Counterweighted Parallel Valve
Actually the counterweighted parallel valve version is only about 5-6 lbs heavier than the non-counterweighted version. The extra 30 lbs or so that an angle valve adds over most parallel valve versions amounts to 7 lbs per cylinder each + a few lbs for the oil pan + the counterweights, so admittedly the angle valve version is really only 25 lbs heavier than the counterweighted parallel valve version. Still, the counterweighted parallel valve version is much smoother and ideal for use with a CS prop.
I chose the Ellison over the Bendix FI since it was half the cost, is lighter by a few pounds, fits on the bottom of the sump in an updraft configuration just like the original carb did (remember, the engine I had was originally a O-360-A1F6D variant with a carb), and doesn't require a high pressure fuel system. Also, I needed a system that allowed inverted flight operations since I have a full inverted oil system installed. The Ellison has proven to be a great way to go, and in my opinion is slightly better than the Bendix FI system compared to it in both cost and complexity. It also gives about 1" more manifold pressure at 8000' at wide open throttle than the Bendix FI, and about 2" better than a carb!! The mixture distribution is way better than a carb, but not as good as the Bendix FI (surprisingly though it actually comes close to the Bendix FI since my exhaust gas temps are no more than 50 deg in variance between any of the cylinders!
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Linear Mode
