Main number 17082285, and another number 1293. You may not have this number on file. It is not computer controlled and no TPS. Was told it came out of an 85 Monte Carlo SS 350 engine from Mexico City. Here in the US, 350 was not an option for the Monte Carlo I'm told. No parts personnel have ever found the number, and I've never found it on the papers that come with the repair kits. I just order for later model Q-jet and the parts fit. I received the entire engine, the cast iron Q-jet manifold looks like it was cast for EGR, but the passages were never machined (I still have it the manifold if you want to see a picture of it).
I attempted to duplicate the calibration of an Edelbrock 1904, installed all the jets, hanger, metering rods. But had to run leaner jets on the primaries and I feel that is because it has an aneroid bellows and a 5th jet.
I love this carb, it suits my engine and emissions test under load on the rollers runs really clean and very responsive, makes really good power better than I ever expected it would. I just won't idle right, low CO's and high HC's. Can't screw the idle screws out far enough to help but they will kill the engine if I screw them in too far.
So, what do you think do I need to restrict the idle air bypass and richen the mixture? The bypass passages are wide open, would be easier for me to do this at the baseplate if possible. If so, what parts do I need and what would be a good starting point to drill them out to?
