salam semua...ni lah gambaran stesen bas hentian putra....begitu ramai orang

Contoh Kiraan Ratio

PENGIRAAN DIAMETER KESELURUHAN RODA (termasuk diameter rim dan ketebalan tayar)


saiz tayar = 155/70/12 { ukur lilit = 2 X PAI X J(diameter keseluruhan tayar / 2) }

70% X 155mm X 2 = 217mm (tebal tayar untuk 2 bahagian) + 12inci (diameter rim) , 12inci = 300mm

217mm + 300mm = 517mm / 2 = 258.5mm (Jejari keseluruhan roda)

2 X PAI X J = 2 X 22/7 X258.5mm = 1624.857mm = jarak untuk satu putaran tayar di atas permukaan jalan

p/s : dengan mengandaikan tayar yang diukur ini diperbuat drpd bahan yg tidak fleksibel - bukan getah



PENGIRAAN NISBAH PUTARAN RODA BERBANDING PUTARAN ENJIN


ratio gear 1 = 3.500, ratio final drive = 4.473

katakan RPM pada masa gear 1 = 7000 putaran/minit

jumlah ratio untuk gear 1 berbanding enjin = 3.500 X 4.473 = 15.6555

pada masa itu, pusingan tayar = 7000 / 15.6555 = 447.127 putaran seminit = 447.127 putaran X 60 sejam

pusingan tayar dalam masa sejam = 26827.62 putaran sejam


PENGIRAAN KELAJUAN KERETA

1624.875mm X 26827.62 putaran sejam = 43591529mm sejam

ini bermakna kereta bergerak 43.6km/h pada putaran enjin 7000RPM pada gear 1

Kiraan Gearbox Ratio

Rim&tayar : 215/45/17
RPM : 3000

FTO Gearbox

1gear : 23km/j
2gear : 42km/j
3gear : 59km/j
4gear : 79km/j
5gear : 99km/j

GSR Gearbox

1gear : 24km/j
2gear : 41km/j
3gear : 61km/j
4gear : 83km/j
5gear : 112km/j

GSR Finaldrive EVO

1gear : 22km/j
2gear : 37km/j
3gear : 55km/j
4gear : 75km/j
5gear : 102km/j

GSR Finaldrive & top gear EVO

1gear : 22km/j
2gear : 37km/j
3gear : 55km/j
4gear : 75km/j
5gear : 93km/j

CK/CJ Gearbox

1gear : 25km/j
2gear : 39km/j
3gear : 55km/j
4gear : 74km/j
5gear : 93km/j

semua result diatas mengunakan Rim 17 tebal tayar 45 siri

try la kiri2 dgn guna calculator di bawah tu...sama2 kita belajar

http://www.apexgarage.com/tech/gear_ratios.shtml

Tayar

Tahukah anda mengenai detail tentang spec tayar anda..............
Contoh : Maksimum speed tayar anda mampu tampung, Maksimum load tayar anda mampu tampung dan lain2 lagi....................





kebanyakan tayar mempunyai kod dan marking di sebelah wall tayar.
Setiap kod melambang berapa maksimum load dan kelajuan yang boleh dibawa oleh tayar bekenaan.........

Contoh : 91V

91= Ini menunjukan berape maksimum load setiap tayar, kalau berdasarkan kod nie setiap tayar boleh menampung maksimum load sebanyak 615kg.

V= Simbol ini pula menunjukan maksimum kelajuan yang boleh ditampung oleh setiap tayar hanya 240km/j.



So kepada yang biasa bawa lebih dari 200km/j sila beri perhatian pada tayar anda jangan pakai tayar kod Q,R,S dan T.................
Utamakan keselamatan anda, keluarga dan juga kepada yang menumpang kete anda...........

Tarikh pembuatan dia ada tertera pada kod TIN (DOTXXXXXXX3005)......
Yang perlu diberi perhatian adalah 4 angka kat belakang tayar........

Contoh : DOTXXXXXXX3005
30 tu melambangkan minggu keberapa tayar nie dibuat
05 adalah tahun (2005)

Warranty daripada syrikat pengilang adalah dalam masa 5 tahun je lepas 5 tahun boleh dikonsider sebagai barang dah luput dan tak selamat........

sumber: www.mynismoclub.org.

sekadar berkongsi bbrpa info & maklumat tambahan ttg tayar....





ref: Tire_code

Gearbox Ratio

The VR4 and GSR gearbox share most of the same gear ratios believe it or not. Howeverm the drop in first gear ratio is why the VR4 gearbox isnt really suited for performance applications as its slower off the mark and purposely made to pull a heavier car up to speed (although some people prefer the lower ratio for less wheel spin on take off e.g. FWD's, or people having difficulty getting power to the ground on high RPM take off).

Here is a comparison...

VR4 - 2.846; 1.684 (2nd); 1.115 (3rd); 0.833 (4th); 0.666 (5th); 3.166 (Reverse); 3.866 (Front Diff); 4.933 (Final)
GSR (W5M33) - 2.916; 1.684 (2nd); 1.115 (3rd); 0.833 (4th); 0.666 (5th); 3.166 (Reverse); 4.933 (Final)
Also GSR (W5M33) - Transfer 1.090; Final Front 3.8666 (or 2.936); Final Rear 4.9333 (or 4.525)

Going to a lower (numerically higher) gear will increase your RPMs at a given speed but improve your off the line performance. A higher (numerically lower) gear will get you off the line slower but keep your RPMs lower at a given speed.

Changing your tires will also affect the "effective" gear ratio. A taller tyre/wheel combo than stock will have the effect of going to a higher gear i.e. 17" rims. A lower gear counteracts the taller tyre/wheel combo to a degree.High number, high RPMs, high "kick". Low number, low RPMs, low "kick".

EVO 1-3 gearbox ratios below:
The gear ratios are on lancerregister.com under 'evo 1-3 buyers guide'
Here they are anyway:

Evo1:
2.571 (1st)
1.600
1.160
0.862
0.617 (5th)
Rear diff: 3.909

Evo 2-3: (Evo 3 has slightly different transfer and front diff ratio)
2.750 (1st)
1.684
1.160
0.862
0.617 (5th)
Rear diff: 3.909

Gsr: (CD5A)
2.917 (1st)
1.684
1.115
0.833
0.666 (5th)
Rear diff: 3.545


From NZMMC

some info on EVO/GSR/VR4 diff and transfer case ratios below which I got from NZMMC but not sure if they are correct:
VR4s and GSRs:
1.090 Transfer ratio (TR) (24/22)
3.867 (58/15) front diff ratio. (FDR)
3.545 (39/11) Rear diff ratio (RDR)
RDR x TR = 3.868 combined rear final drive
Total final Drive ratio TFD of 4.9333

EVO 1 and 2s:
1.090 (24/22) TR
4.266 (64/15) FDR
3.909 (43/11) RDR
RDR x TR 1.090 (24/22) = 4.264 combined rear final drive
TFD = 5.443

EVO 3
1.074 TR (29/27)
4.200 (63/15) FRD
3.909 (43/11) RDR
RDR x TR = 4.199 combined rear final drive.
TFD = 5.358

The total final drive TFD, is the diff ratio (front or rear+transfer) multiplied by the 37/29 (1.276) primary reduction inside the gearbox that occurs before the diffs.

Contrary to belief, converting one of these 4WD 'boxes to FWD will NOT change the final drive ratio, why the hell would it?

"and yes an evo 2 gearbox and evo 3 rear diff would work together using either the evo 2 or gsr transfer case"

Mitsubishi CC Lancer FWD

MANUAL GEARBOXES

1500cc Carburettor: 3.363 (1st); 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th); 4.021 (Final); 3.083 (Reverse)
1800cc MPI: 3.363 (1st); 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th); 4.021 (Final); 3.083 (Reverse)

AUTO GEARBOXES

1500cc Carburettor: 2.846 (1st); 1.581 (2nd); 1.000 (3rd); 3.600 (Final); 2.176 (Reverse)
1800cc MPI: 2.846 (1st); 1.581 (2nd); 1.000 (3rd); 0.685 (4th); 4.007 (Final); 2.176 (Reverse)

BATTLE OF THE FWD GEARBOXES


Proton Satria 1300cc: 3.363; 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th)
Proton Satria 1500cc: 3.363; 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th)
Proton Satria GTi / M21 1800cc DOHC: 3.083; 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th)-CodeF5M222VRXE
Mitsu CC Lancer 1500cc Carburettor: 3.363 (1st); 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th);
4.021(Final); 3.083 (Reverse)
Mitsu CC Lancer 1800cc MPI: 3.363 (1st); 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.777 (5th); 4.021 (Final); 3.083(Reverse)
Proton Satria 1600cc/ Cyborg MIVEC CA4A/ CJ4A: 3.083; 1.947 (2nd); 1.285 (3rd); 0.939 (4th); 0.756 (5th); 4.592(final)
At 100kmh revs should be about 3100rpm. The difference could be tyre size.
Cyborg MIVEC CJ4A: 3.071 (1st); 1.947 (2nd); 1.379 (3rd); 1.030 (4th); 0.767 (5th); 4.625 (final); 3.363 (Reverse)
At 100kmh your revs should be about 3160rpm (slightly higher due to higher final drive ratio) - This gearbox has different ratios throughout compared to others (except all 2nd gears are the same) - This one is made for pure acceleration provided you can get power to the ground

A CYBORG RS CJ4A with an ATS Final Drive Ratio of 5.000 will rev at 3416rpm at 100kmh. This gives quicker acceleration but lower top speed.

The top speed for a CJ4A is theoretically 237.32kmh.
With the ATS 5.00 ratio theoretical top speed is 215.86kmh.

Here are the 1995 GS-T Eclipse FWD 4G63 Turbo specs:

Engine Displacement: 1997 cc.
Engine Location: FRONT
Engine Type: TURBO
Engine Max Horsepower: 210 bhp @ 6000 rpm
Engine Torque: 214 lb-ft @ 3000 rpm
Compression Ratio: 8.5 :1
Maximum engine speed: 7000 rpm
Transmission Type: MANUAL
Number of Gears: 5
Gear Ratio 1st: 3.09 :1
Gear Ratio 2nd: 1.83 :1
Gear Ratio 3rd: 1.22 :1
Gear Ratio 4th: 0.89 :1
Gear Ratio 5th: 0.74 :1
Final drive ratio: 4.15 :1
Driving wheels: FRONT
Car test weight: 3220 lb.
% weight on front wheels: 61 %

The GS-T Eclipse's ratios are totally different to any of the other Mitsu AWD or FWD specs above and interesting to see the first gear 3.09 slightly higher than the M21/GTi/Satria 1600/MIVEC boxes 3.08.. the rest of the gears 2nd through to 5th are lower than the rest of the FWD boxes. This would make it the strongest and 'best of both worlds' FWD (not AWD) box I have seen so far (determined by ratios) except for first the gear... but the difference in 1st gear is so small a difference its virtually negligible. The GS-T's final drive ratio is about in the medium of all the others as well giving this box a nice spread over all the FWD boxes thus far. Will have to see what rpm/speed per gear stats it generates versus a converted AWD VR4 box and stock FWD GLXi box

OK, for those who like to see numbers I have ran 7 calcs on the FWD boxes at max RPM @ 7000rpm with 215/40/17 wheels. The speed/rpm is not perfectly accurate, but all the info from each gearbox was entered using the same calculation method so the comparison against eachother is accurate to see roughly how different they perform to one another. Pics here: http://orion2001.gallery.netspace.net.au/FWD-RATIOS

Found out the Hyundai Sonata gearbox is a KM210 - Yep, the same FWD gearbox used on the TN-TP Magnas!
TN Magna 2600cc KM210 gearbox: 3.166; 1.833 (2nd); 1.240 (3rd); 0.896 (4th); 0.666 (5th); 3.166 (Reverse); 1.192 (transfer gear); 3.411 (final)