Sparkplug Differences???
09-30-2007, 10:46 AM
#1
On the Bandwagon
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Thread Starter
Sparkplug Differences???
Going to change my sparkplugs in an effort to pass emissions.
On the label under the hood there are 2 Bosche plugs listed: WR7DC and WR7DP. What's the difference between the DC and the DP?
Thanks!
On the label under the hood there are 2 Bosche plugs listed: WR7DC and WR7DP. What's the difference between the DC and the DP?
Thanks!
09-30-2007, 10:50 AM
#2
Rennlist Member
DC is a std. carbon steel center electrode, DP is platinum: the plug I've had best results with in both 16V and 32v cars is the DS version - Bosch silver electrode ....
09-30-2007, 11:46 AM
#4
Rennlist Member
Ken..........a recent observation when I checked my spark plugs (Bosch quad 4) were that they were not tight. They were not loose but required re-torque to get them to spec.
Perhaps the washer requires a 2nd tightening when they're new..........either way, 20 ft lbs they're all set to now.
Perhaps the washer requires a 2nd tightening when they're new..........either way, 20 ft lbs they're all set to now.
10-01-2007, 01:01 AM
#5
Administrator - "Tyson"
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Supercharged = Copper Plugs = WR7DC
Some of us are running WR6DC plugs (one range cooler).
Some of us are running WR6DC plugs (one range cooler).