Technical 257 mm brake discs on panda 1.2 69HP 4x4

[koalar]

You will need to both swap the front and convert the rears to disc to work as intended

They share the same ABS pump with built in electronic distribution front to rear

And inform you instance company

 

[Bipedalmale]

You will need to both swap the front and convert the rears to disc to work as intended

They share the same ABS pump with built in electronic distribution front to rear

And inform you instance company

Why do you need to change the rear brakes? Surely the bigger front brakes will just take whatever pressure the current system puts their way...

My concern is that the pedal will have more travel due to the larger piston volume, hence the question about the master cylinder.

 

[koalar]

How I see it

You want to use all four corners to use there maximum, wheels to ground friction,

If you change the balance by increasing the torque applied only to the front wheels, when the fronts start to lock the amount of torque applied to the rears is no longer close to it's maximum

Increasing the stopping distances, especially in the wet or ice and adding extra weight if you only do the fronts


The further away from the ideal curve below the worse the braking will be

As you can see there is a significant advantage between curve D modern (EDB) and C old fashioned (proportioning valve)

 

[Bipedalmale]

Interesting, thankfully the Panda has no ESC (Electronic Stability Control) so it is likely to be more of a brake limiting system, as you say the bias will shift forwards with larger front brakes.

However, the actual increase in braking force will likely not be huge and the reason I am doing this to to reduce brake fade and grumble under hard use. Non-vented discs are generally poor, I suffered brake fade on my AXGT back in the day and don't want this to happen again.

Did the 100HP caliper carriers bolt straight to the existing 1.2 hubs? The bolt spacing is 100mm with 10mm holes on the 100HP carriers I have in front of me.

 

[koalar]

Some panda have ESC

The 100hp and cars with stability use a different knuckle


Whether the carriers fit without swapping them I don't know, I have never tried

I have driven the standard 1.2 panda hard

The standard brakes and cheap pads in good order will brake very heavy (Emergency stop)from 90+ mph down to 20 mph hairpins in the dry

 

[Bipedalmale]

Some panda have ESC

The 100hp and cars with stability use a different knuckle


Whether the carriers fit without swapping them I don't know, I have never tried

I have driven the standard 1.2 panda hard

The standard brakes and cheap pads in good order will brake very heavy (Emergency stop)from 90+ mph down to 20 mph hairpins in the dry

FRONT SUSPENSION - FIAT PANDA MY 2009 (2009-2010) | FIAT ePER - Online spare parts catalogue

eper.fiatforum.com

According to that link, the 1.2 and 1.4 share the same knuckle, unless I am missing something?

What did you change to fit the brakes to your car?

 

[koalar]

Vehicles without ESC bur ABS the vast majority,

Vs

Vehicles with ESC and including the 100hp

Both right side different parts numbers

 

[koalar]

What did you change to fit the brakes to your car?

I have run standard brakes on all three pandas I have owned

It's quite a light car 1255 kg there's not that much kenetic energy to loose to heat,

I did post the set up of the rally panda which was a Mish mash of Punto and silo parts I believe, you will have to read through my old posts on the A5 panda

But this is for better heat dissipation at the rear, hydraulic handbrake and so on, the fronts are then made to match


And that's not normal everyday driving

 

[The Panda Nut]

Just one other thought. 1st check the brakes are OK and if discs are rusting then a caliper change seems to be the only cure I can find. Then maybe try the Green stuff or whatever their alternative brake pads may be. They do claim to make differing grades of pad for different situations and driving conditions.