RUMUS PERHITUNGAN KNALPOT

Tuned                                                       EXHAUS VALVE OPEN DEGREE BEFORE B.D.C
R P M         

  50°  55°  60° 65° 70° 75°  80°   85°    90°
  8.000      21.5    21.9  22.5    23.0   23.6   24.1  24.6  25.2  25.8
  8.500      20.0     20.5 21.0    21.5   22.0   22.5   23.0 23.5   24.0
  9.000      18.7    19.2  19.6    20.1    20.6  21.1   21.5  22.0  22.5
  9.500      17.6    18.0  18.4    18.9     19.4 19,8   20,2   20.7   21.2
10.000     16.5     16.9   17.4   17.8     18.3 18.6   19.1   19.6  20.0
10.500    15.6      16.0   16.4   16.8    17.2  17.6   18.0   18.4   18.8
11.000    14.8     15.1    15.5   15.9    16.3  16.7   17.0  17.4  17.8
11.500     14.0    14.3    14.7   15.1    15.5  15.8   16.2  16.6  17.0
12.000     13.3    13.6    14.0    14.3   14.7  15.0   15.4  15.8  16.1



P =  850 X ED          3
        RPM
ID = √CC ______  X 2.1
          (P+3)X 25
IDS = ID² X 2 X 0.93

P = PANJANG HEADER ( INCH )                       RPM = PUTARAN MESIM MAXIMUM
ED = EXHAUS DURASI = 180° + KLEP EXHAUS MEMBUKA SBTMB


ID = Ø DALAM PIPA                     P = PANJANG PIPA HEADER ( INCH )

Ø PIPA HEADER MINIMUM SAMA Ø KLEP EXHAUS


IDS = Ø DALAM PIPA SEKUNDER




EXE :        EX CLOSE : 80° SB.TMB              RPM : 11.000               VOL CYLND : 110cc          P : 17.0” / 431.8mm
 
 
 
 
 




ID=             110               X 25
            17,0+3     X 25
ID = 0.98 ins / 24.89 mm
 
           
 
 
 
IDS = (       0.98X2                ) X 0.93                
IDS = 1.28 ins / 32.7 mm
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