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Spark Plug Boot Design
FIRST, my data is MOST OFTEN observed, tested, retested, by the use of my CO-2 Spark Plug pressure chamber firing bench.
This allows for ACTUAL running engine test conditions without damage to the engine.
I have NEVER tested a "dual" boot design. (two boots connected at a parting line)
MY reason is the development of the FireCore 50/250 8.5mm spark plug wire showed HV leaks with others 10mm wire.
What was found: When the insulator diameter was increased from 8mm-10mm, a greater chance of a "pin-hole" size hole was present.
ALL who produce the silicon jacket over the wire conductor have the same problem, its just that the 10mm size allows for the pin hole to be more common.
This "pin-hole" allows the HV to leak out into the air with lower energy passed to the end of the wire.
The WITNESSED observation is seen as a Corona on the outside of the wire.
I should add that my tests where with the use of the IGN-1A coil@400psi. of CO-2.
Reason would state ANY tear, pinhole, cut, "dual-boot" design would cause a HV leak.
Lance
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