Durasi Knalpot 2tak

EXHAUS DURASI  

         RPM                                                      DURASI  

   10.000 – 11.000                                            194 ° - 196

                11.000 – 12.000                                            196 ° - 198 °

                12.000 – 13.000                                            198 ° - 200 °

                13.000 – 14.000                                            200 ° - 202 °

               14.000 -15.000       202-204                                       

 

 

 

RUMUS DURASI EXHAUS

T² + R² - L². 2  X  R  X  T

                                                                                                                                                                                    

        PANJANG STANG PISTON

          DURASI  EXHAUS = ( 180° – CO)  X 2                                                 

                                                                    

                       T = R + L – E

 

                       R = STROKE DIBAGI 2

 

                       L = PANJANG STANG PISTON

 

                       E = TINGGI LOBANG EXHAUS DARI T.M.A

 

 

 

EXE : 1  YAMAHA F.1.ZR

 

 STROKE : 52mm  TINGGI EXHAUS : 26mm     PANJANG CONROD : 96mm        

           R = 52 : 2 = 26mm    E = 26mm     L = 96mm     T = 26 + 96 – 26 = 96mm

6² + 26² - 96². 2  X  26  X  96

                                                       

                       

 

D = ( 180° – COS  ) X 2

                                                       

 D = ( 180° – COS O,135416666 ) X 2

   

D = ( 180° – 82,217 ) X 2

 

D = 97,782 X 2 = 195,565  →  DURASI EXHAUS = 196°  →  11.000 RPM

 

EXE : 2

 STROKE : 52mm        TINGGI EXHAUS : 25mm     PANJANG CONROD : 96mm

 

  R = 52 :2 = 26mm    E = 25mm     L = 96mm       T = 26 + 96 – 25 = 97mm

 

97² + 26² - 96². 2  X  26  X  97

                                                      

                       

 

D = ( 180° – COS ) X 2  

D = ( 180° – COS O,172283901 ) X 2

 

 D = ( 180° – 80,079 ) X 2

 D = 99,921 X 2 = 199,842  →   DURASI EXHAUS = 200°  →  13.000 RPM

* EXHAUST PIPE *

 

   L =  ED X42545

             RPM

                  

                

 L = PANJANG IDEAL KNALPOT . ( dari PISTON sampai pertengahan CONE BAFLE ).

 

  ED = Exhaust Durasi

 

 RPM = Putaran mesin pada Exhaust Durasi

 

 

EXE : 1         EXHAUST : 26mm    DURASI : 196°     RPM : 11.000

                                 

                          L =    196 X 42545    = 758mm

                                     11.000

                                  

              

EXE : 2        EXHAUST : 25 mm    DURASI : 200°      RPM : 13000

 

                     

        L=             200 X 42545        = 654.5 mm

                                13.000

                                  

* HEADER            

Ø Port dalam exhaust :   100cc → 140cc      34mm → 40mm 

                                             140cc → 175cc      40mm → 46mm

 

    Panjang haeder :      7.8 → 8.8  x Ø Port exhaust

 

   Sudut header :    1° →  2°   max  (  road race ) .   2°  →  3°    max     ( motocross )

  * FLANK .       Jarak antara piston dan header   :  60mm – 80mm

 

  * DIFFUSER           Sudut Diffuser :     Stage 1 =   6.5 °  →  7.5 °

                                                                 Stage 2 =   4.5 °  ;    7.5 °

                                                                 Stage 3 =   4.5°    ;    7.5°   ;     9° → 10°

 

  *BELLY                  

Ø Belly  2 → 3  X  Ø Port exhaust    Panjang belly  =  L – ( Header + Diffuser + ½ Bafle )

 

 

*BAFLE                   < Bafle   9°  -  12°

 

 

*STINGER                PANJANG PIPA                                    Ø DALAM PIPA

 

                     125cc – 145cc ------  150mm – 265mm                 19mm – 23mm

                     145cc – 175cc ------  150mm – 320mm                 22mm – 27mm