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Bill,
What ever you use for new ignition wires, check
their continuity before you install them. I got a new set of MSD's inductive
core wires (expensive) that had a bad wire right out of the box.
Robert
----- Original Message -----
Sent: Saturday, January 12, 2013 6:31
PM
Subject: [FlyRotary] Re: Hiccup
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
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