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