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Old 07-31-2002, 07:10 AM
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Post tuning edelbrock carbs

I recently swapped my stock manifold/ and q-jet car in favor of an edelbrock RPM manifold and 750cfm carb. My engine is a mild performance about 330hp from an oldsmobile 350. and i was having trouble with the idle i had to crank the idle up other wise it would die while it was in park but driving it in gear it rumbles down REALLY low. is it a vacum problem and messes with my metering rods or is it the jetting?
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Old 07-31-2002, 01:43 PM
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Sounds like timing but could be a combination of carb tuning/vacuum leaks/timing. I would check the timing first and then look for any vacuum leaks. How is your idle mixture set?
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

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Old 07-31-2002, 02:20 PM
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Sounds like she may be running lean and the added load when in gear is bringing the idle down. Not for nothing but I recently bought an Edelbrock carb for my stang. Right out of the box the float was sticking, she stumbled on hard lefts and had a dead spot off the line. I took it off, put it back in the box, and made the store take it back. I opted to pay the extra and got a Holley Street Avenger instead. I've used nothing but Holleys for twenty years and I guess I'll be using them for the future as well. I'm going to try and post a shot of the new carb in my photo album, I like the features of the Avenger carb. Tunable secondaries and no more power valve blow-outs. Good luck with yours, I would start with richenning her up a bit and see what she does, recheck timing, and make sure there's no vacuum leaks. See if you can improve it by adjusting the air/fuel screws on the front of the carb before you go rejetting.
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