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Old 06-27-2022, 12:30 PM
rv8ch's Avatar
rv8ch rv8ch is offline
Join Date: Feb 2005
Location: LSGY
Posts: 4,704

Originally Posted by Hawg Driver View Post

Always open to other ideas out there…
Sounds like you've eliminated ignition, which leaves fuel and air.

How do the plugs look? Oily or dry and grey? Might give a hint if it's getting too rich or too lean.

Have you tested with no air filter?

You might also try a fuel flow test to see how many GPH your electric fuel pump can push out. You might also see if there are some bubbles in there, supporting the theory that there's air getting sucked in.

I'd also check the fuel tank vent lines for mud daubers.
Mickey Coggins
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Old 06-29-2022, 06:41 PM
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rjcthree rjcthree is offline
Join Date: Jan 2007
Location: Bay Village, OH
Posts: 1,026
Default EGTs

What do your EGTs do as you advance the throttle? Do they head over 1400F or head south? I think that’s the easiest way to tell what side of the mixture curve you’re on.

I’m over fueled as a result of tweaking the spray bar when I had an advanced timing problem in the dual mag I was sure I didn’t have. As a result, RC can get to 200F ROP at WOT at -500 ft DA. I’m always leaning for DA. I live on EGT as my primary input most days.
RV-9A N183RC/90432: tip-up, O320H2, Ellison, Dynon D180, CPi2, Sen GA, at KLPR
RV-8 83718, wing kit, tanks done, with a four year plus plan - on hold due to home move
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Last edited by rjcthree : 06-29-2022 at 06:44 PM.
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