Re: 454 losing power at high RPM question
I put new fuel into her today, the good stuff. Supreme non ethanol.
The engine only has about 35k on it and has an aftermarket mild/stock hydraulic cam.
As Chad wrote, the engine should need about 6-650 CFM. But...that may be appropriate for an engine that GM wanted to fit multiple apps and needed to be more reliable than muscular.
The guru's usually say that engine problems tend to be more on the electrical side than on the carb side. My plugs look very good. A mild brownish tinge with no oily deposits. Breakerless ignition is new as is the ignition wires. New lifters and springs were installed at the time of the rebuild. I guess there is alway the possibility of a weak spring that made it past the QA process. Thats why I am narrowing it down to the carb.
Does anyone know if there is a carb, regardless of brand , that is a spreadbore, but over 650CFM?
69 SS/RS Fathom Green 454 4 speed
Bumper sticker- My other auto is a .45