Originally Posted by
Dave Severson
Curious to hear what you fuel pressure is at idle when you get your fitting and gauge installed. Where do you have the vacuum hose to the distributor hooked up, ported or full vacuum? I ran a similar carb on an E-85 engine and ended up using a vacuum referenced fuel pressure regulator to keep the engine clean at idle, hard to say until you get an accurate pressure reading. Is this the same carb that was on it when dynoed? My two cents worth would be to get a fuel pressure gauge on it and see where the pressure is, check your needles and seats to make sure some little pieces of gunk aren't holding them open, then perhaps a fresh set of plugs. Cleaning them is good, but doesn't necessarily guarantee the plug is firing clean, once they've been fuel soaked they don't always get cured with just cleaning. Also, what are the plugs and what do you have them gapped at? You might also want to consider an initial timing at 10 or 12 degrees and back the total off to about 34 to get the initial run in on the engine. Just my 2 cents...