REFLECTOR: Exhaust systems

Scott Derrick reflector@tvbf.org
Wed, 09 Jul 2003 10:33:45 -0600


Are you LOP or ROP?

Scott

John Dibble wrote:
> At 2300 rpm/22" map, my EGT is 30 degrees higher on EI compared to the mag.  I'm
> thinking that the EI timing needs to be advanced.  However the current EI "settings"
> are already 4-5 degrees advanced beyond the 28 degrees specified for the Franklin
> engine.  If I adjust the EI "settings" to 28 degrees, it's much rougher and backfires
> on EI during run-up.  Any thoughts about using EGT/CHT to fine tune the timing?
> 
> John
> 
> Mike Pollock wrote:
> 
> 
>>I also run LOP with an IO-360, but only to a maximum of 50 degrees LOP.  The
>>soot is still there, but just not as dark.  The EI does nothing for the max
>>EGT reading though.  I can get the same EGT with the mag as I can get with
>>the EI.
>>
>>Mike
> 
> 
> 
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