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Marv D · 08-12-2012, 11:48 AM

You throw any sort of 'ahol' in the mix (be it Methanol or Ethanol) and plug reading becomes a total black art in my book. In fact I might as well be drinking that ethanol!! I ran a car on VP's M3 methanol for a 'SHORT' time,, no wideband to assist just trying to figure out the plugs. But I was so far off on the tune I had one dead hole and didn't even know it. I'm not sure the standards and tried and true plug reading we know from gasoline apply. Hopefully Vin will pop in with some real expertise,,, bu ti the mean time... My opinion is,,,, trust your wideband. If it doesn't start boiling the cement in the plug and blistering the porcelain,,, I'm not sure I'd worry about it. I had a hard time BUILDING heat in the motor so is the e48 going to be cooling the chamber so much that you need a hot plug to keep the fires lit???
Just my first thought and probably not even worth the 2¢ of fuel it took to type it,, I'd take some 'cruise' timing out of it and see if power suffers, and I bet it will move the heat mark back closer to the bend. We both know it would in a WOT and race fuel hard pull. But what it does on the street........ with a blend of ethanol... Man like I said. I'd trust the wideband and be drinking the ethanol to calm my scattered thoughts. LOL

08-12-2012, 11:48 AM	#4
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: Too hot of a plug?? You throw any sort of 'ahol' in the mix (be it Methanol or Ethanol) and plug reading becomes a total black art in my book. In fact I might as well be drinking that ethanol!! I ran a car on VP's M3 methanol for a 'SHORT' time,, no wideband to assist just trying to figure out the plugs. But I was so far off on the tune I had one dead hole and didn't even know it. I'm not sure the standards and tried and true plug reading we know from gasoline apply. Hopefully Vin will pop in with some real expertise,,, bu ti the mean time... My opinion is,,,, trust your wideband. If it doesn't start boiling the cement in the plug and blistering the porcelain,,, I'm not sure I'd worry about it. I had a hard time BUILDING heat in the motor so is the e48 going to be cooling the chamber so much that you need a hot plug to keep the fires lit??? Just my first thought and probably not even worth the 2¢ of fuel it took to type it,, I'd take some 'cruise' timing out of it and see if power suffers, and I bet it will move the heat mark back closer to the bend. We both know it would in a WOT and race fuel hard pull. But what it does on the street........ with a blend of ethanol... Man like I said. I'd trust the wideband and be drinking the ethanol to calm my scattered thoughts. LOL __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.