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Author Topic: spark plug question  (Read 36911 times)

Benz Dr.

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  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: spark plug question
« Reply #50 on: July 27, 2007, 06:43:10 »
I've been telling everyone for years that I only use W9DC. The book calls for W7DC but I find they're a bit too cold. The R in the plug code is for resistor and you really don't need to use this type of plug because the plug wire has a resistor built into it. This tends to cut the voltage back too much and you want as much as you can get reaching the spark plug.

Dan Caron's
 SL Barn
benzbarn@ebtech.net
 slbarn.mbz.org
  1 877 661 6061
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1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

Rolf

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Re: spark plug question
« Reply #51 on: July 27, 2007, 06:56:01 »
I listened to you Dr. I use W9DC and found the plugs burn cleaner.

Rolf
1966 230SL Auto
1992 300D
1991 FLHS
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