I have a 1980 Coupe with a 351w that is rebuilt. The car did sit for ten years and since then I have had the carb rebuilt, and the intake manifold gasket replaced. The car has also had a recent valve adjust which is what im thinking may be my problem..
The cam card called for .020 for the valve lash clearance. Well this was to much since the exhaust valves have these spacer type discs in them. I would take the car out for a drive and the spacer would slip out and I would have to pull over and tow it back home.. I ended up putting the clearance at .014 and it was fine after that.
The car only pulls 5 inches of vacuum at idle and it is steady. The car also runs really rich, even after downsizing the jets. The carb is a Holley 600 DP, has mechanical secondaries. No matter what I do with the metering screws the vacuum don't change..
Any help on where to look, or how to test if my valves are to tight would be awesome, thanks
The cam card called for .020 for the valve lash clearance. Well this was to much since the exhaust valves have these spacer type discs in them. I would take the car out for a drive and the spacer would slip out and I would have to pull over and tow it back home.. I ended up putting the clearance at .014 and it was fine after that.
The car only pulls 5 inches of vacuum at idle and it is steady. The car also runs really rich, even after downsizing the jets. The carb is a Holley 600 DP, has mechanical secondaries. No matter what I do with the metering screws the vacuum don't change..
Any help on where to look, or how to test if my valves are to tight would be awesome, thanks