Stroker getting better, but still struggling
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Stroker getting better, but still struggling



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?

Thank you,

Jim

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