Sweet.  Try warming up the block if have not done so already with gasoline and switch over to water.  Just an idea.  Keep up the excellent work!
I installed inverter on bike and taken trials with plasma plug and gasoline, It gives good power to bike, battray drained complitly, then used 12v 60Amps  , but before I take trial with water and hot engine, burnened inverter

Also the GEET system was able to use 50% to 70% water with the gas mix but they could not go over that.
lemonade helps to mix gasoline and water, But high corrosion

but  carbon fiber is a  pretty good conductor .
Use teflon rods.

have  you  tried  to break the  ceramic  out of a sparkplug?
Heat spark plug, before doing any machining, it will not crack

Today I am getting 4 Stroke bike engine, for stand alone test.

Use teflon rods....wouldnt that slip out..HAHAHAHA..j/k

What about G10 platics? Seems that might work. here is a quote...

"G10-FR4 / *MICARTA?/ GAROLITE:

SHEETS, TUBES, and RODS plus Machining - Fabricating capabilities.                       

G10 FR4 laminate grades are produced by inserting continuous glass woven fabric impregnated with an epoxy resin binder while forming the sheet under high pressure. This material is used extensively in the electronics industry because its water absorption is extremely minimal and the G10 line of materials is not electrically conductive. The G10 FR4 is most commonly used in PCB (Printed Circuit Boards) applications.  G10 exhibits superior mechanical and dimensional stability and doesn't shrink. Temperature ratings of 180 degrees C.(not enought?) In addition to these properties, G10/FR4 has excellent dielectric loss properties, and great electrical strength. The difference between Grades G10 and FR4 is that FR4 is a fire retardant grade of G10.  FR4 (also known as Garolite) can be substituted where G10 is specified; G10 can never be substituted for FR4.   G10 is also known as Micarta and Garolite and can be used for structural supports, buss bars, mechanical insulation, gears, test fixtures, washers, spacers and tight tolerance machined parts for electromechanical assemblies."

Quote from: capacitor70 on June 21, 2008, 11:18:49 PM

but  carbon fiber is a  pretty good conductor .
Use teflon rods.

If I remember  right  teflon  can take around 900 degrees ..... that  is probably  high enough
The problems with teflon is  it is  slick  and  fairly  soft .......    in short  it  is "squishy' under  presure ......... with  repeated    temprature  changes    the   core of the plug  would  eventually pop  out .......possably  at great speed

Quote
Today I am getting 4 Stroke bike engine, for stand alone test.

good  luck   with  your engine

gary

Quote from: xbox hacker on June 21, 2008, 11:28:54 PM
Use teflon rods....wouldnt that slip out..HAHAHAHA..j/k

What about G10 platics? Seems that might work. here is a quote...

"G10-FR4 / *MICARTA?/ GAROLITE:

SHEETS, TUBES, and RODS plus Machining - Fabricating capabilities.                       

G10 FR4 laminate grades are produced by inserting continuous glass woven fabric impregnated with an epoxy resin binder while forming the sheet under high pressure. This material is used extensively in the electronics industry because its water absorption is extremely minimal and the G10 line of materials is not electrically conductive. The G10 FR4 is most commonly used in PCB (Printed Circuit Boards) applications.  G10 exhibits superior mechanical and dimensional stability and doesn't shrink. Temperature ratings of 180 degrees C.(not enought?) In addition to these properties, G10/FR4 has excellent dielectric loss properties, and great electrical strength. The difference between Grades G10 and FR4 is that FR4 is a fire retardant grade of G10.  FR4 (also known as Garolite) can be substituted where G10 is specified; G10 can never be substituted for FR4.   G10 is also known as Micarta and Garolite and can be used for structural supports, buss bars, mechanical insulation, gears, test fixtures, washers, spacers and tight tolerance machined parts for electromechanical assemblies."

This  might  work good

I think I would  trust  ceramic  more though .......if the details  of  how to  get  it done can be worked out

gary

try mcmaster-carr for ceramics

www.mcmaster.com

catalog page 3531 at the bottom

also search the site for ceramic tubes