Spark Plugs: Platinum or Iridium for F/I ??
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With COP ignition you can gap alot bigger than .025 for less than crazy cylinder pressures(under 100whp per cylinder). The only downside to smaller gap is not as good of a burn at lower load and rpm(read gasmilage). I would start out at .040 and then go down from there if you start to break up(spark blowout) at higher rpms.
Originally Posted by Jay'Z
What gap is good on the coppers? are those 1 step colder? is .025 safe?
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Originally Posted by QuadCam
NGK LFR6A-11
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Originally Posted by TurboSam
i ended up picking up a set of BKR6ES-11s. i needed something right away, however havent installed them yet. did a parts search and found out the BKR5ES-11s are copper plugs for the VQ30 engine, and just went down a heat range for my use.
"The VQ35DE was designed for even more low end torque. Displacement was increased from 3.0L to 3.5L using a longer 95.5mm bore (the size of your piston) and 81.4mm stroke (how far the piston travels up and down) versus the 93 x 73.3mm bore x stroke in the VQ30DE. <snip> A new long reach spark plug design improves cooling performance by increasing the water jacket around the plugs, which strengthen knock resistance and allowed the ignition timing to be advanced.
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Originally Posted by pmohr@Altered
IIRC, the VQ35 plugs actually have a longer reach than the VQ30s; your BKRs may not reach down into the combustion chamber as far as the correct VQ35 plugs.
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Originally Posted by Jay'Z
What gap is good on the coppers? are those 1 step colder? is .025 safe?
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