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I agree, Ernest, having flown over 325 hours with essentially no manifold-referenced pressure regulator, it is certainly not critical to have a manifold referenced one for the EC2.
However, a number of folks sorting out their initial engine start up have found mediocre or poor low rpm idle - and if they are using a "boost" referenced regulator and assuming (as I did) that it also adjusts for "vacuum" levels in the manifold, this may contribute to the problem. You can compensate for this (to some extent) by adjusting the MAP values through programming - but, not completely.
In my case, I just don't like taxing by all the Lycoming guys with an engine that sounds like it is not in perfect tune.
ED
There may be other solutions, but given Ed's experience with nothing more than a rough idle, I think staged injectors and the acceptance of a little roughness at idle will let you use any pressure regulator you choose.
-- ,|"|"|, Ernest Christley |
----===<{{(oQo)}}>===---- Dyke Delta Builder |
o| d |o http://ernest.isa-geek.org |
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