How,Maintain,the,Carburetor,an car How to Maintain the Carburetor and Fuel System (5)
General Lee: For such a TSP platform, indeed, is the test of the ability to integrate the same time, just She always has been mentioned in the business platform is a completely independent intellectual property platform and our platform is t In the shape of the design, the Core wing broke through the traditional appearance of the other models, the Core-wing sense of movement and high-level sense of the high degree of balance, which must be improved, both in the interior styling
Adjustingthe Carb JettingWhetheryou have a Demon or a stock HOLLEYý carburetor, jetting should be fairly closeif the carburetor is used in the intended application. For maximum performance,increase or decrease jet size two numbers (primary and secondary) as required.As long as the performance continues to improve, continue increasing ordecreasing jet size. At some point, ET or lap times will start to fall off,which means the mixture has been moved past the optimum air/fuel ratio. At thatpoint, move one jet size at a time in the opposite direction until optimum performanceis achieved.Alwaysjet for performance, not spark plug color. Most high-energy ignitions willleave very little residue on the plugs. With a drag car, plugs can remain bonewhite so attempting to ýreadý spark plugs is a waste of time. With an ovaltrack car, the plugs will color, but the process takes longer with ahigh-energy ignition. If the car runs a little too hot, jetting up one or twosizes will alleviate the lean condition without hurting performance, becausethe ignition will burn off the extra fuel and cool the engine. However, if jetsize is increased but the engine appears to be running leaner, a fuel systemproblem is indicated. If a conventional ignition is used, jetting for bestperformance is still the way to go, but the plugs will take on a tan colorafter a short time. Problem-SolvingGenerallyan engine will pop, miss or surge if it's lean, although an excessively richcondition can cause the same problems. As a rule, cool, dense air requireslarger jets, while hot thin air requires smaller jets. Also, whenever acarburetor spacer is added or removed, a camshaft, cylinder head or intakemanifold change is made; it will be necessary to retune the carburetor to regainmaximum performance. ExtensionsAnotherproblem that will cause a stumble or hesitation is when the secondary jetsbecome uncovered, and no amount of accelerator pump tuning will cure it. Thisoccurs when a car leaves so hard that G-force loading on the fuel in thesecondary bowl causes it to be pushed up against the rear wall, uncovering thejets. BG Fuel Systems Stainless Steel Jet Extensions will correct thissituation. Whenever jet extensions are installed in a carburetor equipped witha secondary power valve, the power valve must be removed and the hole plugged.Jet size must then be increased accordingly. PumpCircuitryEvenwhen the jetting is within the ball park, this is no guarantee of optimalperformance. Performance will be poor if the accelerator pump nozzle (squirter)diameter is incorrect. If a car is sluggish during initial acceleration and apuff of black smoke blows out of the headers when a drag car leaves thestarting line, or when an oval track car comes off a corner, the accelerator pumpnozzle diameter may be too large. Fuel spilling out of the vent tubes isanother possible cause. The latter problem is easily cured by running a rubberhose from one vent tube to another, with a slot cut at the top of the hose. Aswith jetting, determining the best squirter diameter is accomplished bytrial-and-error testing. Simply adjust size up or down for best performance. Find out more about Proton wira carburetor by visit miparts.com.
How,Maintain,the,Carburetor,an