In this paper of the S shaped diffuser with area ratio (AR) 1.5, an experimental investigation was conducted to a nalyze the effect of the change in curvature of a straight wall diffuser. During this study, a Straight diffuser was changed in to a curved diffuser at different angles as their same upper and lower limbs (60/60, 90/90). Profile equations of diffusers were generated with the help of MATLAB /Simulink v2017a software In this work centerline length is constant for all three profiles, Centerline length that’s utilized in the sector of circle and radius of curvature is calculated . S shaped diffuser had a differe nt unique angle with square inlet and a rectangular outlet. S shaped diffuser C PR and C TL results compared with a straight walled diffuser with the different inlet velocity and Reynolds Number. These outcomes from this research obtained the coefficient of static pressure gain and coefficient of total pressure loss for the three profile of the diffuser (Straight, 60/60, and 90/90 S Shaped Diffuser).