Hey there gang,
Don't know if you recall but I fired up my stroker build late last year and had a ton of issues. Worked on it over the winter here and there and many of the kinks are gone. The timing is spot on, the compression is awesome, I resealed the intake, etc. The beast runs like a champ now - until it warms up and I try to bring the idle down for some carb adjustments. When I do so, it loads up, rich, to a point where it fouls the plugs and stalls out.
As a reminder, I am running two Edelbrock 1405s on the CH-28, with the Lunati 63799 cam. It's a 440 block that I stroked to 511. I am using 452 heads that I cc'd, so I am just north of 12:1 compression.
Here's some current theories I am chasing:
- I am running an electric fuel pump with a return regulator. With two different regulators I can't get the fuel pressure dialed below 7-ish PSI. I am thinking I need a bigger return line to get it to dial back at the regulator./ The reason I am chasing this is I am hearing from multiple people that Edie's like very little pressure - like 5.5 PSI - so it's possible the fuel pressure is pushing past the needle and seat and thwoing off my float settings.
- Tomorrow I am going to change the step-up springs to a weaker set. Another theory is that camshaft is producing such low vacuum that I am not keeping the metering rods down at idle
So does any of this makes sense? Any other thoughts or ideas?