Can someone tell me the ball park for out turns on the enrichner screws on a stock Q-Jet. Can you run me through the tuning sequence. I have no egr etc, engine is not oem, 350ci, performer highrise, headers, don't know about what's inside, just got her off the truck yesterday and she had a lot of moisture in her from sitting in rainsoaked Washington. Filled the tank with fresh fuel and methyl hydrate, changed the carb filter and sprayed some carb cleaner in her. Runs a lot better without spitting and farting but want to fine tune her now. Any help would be appreciated....

Usually 1 1/2 turns is a good starting point. If you have a vaccum guage, hook it up to a vaccum port on the engine. Turn in each adjustment screw the same amount until the vaccum drops. Then turn the screws out equally until you reach maximum engine vaccum. You may have to play with it a little, but each screw should have the same number of turns out. If you do not have a vaccum guage you can try to use your tach or adjust by ear. Then re-adjust your idle speed. Note, your engine needs be at operating temperature. Hope this helps...Oh yeah, be sure you do not have any vaccum leaks. This will effect your carb adjustments.

Ok, will play around with it and see what happens. I thought I read somewhere on this forum that screws should be between 4 and 6 turns out, but maybe I was seeing things. Appreciate the help

You can also adjust them with an unlit propane torch. Turn them in until the rpms drop and then back out to the point that the rpms come up about 100rpm when you flow propane into the primaries. You can also do that by cupping your hand over the primaries to richen the mixture. Joe

There is no exact number that will work for every car.
Turn both of your screws in all the way and count the turns. Average the number of turns and back them both out that number. This is only a starting point. If they are way off, start at 2 to 3 turns. Now using a tach and vacuum gauge, turn the screw in or out to raise the rpm and vacuum reading. You will find a small area, maybe a 1/2 turn where there is not much or any change. Turn the screws in as far as possible WITHOUT dropping vacuum or RPM. This is where the car will run best. The propane Drop method is for meeting emissions. Using your hand or unspecfied amount of propane will make very poor results. IF you want to go with emission setting, set the screws as stated before, then turn both screws in untill you get a 50 RPM drop. You must turn both screws evenly. EVERYTHING else must be operating correctly before you do this, or the setting will be off. Plugs, vacuum leaks, etc. IF you find this changes the engine RPM, reset the idle. If the idle is off more than 100 rpm, do the procedure again.
I worked as a tech for Chevrolet for 6 years. I am an ASE Master Auto, Master Truck, Master Paint and Body certified technician, fixed cars for 25 years, and now teach auto repair at a Stark State College of Technology.

I just bought my 75, will pick it up this weekend. It needs painted and some mechanical work. It's going to be a labor of love.

Good luck.

Thanks to you all for the advice. Will take a kick at the cat over the next few days. Appreciate all the input.