[A4] A little info....

Jon delta9 at gmail.com
Mon Aug 23 16:12:01 EDT 2004

On Mon, 23 Aug 2004 16:05:46 -0400, Stock, Nicholas
<nicholas_stock at merck.com> wrote:
> The denso's are 'supposed' to be an upgrade in the fact that they last a
> long time, and in fact I'd had about 20,000 miles on them, but when removed,
> showed a lot of wear on the outer electrode. Apart from that, they're pretty
> standard plugs, just with an Iridium tip (very hard). If you're running
> normal boost pressures the choice of spark plugs is probably not that much
> of an issue, but at higher pressures, as the charge becomes less
> conductive(?), a good plug with a proper gap appears to be a must to avoid
> mis-fires.

I have had a GIAC chip in my car since about 8k miles.  I have never
had a problem with mis-fires.  When the X-Chip became available, I had
that installed.  I am fairly certain my boost pressures are ni the
"high" range.  I do not have a boost gauge, though.

However, after my 40K service I did notice a fairly major "peppy-ness"
return to my car with a fresh set of spark plugs.


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