sparkplug SAG? I have a hiccup that
is occurring at random intervals from seconds to several minutes.
Sometimes it is pretty mild and sometimes it shakes the plane! I also
seem to be down in power and I am beginning to suspect plug SAG. I
have 38 hours with the Iridium plugs plus a lot of time over the years of
running the engine before flight. I had a couple instances of flooding
which required that I take the plugs out and sandblast them to get them to
fire. Just drying them out didn’t
work.
Thoughts??
Bill
B
|