10/27/2022 0 Comments Weber 32 tlf diagram![]() The main Venturi bears a number, stamped on its air cleaner side, showing its major striction size or smallest diameter. However, as a preliminary selection criteria, it will prove useful to refer to the Weber Catalogue and Adjustment Setting Tables where also the other elements needed for a correct adjustment may be found.įor an acceptable adjustment setting, any reduction in main Venturi diameter must be accompanied by a reduction in the diameter of the main (pilot) jet to prevent excessive mixture enrichment, as described later. The barrel diameter depends on engine and application specifications, and for this reason it will not be possible to give any detailed description here. Main Venturi diameter = barrel diameter x 0.7. ![]() The following relationship is thus used in calculations: The sharper the passage section variations, the more evident are the effects of this resistance. In fact, the task assigned to the main Venturi is to increase the vacuum acting on the carburettor main circuit in order to draw in and atomise the mixture the consequence is, however, an increased resistance encountered by the flow through the carburettor. Smaller, when better pick-up is desired with a penalty on maximum power. Greater, when maximum power at high rpm and maximum road speed are desired, or In C, another carburettor section in which, in lieu of the baffle, a round bar serves the same purpose the diameter is 24 mm. In B, section of a carburettor having an incorporated main Venturi with baffle for better mixture distribution and 25 mm diameter. WEBER 32 TLF DIAGRAM SERIES14 Disconnect the distributor vacuum hose from the carburettor.Main Venturis - In A, the main Venturi for a series DCOE carburettor having a 29 mm diameter. Take extreme care that fuel spillage is contained and that there are no naked flames in the vicinity of the work area. 13 Release the clips and disconnect the fuel hoses from the carburettor. This is required to meet legislation in certain countries.Ĭarburettor (Weber 32 TLF) - removal and refittingġ2 Remove the air cleaner. It is advisable to fit a new tamperproof cap to the mixture screw if it is intended to take the vehicle overseas. ![]() 11 Switch off the engine and remove the test instruments. Re-adjust the idle speed screw to bring the idle speed to the specified level. 10 If an exhaust gas analyser is not available, turn the mixture screw anti-clockwise to obtain maximum idle speed and then turn it clockwise until the speed just starts to drop. 9 With the engine at normal operating temperature and idling at the specified speed, turn the mixture screw until the CO percentage is within the specified tolerance (photo). 8 Prise out the tamperproof plug and connect an exhaust gas analyser to the car in accordance with the instrument manufacturer’s instructions (photo). If, however, the idling is not smooth or the engine or carburettor haveīeen extensively overhauled, the mixture may require adjusting. 7 The idle mixture is set in production, and the adjustment screw is sealed with a tamperproof cap. Turn the idle speed screw on the carburettor until the speed matches that specified (photo). 6 Have the engine at normal operating temperature and idling. 3 The throttle valve block, although incorporating coolant hose stubs, is not in fact coolant-heated.Ĥ A solenoid-operated idle cut-off valve is fitted to prevent running-on (dieseling) when the ignition is switched off.Ĭarburettor (Weber 32 TLF) - idle speed and mixture adjustmentĥ If the car is not equipped with a rev counter, connect one in accordance with the manufacturer’s instructions. WEBER 32 TLF DIAGRAM FULL2 The unit incorporates an automatic anti-flooding device, a full power valve and an accelerator pump (photos). ![]() Warning: Refer to the beginning of this Section before starting any work.ġ This carburettor is used on the 999 cc engine and is of the single venturi downdraught type, with a manually-operated choke (cold start). ![]()
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