Plug Conversion

Automotive Spark Plug and High Performance Wires Conversion Kit

NEW, UPDATED AND REDESIGNED KIT. CLICK HERE FOR A COPY OF THE NEW INSTALLATION INSTRUCTIONS.

WORKS ON ALL M14 POWERED AIRCRAFT AND ON CJ6 HUOSAI ENGINE AS WELL.

The new kit price is $399 plus $24 shipping, insurance to a U.S. address. A $12 handling fee is charged for all on-line credit card payments. Contact me for shipping rates outside the U.S.

The kit includes everything you need to complete the conversion, including the spark plugs of course. The spark plugs are over-the-counter Champion or NGK automotive spark plugs. Typical cost for each plug is about $2.25.

The wires are 8 mm Taylor Spiro Wound racing wires custom manufactured for me by Taylor Cable Products. With regards to RFI, the Taylor Spiro Wound wires are designed to eliminate RFI. I have experienced no noise whatsoever in my personal Yak 52. Here's how the Spiro Pro wires eliminate RFI as explained by a Taylor engineer. "Electronic filtering is possible due to two types of components. They are capacitors and inductors. Capacitors like high frequency, and will allow it to pass, while they hate low frequency, and will reject it. Inductors like low frequency, and will allow it to pass, while they hate high frequency, and will reject it. The Spiro Pro wires are constructed in such a way that they have a certain ratio of capacitance, and inductance. This causes the wires to be a high impedance to high frequency, (which is RFI). They will allow the D.C. component of the firing signal to pass through while blocking the A.C. component, (the part that causes RFI). The composition of the core, the thickness of the core, the size of the conductor, the permeability of the core, the number of turns per inch, etc., all have a direct relationship on the suppression factor of the wire."

The following bullets are taken directly from the Taylor web site.

- Spiro-Pro wires provide more fire power to the spark plugs than OEM resistor core wires and up
to 10 times less resistance than standard resistor core wires

- Spiro-Pro eliminates radio frequency interference (RFI) and is a must when using a multi-spark
discharge ignition system, electronic ignitions, and on board computer systems

- Spiro-Pro’s two layers of 100% pure silicone makes it the highest temperature rated wire on the market
(600º F) without the need for additional sleeving

- Features Taylor Cable’s EXCLUSIVE low profile, 100% silicone PRO BOOT^®with grips and vibration proof
double spring locking spark plug terminals

The wires are cut precisely to length for each and every cylinder for both mags. Since 8mm wires are slightly larger than the holes in the mag cap, the kit is supplied with a 5/16" drill bit which is used to drill the magneto distributor cap holes to the proper size. Since the magneto distributor cap material is relatively soft, drilling the cap is quite easy. The front plug wires are marked "1" through "9" and each front spark plug wire has a red band on it to signify the front plug wires. The rear spark plug wire set does not have a red band on each wire and each wire is also marked "1" through "9".

The kit includes a sufficient number of tie wraps to dress out the wires and to hold the hose pieces of rubber hose in place through the baffling. The instructions are precise and include color photos of the installation which are now provided in the kit on a CD.

To facilitate the installation into the magneto through the front cover, one must grind out a small amount of metal inside the hole of the front cover of the mag. The 8 mm wires (vs. 5 mm standard Russian wire) won't quite go through the cover otherwise. It's very easy to do with a Dremel tool or something similar. The material that is removed inside the hole of the front cover is excess metal and has no impact whatsoever on the strength and rigidity of the front cover. The wires fit though this hole very snugly.

Removing the Russian wiring harness takes time. There are 4 metal tabs on the ring that bolts to the case. The 11 mm nuts holding the ring tabs are removed with a 1/4 drive 11 mm socket and extension. The ring splits in half at the top and the large braided shield that goes from the ring to the mag cover is also completely eliminated. Once the Russian wiring harness is removed, the reassembly is quite nice. You'll be amazed how much more room you have without the Russian wiring harness in place.

You have the choice of reusing the metal clamps that hold the original, braided spark plug wires or tie wrapping the wires to the intake tube using the supplied rubber hose. Either way works. Since the intake tubes are "cool" compared to the exhaust temperature, there is no problem with heat concerning the wires when they are affixed to the intake tube using the rubber hose and tie wrap.

After installation, on my first attempt to start the engine, I BARELY touched the start button and she fired up instantly. The best it EVER has. I couldn't believe it! The idle is really smooth. Which I attribute to a hotter spark. The mag drop is 2% or less. Again, better than it ever has been. It accelerates better and just feels like it has more power. The guys I fly with tell me I do get off the ground quicker than they do, given similar gross weight etc.

I hope this answers most of your questions. In my mind, it's the best conversion for this engine and the cost is about the same as the cost of one set of Russian spark plugs, if you can find them. If you're interested in a kit, send a check made out to me for the $423.00 (which includes the shipping and insurance to US locations) at my address below and I will ship a kit directly to you. Be sure to include your ship-to address. If you have additional questions, feel free to email me or call me at 334-285-2141.

A. Dennis Savarese
215 Crossgate Dr.
Elmore, AL 36025
dsavarese0812@bellsouth.net