Hi,

I have a 350 SBC with a Weiand 6-71 supercharger that I am trying to get fine tuned.

Firstly, some specs about the motor:

-Stock short block (I know, will be replaced this winter)

-AFR 195 heads
https://www.summitracing.com/parts/AFR-1036

-COMP XE-284H camshaft
12-250-3 - XTREME Energy

-Brawler 650 supercharger carburetors
https://rdracinginc.com/product.sc?p...0&categoryId=2


I have an AFR gauge installed, and it was reading very rich (i.e.: saturated at 10.0) under load. I have adjusted the carburetor main and secondary jets from 68 / 76 to 64 / 72. For the most part, this looks to have leaned out the motor correctly. all eight carburetor idle mixture screws are set at 1 full turn out.

Where I am now having an issue is with the following symptoms:

-hunting idle. The truck seems to hunt between 700-1000RPM now, which did not happen before when I had the carburetors in their stock configuration. Does this have to do with how I have set the idle mixture screws? I wouldn't think this would be affected by the re-jetting.

-slight stumble between idle and off idle. It almost feels like a misfire, but I have confirmed there is no ignition issues. What could be the problem here?

I am fairly new to carburated motors, but am keen to learn how to tune these things.

Thanks everyone, any help is greatly appreciated.

-Alex

Some pictures: