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Just finished talking with the people at Magnicore.
Here's the Skinny, as I interpret it, your mileage may very.
The difference between the 8.5 mm and the 10 mm is only in the amount of
insulation around the core. The cores are the same. They recommend the 10s for
installations with high heat. There is a little more dielectric (insulation
capacity) but they don't seem to think that that capacity is significant.
The 10s are less flexible and about 40% more in cost.
Their estimate, for the rotary (4 wires) Length approx 20" each (of course
you need to give them exact specs from top of the igniter to top of the plug as
well as angle of the connectors that you want) is approximately $100.00 for 8.5
and $140 for 10mm. Delivery is only a couple of days. (fitted connectors are
part of the deal.
Both the 8.5 and the 10 are available in any color you want, as long as it
is RED.
Since the routing of the wires is relatively straight line and I will be
making my own harness holders, I am tempted to do the 10s, however I think that
the 8.5s would be OK also.
Badly quoted, from memory, a poem by ee cummings
"Some think that the world will end in fire, some think it will end in ice,
from what i have tasted of desire i hold with those who favor fire but if i had
to perish twice i also think that ice is nice and would suffice"
Choices choices.
Rich
In a message dated 1/13/2013 7:08:50 P.M. Central Standard Time,
bbradburry@bellsouth.net writes:
But good to
know. Thanks!
Bill
B
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Rob
Sent: Sunday, January 13, 2013 7:30
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re:
Hiccup
Something else to consider
is that inductive core wires are kind of delecate inside and that
forcing them into a wire loom that is not made for them can damage the
delicate coil of wire inside. All these detail are
anoying.
----- Original Message -----
Sent: Sunday,
January 13, 2013 5:30 PM
Subject:
[FlyRotary] Re: Hiccup
Kelly,
I was lucky enough
to mount the coils just the right distance from the plugs and I am now using
the stock RX-8 wires, so if they fit the RX-8, they will fit my
installation.
Thanks, Ed. I
was going to go with the 8.5 if no one came up with a reason for the thicker
ones. The stock wires are 7mm, and it is pretty hard to get them into
the wire loom, so I will probably need to get a larger loom for either
one. I will try it first.
Bill
B
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Kelly Troyer
Sent: Sunday, January 13, 2013 3:34
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re:
Hiccup
Bill,
One more consideration..............The
Magnacore wires for the Stock RX8 Renesis may not
be
the proper length for your
installation...........Probably you will need a custom set made if you
have
not already figured that out
!!.............<:)
Kelly
Troyer
On Sun, Jan 13, 2013 at 1:06 PM, Ed Anderson <eanderson@carolina.rr.com>
wrote:
Bill, I have the 8.5mm wires -
seems like there was a reason (other than price, but too long ago to
remember - perhaps I could only get different color boots on the
8.5)
Sent:
Sunday, January 13, 2013 12:47 PM
Subject:
[FlyRotary] Re:
Hiccup
Ed and
John,
Do you guys have
the 8.5 or the 10 MM thickness? Does it
matter?
Bill
B
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Sunday, January 13, 2013 7:14
AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re:
Hiccup
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.
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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