Hello,

I was wondering if there are any (cheap) possibilities to change the gear ratio's of a Cinq Gearbox. Or other types of Boxes.

Only one I know is from a Seicento Suite 2000.

Not only the fifth gear, but all of them.

1 Longer from about 35km/h to 55
2 Longer from about max70km/h to 90 ( Without Red rev. zone)
3 Longer from about max100km/h to 120
4 Longer from about max130km/h to 150
5 Longer from about max180km/h to 200

or
1st 10% L
2nd 10%L
3th 8% L
4th 8% L
5th 10% L

With about 140BHP the gearbox is much to short.

Greetzz Dennis

TurboCinqy1250 said:

With about 140BHP the gearbox is much to short.

Click to expand...

TurboCinqy1250 said:

Hello,

I was wondering if there are any (cheap) possibilities to change the gear ratio's of a Cinq Gearbox. Or other types of Boxes.

Only one I know is from a Seicento Suite 2000.

Not only the fifth gear, but all of them.

1 Longer from about 35km/h to 55
2 Longer from about max70km/h to 90 ( Without Red rev. zone)
3 Longer from about max100km/h to 120
4 Longer from about max130km/h to 150
5 Longer from about max180km/h to 200

or
1st 10% L
2nd 10%L
3th 8% L
4th 8% L
5th 10% L

With about 140BHP the gearbox is much to short.

Greetzz Dennis

Click to expand...

What about changing the diff rather than the gearbox??

Novitec sell a longer 5th gear, I'll get the link for you.

edit- see here...

TurboCinqy1250 said:

Hello,

I was wondering if there are any (cheap) possibilities to change the gear ratio's of a Cinq Gearbox. Or other types of Boxes.

Only one I know is from a Seicento Suite 2000.

....

With about 140BHP the gearbox is much to short.

Greetzz Dennis

Click to expand...

With 100bhp it's feeling too short, too!

Look out as the newer Seicentos have different driveshaft arrangements - the oil is held in by the cv boots and the joints are different - and also has a digital speedo sender arrangement.

Stilo diffs will be alot longer due to larger oem wheels...

Longest I know of is sei suite 1.1 non sporting doing just over 40mph in 1st.

but is the suite 1.1 non sporting the same length fifth or even shorter possibly? if not might be onto something :chin:

185/55/14 is 10% longer...

Asteris said:

185/55/14 is 10% longer...

Click to expand...

but will slow you down i suppose it'll be the same as having longer ratio's on 13's overall though need to decide if to keep my minilites on or put 14's back on i think

I've got 195 45 14 tyres and that's 3.8% bigger than standard.

How can I change the diff? Smaller diff is a smaller ratio through all gears, but how can I fit that. Cause the driveshafsts should go up for a few milimeter or less.
Or can I buy it somewhere direct swap or something like that.

:bang:

GhostWKD said:

but is the suite 1.1 non sporting the same length fifth or even shorter possibly? if not might be onto something :chin:

Click to expand...

I don't know for sure any more cause it's a while ago that i've seen that numbers. I though that the 2nd and 3th gear are longer. The rest I don't know.

GhostWKD said:

but is the suite 1.1 non sporting the same length fifth or even shorter possibly? if not might be onto something :chin:

Click to expand...

AFAIK its a touch longer compared to the Sporting

GhostWKD said:

but will slow you down i suppose it'll be the same as having longer ratio's on 13's overall though need to decide if to keep my minilites on or put 14's back on i think

Click to expand...

One can either change the gearbox for a longer one (like the one from the suite) or you fit larger perimeter wheels, it's the same thing. I let you figure yourself which one is the easiest and cheaper.

My turbo also needed a little bit longer ratio and changed from 195/45/14 wheels (3.9% longer) to 185/55/14 (9.3% longer).

Asteris said:

One can either change the gearbox for a longer one (like the one from the suite) or you fit larger perimeter wheels, it's the same thing. I let you figure yourself which one is the easiest and cheaper.

My turbo also needed a little bit longer ratio and changed from 195/45/14 wheels (3.9% longer) to 185/55/14 (9.3% longer).

Click to expand...

quite interested in the idea of a suite gearbox :chin: as i dont want to lose my minilites really (and they cost alot! )

did you find that the 185/55/14's were alot slower accelerating? although thinking about it you have a few more bhp than me so may not be as noticeable

In a turbo configuration you earn 50-60% torque, so you don't mind giving 10% back, in order to have a more usable revving area. In a N/A, where torque is not enough, wasting it with longer ratios would only make sense for fuel economy and less engine noise during long trips. Not exactly what the car was made for.

Anyhow, the suite gearbox is an option for the turbo owners, but the sporting is a close ratio one (at least 1st, 2nd, 3rd), something that most drivers would wish to have. Pity to replace it for the standard one.

So, the only cheap option is longer perimeter tyres. Unless one decides it's time for LSD with custom gearing...

Does somebody know the gear ratios from the seincento? 1998/2001 types

Cento 899cc

1-3.909
2-2.056
3-1.344
4-0.978
5-0.837
Final-4.071


1108cc non Sporting

1-3.909
2-2.158
3-1.345
4-0.974
5-0.766
Final-3.562


1108cc, Sporting

1η-3.909
2η-2.158
3η-1.480
4η-1.121
5η-0.829
Final-3.867

Asteris said:

Cento 899cc

1-3.909
2-2.056
3-1.344
4-0.978
5-0.837
Final-4.071


1108cc non Sporting

1-3.909
2-2.158
3-1.345
4-0.974
5-0.766
Final-3.562


1108cc, Sporting

1η-3.909
2η-2.158
3η-1.480
4η-1.121
5η-0.829
Final-3.867

Click to expand...

Just adding some gear ratio's for the Seicento (thanks to a Polish workshop manual and the Abarth I used to own):-

889cc
1 3.909
2 2.050
3 1.344
4 0.977
5 0.837
R 3.727
FD 4.071

1108cc
1 3.909
2 2.050
3 1.344
4 0.977
5 0.837
R 3.727
FD 3.562

1108cc
1 3.909
2 2.158
3 1.345
4 0.974
5 0.766
R 3.818
FD 3.562

1108cc Sporting
1 3.909
2 2.158
3 1.345
4 0.974
5 0.766
R 3.818
FD 3.867

1108cc Sporting Abarth(pre-facelift)
1 3.909
2 2.158
3 1.345
4 0.974
5 0.766
R 3.818
FD 4.071

A lower number final drive will give more miles per rev.

I tried to calculate the speed but I don't know for sure if I'm right.

What is the meaning of the final drive?
Gearing ratio and Diff ratio in combination with gearing or???

1108 non Sporting = (I Think )

(G/R x Final)

1st = 13,923:1
2nd = 7,687:1
3th = 4,791:1
4th = 3,469:1
5th = 2,727:1


Cinq Sporting =

1st = 15,116:1
2nd = 8,345:1
3th = 5,723:1
4th = 4,335:1
5th = 3,206:1

Wheel 1 round is 161,5cm with 195/45/14"Tyres (Dunlop SP 9000 almost new profile)

180km/h =6000RPM in 5th Gear (On the Speedo) = 50m\s

50: 1,615 = 30,9597 Wheel rev/sec

6000rpm/min = 100rpm/sec

100:30,9597 = 3,23 reduction in 5th gear

Check: Cinq Sporting = 3,206:1 so I think this is right.


With the non sporting gear ratio from Asteris it should be around 210km/h in 5th gear @ 6000rpm = 245km/h @ 7000RPM


(Without reving in red zone)

+- speed =
4th gear around 176km/h (140 sporting speed)
3th gear around 131,4km/h (110 sporting speed)
2nd gear around 76km/h (70 sporting speed)
1st gear around 44km/h (40 sporting speed)

(in miles km/h : 1,6)
(2,54cm = 1inch)

Greetzzz Dennis

TurboCinqy1250 said:

I tried to calculate the speed but I don't know for sure if I'm right.

What is the meaning of the final drive?
Gearing ratio and Diff ratio in combination with gearing or???

Click to expand...

Hi try this website for entering gear ratios (back axle means final drive)


http://www.race-technology.com/WebPage2/Other/Utilities/GearCalculations/GearCalculation.html

or I've attached an Excel spreadsheet which only needs you to adjust the red cells depending on tyres or gears that could be fitted. The final drive is the gear (it's the lump on the gearbox by the lefthand wheel/driveshaft which can just about be changed without removing the gearbox from the car) that divides the speed of the gearbox to the wheels.