| Author | Message | ||
| David Jones (Dave)
|
Hi Scott, I have to agree with Steve on this one... I have used both the Bosch, and NGK, as well as others... and for my money the NGK's have performed better over time then all the others I have tried in my 77 308... By the way, I went through the same thing with the Bosch plugs.... I thought my car was coal powered..  | ||
| Steve Magnusson (91tr)
|
Scott -- the Bosch "7" translates to an NGK "6" which is already 1 or 2 heat ranges hotter than the stock 308 plug so I think you should focus on mixture rather than trying to step on the heat range more. See: http://www.clubplug.net/cross.html for the translation. (Although I still think the NGK BPR6EVX exposed center electrode design is vastly superior to the "buried" Bosch center electrode design.) | ||
| Craig Dewey (Craigfl)
|
They MAY be too cold for your present driving style and setup but you would first need to be sure that the setup is correct -- timing & fuel. I say "driving style" because if you aren't giving it an "Italian tuneup" now and then (7,500 + RPM), you may not be seeing the plug deposits as they should be-- golden tan. If you choose a hotter plug and change either your driving style or your setup, you could do damage to your engine - preignition. I would say you should check the plugs after a good run before you decide. If you're still seeing carbon, check the setup first... | ||
| Scott Gold (Scotttgold)
|
About a month ago I changed my plugs to Bosch Platinum WR7DP. My car has been missing lately so I pulled the plugs to check the condition of them. They were all carbon fouled bad! A real nice even coat of black soot on them all. So is my heat range to low? Do I need a hotter plug to burn off these deposits or could it be something else? All carbon'd up, Scott |