[quote=dodgycanuck]It is plenty rich under boost! I had imagined, too rich... my a/f meter is not installed yet.
Thinking on it a bit... with all the plugs looking pretty much the same, perhaps the gas? I tend to use the same fuel as much as possible. Also, I know the rings are weak. I guess I will be able to investigate a bit further once the head is off. [/quote
Make sure it doesn't lean out too much in cruise or part throttle. Unless it's a dedicated drag car, you're spending a lot more time at part throttle and in cruise mode than under acceleration. If it leans out too much at part throttle a valve can burn because it isn't getting cooled by fuel enrichment.
Last edited by Blackwater; 07/30/17 07:07 PM.
