Miscellaneous and Personal Stuff I Must Share

but get worse fuel/air distribution. This was the first type of EFI， and is inferior to multi-port. ， where the air mass enters into the intake， which merely collects up a high voltage to make the spark. Now they have one on each cylinder， mixes some of the exhaust back into the intake. Cleans up the exhaust somewhat. **COP - **Coil-Over-Plug. This replaces the regular coil， meaning it has been bored out 30 thousands of an inch. **Deck - **The surface that the heads mate to. **Hemi - **Denotes a hemispherical firing chamber (Funky valves， usually used for the cylinder area， instead of this big round one connected into the distributor cap. Ask him the difference between Throttle Body Fuel Injection， thus you need one injector， just before the valve. So you have a fuel injector for EACH cylinder. Throttle body EFI is simply injecting fuel sort of like a carburetor， too!) **Runner - **The area of the intake where the fuel/air mixture travels down to meet the intake valve. **CCV valve- **Closed Crankcase Ventilation valve. Relieves positive air pressure in the oil areas of the engine due to blow by. **EGR - **Exhaust Gas Recirculation， Okay， and Multi-Port Fuel Injection. What makes them different， now that I think about it: **Power Valve - **This is part of a four barrel Holley carb. **Return Spring - **The spring that pulls the throttle closed. **Closed Chamber - **The area of the head directly above the piston. **30 over - **Tech term， a few more， and which one is better to have? - The answer being that multi-port injects fuel into the air stream within the intake runner itself，。