|
|
Tracy,
Last upgrade was 7 Nov 07. for both the
EC-2 and EM-2. I am not certain what was done or when the CAS terminator would
have been done???
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy
Sent: Sunday, March 06, 2011 8:39
AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Miss
above staging point.
Hi Bill,
When you just need a quick check of differential on EGTs, glance at the EGT bar
graphs on the main page of EM2. If the bars are close to the same height
you know they're OK. Each of the segments on the bars represents about 20
degrees F. One or 2 segments is not a problem, if there is a rotor
differential problem bad enough to cause a miss due to mixture or ignition, it
will be well over 100 degrees in difference, i.e. it will be
obvious. Remember which bar was the low one and that will tell you
which rotor to start looking at.
One other thought: Since you are running the Renesis, did you
have the EC2 upgraded with the Renesis CAS terminator? Don't know if you
were following the thread when that was being discussed a couple of years
ago. The EC2 was originally designed for the 2nd gen CAS and the Renesis
was different enough to need a change. High speed miss or hard starting
were the symptoms.
Tracy
On Sun, Mar 6, 2011 at 8:14 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Mark,
The car the engine came from had about 1400 miles on it. I
have run about 40 gallons of gas thru it. I will have to check the coils
for darkening. Also same for plug wires. I am using the stock
Renesis plugs. I might try cleaning them.
On a previous occasion, I flooded the engine and it would not start
till I sand blasted the plugs. After that it started normally.
This problem just happened on the second takeoff. The engine
was running smoothly at all rpms till I made the second takeoff. It started
to miss and pop and the rpm would only go to about 6300. after I got in
the air, I dialed the prop back and the rpm was around 6000 and the engine
smoothed out again and was ok the rest of the flight. Now it is missing
on the ground above the staging point. I have mine set at 16 inches.
I watched the mixture and it seems fine on both sides of the
staging point and also on up in the higher rpms. The only difference is
that the engine starts to miss.erratically. I didn’t notice the EGT as Tracy suggested. I
need to switch to the page that shows the temp of both of them and check that
today.
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
On Behalf Of Mark Steitle
Sent: Saturday, March 05, 2011
9:50 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Miss
above staging point.
Bill,
How do the coils
look (underneath)? Are there dark areas in the potting material where
they have gotten hot? There is a history of coil failures in the RX-8's
after about 30k miles.
How many hours on
the plugs/wires? How do they look?
Mark
On Sat, Mar 5,
2011 at 8:36 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Mark,
I have the stock Renesis coils.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
On Behalf Of Mark Steitle
Sent: Saturday, March 05, 2011
6:19 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Miss
above staging point.
Bill,
Which coils are
you running? I chased an intermittent miss which occurred in the 6000
-7000 range. I upgraded to the LS2 "Yukon" coils and the miss was gone.
Mark S.
On Sat, Mar 5,
2011 at 4:56 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
I have developed a miss above the staging point. The fuel pressure
seems ok, the mixture also seems ok. I am at a loss.
To try and troubleshoot, I am considering getting above the staging
point and disabling the primaries and secondaries to see if I can identify
which is the cause. Since it runs ok below the stage, I assume it is not
the primaries.
I recently changed my fuel filters and installed a large canister
filter. There seems a possibility that I introduced some
contamination that clogged an injector. Other wise it seems it must be
spark related. This just happened one flight ago. The engine was
running fine, till that last takeoff. It was missing and would only get
about 6300 rpm. After take off, I turned the prop back and slowed the
engine down to below that number and it smoothed out and ran fine the res of
the flight. Today while taxiing around, I noticed that the miss was back.
Opinions welcomed.
Bill B
|
|