[s-cars] Spark Plugs - Alternative

D Cosby dccosby at hotmail.com
Tue Sep 13 12:55:55 EDT 2005


I've decided to test out the copper tri-electrode Bosch plugs that Javad 
recommends:

  http://www.034efi.com/product_info.php?cPath=26&products_id=184

If memory serves me right they are F6DTC, which is a temp range hotter than 
stock. This doesn't make sense in my mind, but my old plugs looked a little 
sooty when I removed them (Minhea's chip runs rich) and I was occasionally 
missing under high boost (likely due to the failing, then failed, POS that I 
swapped at the same time). Judging by the look of the old plugs, a range 
hotter could be in order.

Car runs smooth as silk right now right to the top. It may have been the 
plugs, its also likely the new POS. I'll report back if they fail early, but 
so far its a cheap experiment for the price of one stock plug.

I have had problems in the past with the stock plugs failing under less than 
500 miles when I was only running a conserrvative IA chip - including a 
nasty under boost timing pull back that first surfaced through a high speed 
corner on the track... tail wagging anyone?

Dwayne
94 S4: T04e-50 trim @ 1.7 Bar peak, FMIC, water injection, + other 
suspension and brake stuff
Minneapolis, MN




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