|
I'd recommend paying the $85. My
magnacore custom made plug leads haven't given me a problem in 8
years.
Any way you can eliminate one possible cause is worth it. One nice
thing about Magnacore is that they will make them to specified
length with pre-installed connectors. I got mine in 2 colors. Red
for leading, Black for trailing.
On 1/12/2013 3:18 PM, Bill Bradburry wrote:
The Magnacore wires
are fairly pricey,
about $85 for the RX-8. Not that I am cheap or
anything, but does anyone have a
more economical source??
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Steven W. Boese
Sent:
Saturday, January 12, 2013
1:30 PM
To: Rotary motors in aircraft
Subject:
[FlyRotary] Re: Hiccup
I had an aftermarket
tachometer on my engine
test stand that would often read twice the actual
rpm. The engine stand
was set up so that the power to each of the four
ignition coils could be
controlled independently. The spark plug wires were
Mazda OEM. The
behavior of the tach would sometimes be affected by
the combination of
ignition coils that were active. In the course of
troubleshooting, it was
found that the tach would consistently read twice the
actual RPM when its
input wire was completely disconnected at the tach.
It was concluded that
the tach was responding to signals emitted by the
spark plug wires and
the doubled rpm indication was due to triggering
by the ignition
signals from both rotors. Replacing the Mazda spark
plug wires
with Magnecore wires from the installation in my plane
cured the tach
errors. Now, however, checking the ignition timing
with an inductive
timing light pickup on these wires was difficult
whereas it was not a
problem with the original wires.
It should be noted
that the EC2 on the
engine stand never gave any indication of having
problems when either set
of spark plug wires was installed in spite of being
physically located closer
to the coils and spark plug wires relative to the
tach.
Steve Boese
RV6A,
1986 13B NA, RD1A, EC2
Dunno how
many people here remember when
spark wire was just that: wire. But it was
electrically noisy. So
it got replaced by carbon impregnated fabric,
which has rather high resistance
(a cheap way to damp the "noise").
Another way to suppress the "noise" is to wrap
the wire (many turns,
closely spaced) around an insulating core, which
creates an inductive
impedance, which accomplishes the same goal but
readily passes spark
current. AFAIK, "MAGNECORE" was the first to
explore this
method, but several companies offer a similar
product now. According to
some sources, the core material can make a large
difference in the inductive
effectiveness. Therefore, I'd recommend
MAGNECORE.
--
Best Regards,
Dale_R (who has no financial interest in Magnecore)
Cozy MKIV #497
On 1/12/2013 7:21 AM, Bill
Bradburry wrote:
Anybody
have a recommendation for ignition
wires for the Renesis? I have the original
Mazda wires. I checked
them out yesterday and they seemed fine, but
I am still considering replacing
them to see if it helps.
Bill B
|