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
PANJANG STANG PISTON DURASI EXHAUS = ( 180° – COS ) 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
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
D = ( 180° – COS ) X 2 D = ( 180° – COS O,172283901 ) X 2
AB
C
PANJANG STANG PISTON
Panjang stang piston : ½ A + B + ½ C
T² + R² - L².2 X R X T
96² + 26² - 96².2 X 26 X 96
97² + 26² - 96².2 X 26 X 97
D = ( 180° – 80,079 ) X 2
D = 99,921 X 2 = 199,842 → DURASI EXHAUS = 200° → 13.000 RPM
* EXHAUST PIPE *
L = 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 = = 758mm
EXE : 2 EXHAUST : 25 mm DURASI : 200° RPM : 13000 L = = 654.5 mm
* 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
200 X 42545. 13.000
196 X 42545. 11.000
ED X 42545. R P M
* 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
* TIDAK DIPERBOLEHKAN MULAI MENCOBA DENGAN Ø PIPA KECIL DAN PANJANG / Ø PIPABESAR DAN PENDEK
DILUAR DARI DATA* UNTUK ROAD RACE. PANJANG STINGER DISARANKAN
JANGAN MELEBIHI 150mm & MEMAKAI Ø PIPA TERKECIL PADA DATA .
D1 = Ø PORT EXHAUS / Ø CONE KECIL HEADER D2 = Ø CONE BESAR HAEDER / Ø CONE KECIL DIFFUSER D3 = Ø CONE BESAR DIFFUSER / Ø BELLY / Ø BESAR BAFLE D4 = Ø STINGER
* EXE 1 : ED = 196° RPM = 11.000
HEADER = Ø PORT EXHAUS = 40mm . PANJANG = 8 X . < SUDUT = 1.5° FLANK
= 70mm
. DIFFUSER = < SUDUT 1 STAGE = 7° .
BELLY = Ø BELLY 2.5 X PORT EXHAUS .
BAFLE = < 11° .
STINGER = Ø 23mm .
HEADER
L =ED X 42545 R P M
D1 D2
D3
PISTON
FLANK
DIFFUSER BELLY
*HEADER* Panjang total header = P . H = 40mm X 8 = 320mm Panjang header efektif = 320mm – 70mm = 250mm Ø D1 = 40mm D2 = [ ] + D1 D2 =[ ] + 40 = 53.1 mm → 53 mm
B¹
C
C¹
B
Ø C = + ØC¹( B-B¹) X 2 Cot ∆ A
PH X 2 .COT H
250 X 2 . 38.19
*DIFFUSER*
Ø D3 = 40 X 2.5 = 100 mm
Panjang diffuser . = P . Diff = ( ) X COT . Diff . P . Diff = ( ) X 8,1443 = 191 mm *BAFLE* Panjang baffle total = P . Baf . T . = ( ) X COT. Baf P . Baf . T = ( ) X 5,1446 = 257 mm
*BELLY* Panjang belly = L – ( P.H + P.Diff + ) P . Bel = 758 – ( 320 + 191.4 + ) = 118 mm
*CARA MEMBUAT CONE* *BAFLE* Panjang Bafle efektif = P.Baf e = ( ) X COT . Baf P . Baf e = ( ) X 5,1446 = 198 mm
DIMENSI BAFLE :
A.B = 257,2 mm B.C = 50 mm
A.C = A.C² = A.B² + B.C²
A.C² = 257² + 50² = 68549
A.C = √ 68549 = 262 mm
A.B1 = A.B – B.B1 = 257 – 198 =59 mm
B1.C1 = 11,5 mm
A.C1 = AC1² = A.B1² + B1.C1²
A.C1² = 59,2² + 11,5² = 3636,89
A.C1 = √ 3636,89 = 60,3 mm
D3 – D2 2
100 – 53 2
D3 2
100 2
P.Baf 2
257,2 2
D3 – D4 2
100 – 23 2
BAFLE TERBUKA :
AB1
C1
B
C
* CARA MEMBUAT CONE HEADER
C1
C
A
MENCARI SUDUT A .
1. C = Π X D
C = KELILING
Π = 3.1416
D = Ø BESAR CONE
C = 3.1416 X 100 = 314,16
2. Ө = C/r
r = A.C
Ө = 314.16 = 1.199 RADIANS
262
3. 1.0 RADIANS = 57,3 °
< A = 1,199 X 57,3° = 68,7 °
MUFFLER
AB = ( ) X COT. H = ( ) X 38.19 =1012mm BC = 26.5mm
AC² = AB² + BC² = 1012² + 26.5² = 1024917.09mm
AC = √ 1024917.09 = 1012.35mm
MENCARI SUDUT A
C = Π X D C = 3.1416 X 53 = 166.5
Ө = = 0.164
Ө = 0.164 X 57.3° = 9.4°
D2 2
53 2
166.5 1012.3
250mm – 300mm
° 11°
Modif knalpot std RX – K
P = 40mmØ = 22 mm
Modif full std RX - K
P = 40mmØ = 19 mm
Ø = 19 mm Modif knalpot std F 1 ZR
° 9°
Ø = 19 mm
60mm
80mm
Modif knalpot std F 1 ZR
° 9°
Ø = 19 mm
DIPOTONG Modif knalpot std SATRIA
Ø = 25 mm
Modif muffler std NINJA
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