Need input on carb adjustment

[Jeff70]

Hey guys I sent my eldelbrock q-jet to cliff's for a rebuild. My car is a 71 cutlass with a stock 350.

First what would the factory air/fuel mix screws setting be?

And it was running fine under load when I put it on except at idle it smelled rich and had a rough idle, then I started screwing with the mixture screws now it smells rich idles even worse and throttle response is not as crisp.



Right now I'm set at 4 turns out from the bottom, anybody have a suggestions and where I should be set at? Cliff said this carb is a 1910 and was way to big so he lowered the jetting and set it at 3 turns out.


Jeff

[Gitter Dun]

I am not familiar with Edelbrock carb,s, but the first thing I would do is check the float level. Once your sure that is correct I would start playing with the air bleed screws and get it to idle decently. Once it was idleing descent I would check the timing. Once the timing is dialed stay with the carb until you have corrected the problem.

[Pro Stock]

Try this guy, he's the best on Q-Jet style carb that I know of

Dale


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Jeff

[John Wright]

Keep an eye on the fuel pressure...those needles and seats don't like much above 5.5-6psi and they just won't hold the fuel back while idleing.

[Jeff70]

Thanks for the reply guys, tomorrow I'm gonna pull it out and play withnit a little more.


Jeff

[Vegas69]

4 turns will make it pig rich at idle unless your idle feed restrictors are way to small. Start with 2 turns and go from there. You can use a vaccum gauge or rpm to tune for the cleanest idle. The highest vaccum and or rpm nets you the cleanest idle. Then you can fatten it a hair from there to get your drivability.