A large number of plastic used in various sectors has a very bad impact on the environment. Plastic waste is difficult and cannot even be broken down, so plastic waste is the biggest contributor to global warming. One way to overcome this is by converting waste into fuel by the pyrolysis process. Pyrolysis is the process of thermochemical decomposition of organic material, which takes place without air or oxygen. The pyrolysis method has the advantage of not causing smoke and can reduce plastic waste in a short time. This study aims to utilize LDPE (Low-Density Polyethylene) and PP (polypropene) plastic waste which is converted into fuel in the liquid phase (tar) in the pyrolysis process with time variations of 30 and 60 minutes. The results of the pyrolysis process of LDPE (Low-Density Polyethylene) and PP (polypropene) plastic waste produce a different flow rate of liquid fuel (tar), PP (polypropene) waste produces a higher flowrate than LDPE (Low-Density Polyethylene) waste, because the different constituent components of LDPE and PP affect the combustion reaction. The variation of pyrolysis time, temperature, and path length affect the flow rate of liquid fuel (tar) resulting from the pyrolysis process. The longer the path to the condenser tube, the longer the condensation process will be, the less fuel produced and the better the quality of liquid fuel (tar), and the shorter the hydrocarbon chain.