Bosche spark plugs

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defender47
DDK Fanatic
Posts: 91
Joined: Mon Aug 30, 2004 4:32 pm
Location: Somerset

Bosche spark plugs

Post by defender47 »

Can anyone know of any difference between WR 4CC and W 4CC spark plugs for my '89 3.2 Carrera?
Does the 'R' mean anything?
Grateful for help
Cheers
Paul
1959 356A (Now sold)
1970 911 E (sold)
1989 3.2 Carrera
1996 XJS convertible.(Sold)
1977 XJ-S Race Car (Sold)
1985 BMW 635CSi Racecar.
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Lightweight_911
Nurse, I think I need some assistance
Posts: 17999
Joined: Wed Nov 12, 2003 10:48 pm
Location: Worcs/W Mids border

Post by Lightweight_911 »

I think the R refers to a resistor which is built into the plug to reduce interference from being conducted through the ignition leads.
Andy

“Adding power makes you faster on the straights;
- subtracting weight makes you faster everywhere”
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