Wednesday, January 03, 2007 - 02:16 pm, by: Toan Nguyen(Soarer_gt)
Just use copper and change them twice as often. With a TT you're gonna burn through spark plugs every 15-20,000 km anyway. The cost to gain ratio for iridiums is pretty bad when you think about it.
Do you want to spend $70 on iridiums where your car will feel awesome for 5000 km and then start slowing down at the 10-15000 km mark or spend $10 on coppers and change them every 15,000 km for the new feeling again.
That said I run a heat range of 7, but heat range 6 should be fine for you.
Wednesday, January 03, 2007 - 02:57 pm, by: Braden Murdoch(Ribfeast)
I use NGK Platinum plugs, gapped to 0.7mm. BPC something or other I think the part# was. Runs fine, I pull them out for a clean every few months. Never had to replace my spark plugs since.
Monday, April 16, 2007 - 07:01 am, by: Matthew Sharpe(Madmatt)
Hmm, silver is the best conductor, but I'd it'll tarnish almost straight away in the hot wet conditions of combustion, and then it would be useless. I guess as long as you don't mind pulling them out and cleaning them constantly they would probably be great.
Monday, April 16, 2007 - 11:27 am, by: Matthew Sharpe(Madmatt)
Dave Hart wrote on Monday, April 16, 2007 - 11:05 am:
The tarnish on silver is just as conductive
Depends on the oxide formed I think, but its more the way the tarnish would affect the arc formed. Some oxides of silver are very resistant to arcing, and an arc is want you want in a spark plug.
Sunday, September 23, 2007 - 08:46 am, by: Mike Thomas(Petcanizzle)
for a stock 1JZ soarer what am i looking? the NGK iridium iX BKR6EIX? and i dont know what the cold ratings are 6 or 7 etc.. can someone explain or point me to a website since google seems to turn up sweet nothing and the NGK website doesnt have an explanatory section