159 2.4 jtdm 210 remap questions

First of all hello everyone!

I dont know if this where I should post this or on the tuning or engine section but I have some questions about a possible remap.

First question is about the gearbox, which I've heard is rated to 400nm that being the reason they limited the torque on the 210hp upgrade to 400nm. How does the gearbox copes with the increased torque (found values from modest 30nm to almost 100nm increases from various companies)?

Second question would be about the performance gain to 0-60mph (0-100kmh) after such a remap. Official figures give 8.4s, but how low can the car go after a remap?

Thank you.

Moved to Tuning Lounge

in the old days an f18 box would habdle 180lb/ft torque, it was always the f number multiplied by 10 to get the rating in lb/ft.
I do not know if VX changed the rating from lb/ft to Nm, my guess would be its still lb/ft.
My old 140 is tuned to over 400Nm at the fly, it was 313lb/ft at the wheels, with that in mind I would say the F40 is in lb/ft rather than Nm.

Unfortunately that isn't the case here. The M40MAN gearbox is rated in nm

Here is the FPT site stating that: Fiat Powertrain Technologies - M40MAN Gearbox

I thought the 2.4 159's used the Vauxhall F40 gearbox, or is that what is listed in the link?

In the link there is a FPT gearbox and it's strange that only the diesel would use a GM gearbox when all the other 159/brera/spider use FPT gearboxes.

Even more I remember that only the 159 uses the platform developed by GM and Fiat and the FPT gearbox looks exactly like the one on the EPER catalogue as the GM one doesn't.

Anyway, even if GM F40 is used, F40 is still rated at 400nm (295lb-ft).

500NM should be safe in my opinion....

But about 450NM for Q4 system!

talk to the tuners, Celtictuning.co.uk, angeltuning.co.uk and red dot.

Is that the same gearbox that's fitted to the 2.4JTDm 175 in the 156 as the 159 or is a different one again?!

Cheers,

Mark

Can't comment really on gearboxes, instead have gearbox and Q4 concerns myself because that is what I have in mind. Any users experienced already with a remap to an area of 240-250bhp and some transmission problems because of that?

In my praticular case I would have clutch, gearbox and Q4 central differential as my concerns. Any ideas how bad this can be with increased torque? Is it possible to adjust remap so to have maximum power of say 250bhp but torque limited to slightly less than you nowmally get - say 450Nm?

the f40 is in fact 400 lb/ft.

That gives 540Nm, so there is no concern about the gearbox, remap does not reach these values, I think it barely goes up to 480Nm or so.

WHat about the Q4 central differential is there any point of concern?

I am almost 100% sure that the so called "F40" is in fact this gearbox: Fiat Powertrain Technologies - Automotive applications
400nm that is

Originally Posted by supercute

I am almost 100% sure that the so called "F40" is in fact this gearbox: Fiat Powertrain Technologies - Automotive applications
400nm that is

Back to square one then aren't we?

If that gearbox is really rated at 400Nm and we're talking about the right one then the only hope is the extra load tolerance it must have. How much can it be, any idea? Typical tolerances in electronics are 20-30% on components such as capacitors even more in case of resistor's wattage (50%). I don't think it goes as high in complex mechanics but it should be safe to assume at least 20%...

OK, go on worst case, my old 10v 2.4 jtd, what rating is the box on that? 320nm?
the car has just over 400nm at the wheels, so add a bit more for at the fly figure.
Gearbox still Ok.
After 168k.

Worst case, it is 400nm, if mine at 320nm is handling 400+ (440 after losses?) then I would just enjoy the power you can unleash.

All I would say is, get the torque bought in higher up the rev band rather than spiking at 2-2200rpm, too much too low down will kill it off quicker.