BOOOOOOOOOOST More BOOOOOOOST

[fraguzz]

yah.. well it could go with even taller gearing in my car.. it runs out 5gear.. havent pushed it to the 100% limit but it runs past 200.. on the clock.. and would do well with a higher gear for 140km/t driving.

Took these ratios from here...

Multi-jet
3.909
2.158
1.345
0.974
0.766


C514 (6 speed) off the 500 1.4 16V - imagine it's the same for the 100HP
3.545
2.158
1.480
1.121
0.921
0.766

Matches up with a Euro spec sheet on theFiatUSA500

From memory the final drive is the same for both.

The gear ratios in the 5 speed for the 1.2 are different and are noticeably lower in the higher gears. The 5th gear on the MJ is a tall one and the same as the 6 speed.

Get the impression that the C514 5 speed might be a more resilent gearbox than the 6 speed variant which is also used on the 100HP (there have been reports of failures on the AF on the MiTo 95bhp and there is possibly one or 2 on the FF on the 100HP). When Fiat beefed up the C514 it was on the 5 speed. There was initially a 6 speed in the MiTo MJ that had no DPF but it was dropped within a matter of months. Have no information on it.

5 speed is all that you need on a small turbo charged car. The 6 speed is more of a close ratio gearbox for the petrol which needs to rev.

 

[loveshandbags]

yah.. well it could go with even taller gearing in my car.. it runs out 5gear.. havent pushed it to the 100% limit but it runs past 200.. on the clock.. and would do well with a higher gear for 140km/t driving.

Depending on the final gear ratio on the MJ 5th gear it may not be tall enough if you've 'boosted' the engine.

The final ratio for the 1.4 16V is 4.07 which came from here but you will need check elsewhere if it's the same. Here's a graph that shows that at 4,000 rpm equates to 90mph which originally came from here.

You consider changing the size of your tyres to 'taller' ones. Some 100HP have changed their 195/45s to 195/50s on the 15s. 3.6% in diameter and supposedly gave a more comfortable ride. Unusure of the implications on your insurance where you're based.

 

[scoop987]

Do you have anything to back that up ?

My understanding is that the M32 gearbox was developed between Fiat/GM when they were in partnership. This was done alongside the MJ engines e.g. the Saab 9-3, Astra & the Vectra use the same 1.9 8v/16v engines. Although given the some of the 'comments' on the M32 gearbox it's now referred to a GM gearbox.

If you look at this 'out-of-date' pdf (on p136 of 210) the M32 gearbox is listed as being used by GP, Croma II, 159 & Brera. Going through the Renault models none of them use the M32 gearbox. So if it's a Renault box why aren't there any Renault cars using the gearbox ?

Looking at the spec sheet with Opel on the M32 the identifier either mentions Opel or Fiat. No mention of Renault.

Also the M32 in my current car feels nothing like a Renault gearbox but that's comparing it to gearboxs in my folks cars 'of old'. They had a Renault 18 and my father-in-law had a rubbish automatic in a Renault 30. I'm hoping that the M32 in the T-jet and the OH's MJ lasts.

Ok, looks like the person that told me was telling a load of fibs. Thanks for the reads