Quote:
Originally Posted by meltedpanda
OK so I searched all the threads here and I may be a bit more confused. I am trying to track down this miss and some have pointed to my plugs so I got to thinking - (not good) 
Sooo, I looked through the posts, I find gap range from .032 - .035
and plugs recomendations for a W9dc0- Bosh, 7911 Bosh or Ngk BP6ES.
But also there is referece to 450's VS 560's , early 70's versus 80's
All I want to know is what do I put in my 72 450SL . |
This was from a previous reply.
The plugs I have on the shelf are Super Bosch WR9DC. Bosch has changed there numbering system since 2004 so the new number is WR90dc. The Kragen/Checker internal number is 7512 if they look it up by make and model the will come up with nothing. So 7512 is the magic number. The R in the name of the plug means it is a resistor plug but it takes 20,000 less volts to properly fire a solid copper core VS a platinum plug. Price is now $3.59 a piece, sure am glad I bought 3 boxes of 10 at 1$ back then.[/QUOTE]
The two plugs that you can run are a NGK BP6ES or BOSCH WR90DC. Never a problem in my 107 and she is a oil addict. I set my plugs at 032 and let physics take it to 035.