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I agree with, John. I had Magnacore make custom
wires for my rotary - cost me around $45 back then. Have flow for close to
10 years now with the wires with no problem. I also had the
boots in two different colors, one color for leading and one for trailing.
Ed
Sent: Saturday, January 12, 2013 7:31 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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