quote:Originally posted by No Quarter:quote:aren't we all running Autolite's 25 ???
I run the MME recommended race plugs. Sounds good, running race plugs. Gotta go for a drive soon! Spring, I'm waiting for you...
You can call any plug a "race plug" if you choose.
What I found on my A3 Ford heads is that the plug recommended by the engine builder, which was a Champion N-8, had a race tip electrode and was ridiculously cold.
1) I am convinced that any "Ford" based engine needs an extended tip electrode. They call them "J" tipped electrodes
This is necessary to get the spark out into the air stream.
2) the Champion N-8, is a racing tip. Doesn't extend into the air stream at all.
3) aluminum heads WITH Weber ida's like a plug that is hotter than what the iron head likes.
I wound up with NGK BP5E. It sure helps with resisting the fouling that you CAN get caused by starting a cold engine with no chokes.
They run beautifully clean BUT I have to admit that during this most recent process of getting the timing and the plug range right I did add the Pantera-Electronics ignition brain.
Jon has got a nice short video on his site that shows the ignition firing a fouled plug (no I didn't give him one of my fouled plugs) and then in a matter of a second or two, the spark has cleaned the fouling off of the plug.
That is on the bench and without the aid of the air flow through the combustion chamber that also aids in cleaning off the plug.
You should visit the website and watch the video. It's like a 10 second video.
After you do, you WILL WANT ONE!
So what I am saying here is I can not scientifically identify my solution as having the right plug or adding the ignition brain because I did it at the same time. Shame on me!
http://pantera-electronics.com...files/FouledPlug.MOV