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  #1  
Old 12-01-2014, 05:29 PM
AJ85WA's Avatar
AJ85WA AJ85WA is offline
 
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Location: Perth, Australia
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Arrow Exhaust lead build up?
Hey guys

Engine is Lycoming o-320 160hp carb running AVGAS with 4 into 2 vetterman exhaust.

I am seeing at the two exhaust tips what looks like lead crystals forming, imagine looking at ice crystals in a freezer forming long spikes. Well the spikes past the exhaust tip is only about 2/16 long max.

Is this normal?
I forgot to take a picture

Engine is making great power and only has 200hrs since rebuild.
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Last edited by AJ85WA : 12-01-2014 at 05:30 PM. Reason: spelling
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  #2  
Old 12-01-2014, 08:49 PM
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RV10inOz RV10inOz is offline
 
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Location: Brisbane Qld. Aust.
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Default
Too much rich running?

One other significant contributor is the refinery supplying your Avgas. They use more TEL than the other one in Australia due to a lower spec alkylate.
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  #3  
Old 12-02-2014, 05:53 AM
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AJ85WA AJ85WA is offline
 
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Default Thanks Dave
Hi Dave

Thanks for the reply, I will grab a picture next time, but don't think it's serious, I was just more curious😃

BTW what is TEL?
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  #4  
Old 12-02-2014, 05:58 AM
RKellogg RKellogg is offline
 
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Location: Newark, IL
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Arrow Tetra Ethyl Lead
Tetra Ethyl Lead
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