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1. 09:07 AM - Odd running cylinder (Ralph E. Capen)
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| Subject: | Odd running cylinder |
Just so everyone understands the configuration:
RV6A
SamJames cowl/plenum
AeroSportPower built XP IO360B1F6
9.2:1 pistons
AFP injection (Flow balanced to .1gph per AFP instructions)
LASAR ignition (MAP monitor on #4, CHT monitor on #3)
Vetterman Dual crossover exhaust with heater/mufflers
MT three blade MTV12B183-59 propellor
During the first few minutes of operation (essentially through climb-out and throttle-back),
my number one cylinder indicates a higher CHT and EGT.
Neither the CHT or EGT raise to a dangerous level and both return to normal upon
establishing cruise settings.
My number one cylinder also has an injector restrictor that is 5% larger than the
other three in order to balance fuel flow for leaning purposes.
This has occurred seven out of the last eight flights. The missing one is kinda
in the middle.
Data capture is through an AFS3400EM at 1 second intervals. I have data and graphs
if someone wants to look-see.
I am wondering if I might have something in the fuel injection distribution spider
that is partially blocking one line below a certain flow rate.
Any other thoughts,
Ralph
RV6A N822AR @ N06 70 hours
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