From the Parts Counter
Spreadbore vs. Squarebore carburetors: What's the difference?
Quadrajet spreadbore squarebore Thermoquad
The Short Answer Spreadbore and Squarebore are terms used to describe the 2 major designs of 4-barrel carburetors. In a spreadbore design, the primary bores are smaller than the secondary bores. In a squarebore design, both the primary and secondary bores are the same size. Fig 1: Squarebore vs spreadbore The Longer Answer The bores (also known as barrels) are parallel chambers going from the top of the carburetor body to the bottom (base) of the carburetor body. They are the chambers where fuel and air are mixed together to create the combustion charge that makes the engine run. ...
Varajet 2SE vs. E2SE: What's the difference and which one do I need?
2SE vs. E2SE Varajet Varajet 2SE Varajet E2SE
What is an idle stop solenoid and why do I need one?
dieseling idle speed idle stop solenoid run-on
The engine that won't die. Cars equipped with carburetors can suffer "dieseling" or "run-on". This is more common when using unleaded fuel, but can happen with leaded fuel as well. Dieseling is when after the ignition is shut off (causing the spark plugs stop firing), the engine continues to try to run. Perhaps you're familiar with the symptom- you turn off the engine and it starts coughing, bucking and clanking, sometimes for up to 30 seconds. Aside from being embarrassing, repeated occurrences of dieseling can actually damage your engine. What causes dieseling? When the ignition is turned off, the spark...
NOS vs OE vs OEM vs Aftermarket Parts - What you need to know