LeroyJones Posted March 15, 2013 Report Share Posted March 15, 2013 Did a WOT run. Didn't have enough room to get to 6th gear or 10K. I believe I was in 5th at 8K when I cut the engine. I'm running NGK BR9ES plugs maybe too cold. This is on an RZ350 engine. The ground clip is concerning to me. It look like its losing mill scale? Flecks of metal on ground body? I think the ring on porcelain looks ok buy not great. It's rich (dark black) on one side and lighter on the other side. Just throwing this out there. Looks like more than one thing going on with the plugs. Quote Link to comment Share on other sites More sharing options...
sheerider1026 Posted March 16, 2013 Report Share Posted March 16, 2013 Maybe a little deto going on? Whats your compression, timing and fuel used? Quote Link to comment Share on other sites More sharing options...
LeroyJones Posted March 16, 2013 Author Report Share Posted March 16, 2013 This is an RZ350 so the stock compression at sea level is 120psi not 130psi that the banshees are. It has some port work and I live at 2500ft above sea level. That said it's getting 100psi, which is a bit low, but it runs and kicks over fine. I run 40:1 premix and premium gas (91 octane). Timing is stock. I'll post a pic of a WOT run with 270 mains that did. Quote Link to comment Share on other sites More sharing options...
sheerider1026 Posted March 16, 2013 Report Share Posted March 16, 2013 Looks like you have octane requirements covered by a long shot.. That is melted aluminum spatter on the base of the plug.. Lean? Airleak? Quote Link to comment Share on other sites More sharing options...
LeroyJones Posted March 16, 2013 Author Report Share Posted March 16, 2013 This may be comparing apples to oranges, but this is the same engine running BR8ES and 270 mains. Now that I look at them side by side the BR8ES is a lot cleaner. And the Road Banshee! Quote Link to comment Share on other sites More sharing options...
LeroyJones Posted March 16, 2013 Author Report Share Posted March 16, 2013 Looks like you have octane requirements covered by a long shot.. That is melted aluminum spatter on the base of the plug.. Lean? Airleak? Maybe lean. Porcelain doesn't look is though. Maybe I'll just shove the 270's back in to be safe. I was hoping I could get a definite answer with the plugs but it's a little more complicated than I thought. Quote Link to comment Share on other sites More sharing options...
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