Dave,
Thanks for sharing some of your experances and from 99% of the rich at idle cases I've seen is due to the idle Feed Restriction (IFR) that's too large and I think this is done intentionally by both Holley and Demon to ensure no customer comebacks with holes burnt in the tops of there pistions from being too lean.
One of my first experances with the Mighty 825 was on a friends built 455HO
and his mix screws were just off seat with stock jetting and the IFR was approx .038".....ended up washing down the engine...
when I worked on it I installed .035" IFR's and he purchased a new baseplate with the idle-eze adjustable bypass air system so he could maintain good throttleblade position and it now works great.
Doug,
Got your PM and I sent you one.
Last edited by shaker455; 06-28-2006 at 06:27 PM.
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