messed with the apt on the qjet on the truck. got it as best it can be without hooking up an afr gauge but the thing burns enough oil i dont wanna ruin the sensor part.
idk what the "proper" method is, but i would cruise 1500ish rpm, punch it, and keep turning the screw up/out .5 turn from the initial 1 turn from seated setting until it stopped getting uh gooder. ended up at 2.5 turns. keep in mind this carb was literally built from random garbage i had in my garage, and probably has around 300k on it. Long story short it was on my dad's 81 gp when he got it in the early 90s, he sold the car to my uncle when the trans blew and he kept the engine. out of curiosity about 15 years after that we picked the carb up to use on my regal with the first buick 350, but we took it apart, got distracted boxed it up, and lost every part but the airhorn, main body, and throttle plate. so every innard is from random qjets. it has matching jets and rods (side to side), but i have no idea what they are lol.
I also replaced the #5 plug with a spare, it was gummed shut. All 7 others were too lean if anything.
in short, dialed cobbled qjet with nary a single new part inside as best i can without hooking up an afr gauge. gets about 7ish mpg going 80 miles round trip a day to work at 3krpm.
idk what the "proper" method is, but i would cruise 1500ish rpm, punch it, and keep turning the screw up/out .5 turn from the initial 1 turn from seated setting until it stopped getting uh gooder. ended up at 2.5 turns. keep in mind this carb was literally built from random garbage i had in my garage, and probably has around 300k on it. Long story short it was on my dad's 81 gp when he got it in the early 90s, he sold the car to my uncle when the trans blew and he kept the engine. out of curiosity about 15 years after that we picked the carb up to use on my regal with the first buick 350, but we took it apart, got distracted boxed it up, and lost every part but the airhorn, main body, and throttle plate. so every innard is from random qjets. it has matching jets and rods (side to side), but i have no idea what they are lol.
I also replaced the #5 plug with a spare, it was gummed shut. All 7 others were too lean if anything.
in short, dialed cobbled qjet with nary a single new part inside as best i can without hooking up an afr gauge. gets about 7ish mpg going 80 miles round trip a day to work at 3krpm.