Season is coming soon here in NY, so its time to think of all odd/ends before putting it on the water.
I have relatively new crate chevy 350 pre-vortech engine with edelbrock performer intake manifold and rochester quadrajet carburetor # 17080562. New wires and coil.
Last season I experienced chattering noise at the WOT ~4500RPMs.
I believe its running lean.
It would not chatter right away but after say 30sec. Once throttled down, and process was repeated to WOT again...it would start chattering right away. Weird.
I had my timing screwed up once so this time is dialed in, to the extent of the existing tachometer (which now that i think of it could be not accurate at all).
Now. Having better flowing intake manifold and slightly more powerful engine (rated 270hp ) would carburetor require to have needles/seats adjusted?
Anyways, here are the photos of plugs i pulled before winterizing:
I have relatively new crate chevy 350 pre-vortech engine with edelbrock performer intake manifold and rochester quadrajet carburetor # 17080562. New wires and coil.
Last season I experienced chattering noise at the WOT ~4500RPMs.
I believe its running lean.
It would not chatter right away but after say 30sec. Once throttled down, and process was repeated to WOT again...it would start chattering right away. Weird.
I had my timing screwed up once so this time is dialed in, to the extent of the existing tachometer (which now that i think of it could be not accurate at all).
Now. Having better flowing intake manifold and slightly more powerful engine (rated 270hp ) would carburetor require to have needles/seats adjusted?
Anyways, here are the photos of plugs i pulled before winterizing:
