Issue after front brakes upgrade Bravo 2010

Hello my fellow Bravo owners

I am own a 2010 Bravo 120t dual-logic and after few modifications in engine bay, I have decided that its time for brakes upgrade.

With help of my friend, I have mounted Mito 155 calipers and discs. They are Brembo 4 pistons with 305mm disks.

After few test runs , I have noticed that braking power is decreased to compare with stock.

Is it temporary or I need to change more parts?



Air bleeding was done to brake system.

You probably need the matching brake master cylinder, the 4 pots will need greater fluid flow to work.

Re: Issue after front brakes upgrade Bravo 2010

Presumably the new calipers have either bigger pistons, or more of them, or both. To move bigger pistons, or more pistons, you need to push more fluid. This will require a larger bore master cylinder, or more pedal travel.

Fitting a larger bore master cylinder will then affect the rear brakes, as you are trying to push them more too. This can then cause issues with rear wheel lockup. Or it might be controlled by any load proportioning valves in the system.

The whole original system was designed for Fiat by a major brake manufacturer to work together. Changing one part upsets the whole balance, so lots of measurements and calculations may be needed. If the donor vehicle uses the same rear brakes as the Bravo, just its master cylinder may be all you need. But this may not work with your pedal arrangement.

A lot more homework is needed, bore sizes of master cylinders and rear brakes, pedal travel, etc. If Bravo uses rear drums and Mito discs, or vice-versa, that's a whole new can of worms.

The standard brakes are designed to stop the car from its top speed. Repeatedly. Getting there sooner does not increase the work to slow it down. Unless you've increased the top speed, and will use it, do you actually need better brakes?
If you brake harder, more stresses are put through the suspension and steering components, and therefore through the body of the car.
Can an increase in braking performance be achieved more easily with different pads? See EBC brakes for their range.

Just some thoughts. Hope they're helpful.

That's what i fear of from .

I will try to get entire unit with booster and tank. I hope that parts are compatible.:worship:
Bravo/Mito/Abarth mutation :devil:

Are you reaching the floor when braking?
FIY: the bravo 150 sport has smaller discs than the bravo 120.
Also a lot of the fiats use the same size brakes as the OEM of the Bravo including the Coupe 2.0t, Stilo Abarth, Bravo HGT (might be wrong on some ... but )

What i saw when i upgraded brakes on my previous bravo:
1.I needed to push the brakes harder ( not a bad thing on the Bravo as they are to sensible)
2. I had more control => less wheel lock-up/ABS.
3. much harder to lock the wheels even on snow on rain.

I would just say:
- bleed the system a few times
- drive the car for a week or so until you get used to it
- post back.


Were the calipers a straight swap?
Are the Mito wheels 4*98?
Pictures please!!!!

Pictures as requested.

And you are right, less abs locking.

Mito are 98*4 but with different offset.
Spacers are mandatory die to bigger calipers.

Do mito brembos bolt straight on to bravo hubs?

Bigger callipers will have only change break peddle travel, it will be noticeable from the start and won't change.
Also standard piston is about 2" brembos are about 1" inch each so really your not adding a huge load to the system.
Were they brand new?
Also the God awful rubber break lines are a very weak link on ours, you can feel them swell if you press the breaks, fit braided ones

gadge said:

Do mito brembos bolt straight on to bravo hubs?

Click to expand...

Yes

GrandeGuy, you mean this part?
http://www.ebay.de/itm/Wezmoto-Brai...arts_Vehicles_CarParts_SM&hash=item3f3f8de6c8

Brembos are 1'' * 4 pistons

awesome conversion

what discs have you used?
what caliper mounting adaptors did you use?

305mm disks from mito 155
4 pistons brembo calipers from mito 155
2 adapters from mito 155
4 brembo pads from mito 155

:bang:

so, how does the conversion feel now?
do you like it any better?
what didn't you like?

Re: Issue after front brakes upgrade Bravo 2010

Nomed said:

Hello my fellow Bravo owners

I am own a 2010 Bravo 120t dual-logic and after few modifications in engine bay, I have decided that its time for brakes upgrade.

With help of my friend, I have mounted Mito 155 calipers and discs. They are Brembo 4 pistons with 305mm disks.

After few test runs , I have noticed that braking power is decreased to compare with stock.

Is it temporary or I need to change more parts?



Air bleeding was done to brake system.

Click to expand...

Just a quick question, the break pads are new or used ones?Were they fitted to the same discs they were taken off from? Are you sure you did not mix any of the break pads?

Re: Issue after front brakes upgrade Bravo 2010

carlorff said:

Just a quick question, the break pads are new or used ones?Were they fitted to the same discs they were taken off from? Are you sure you did not mix any of the break pads?

Click to expand...

The picture shows a shiny new disc, and shiny new caliper, so I'd hazard a guess at new pads as well. Also shows greasy fingermarks on the disc.

:devil:


All used.

Disks were tooled to remove inperfections.

Pads could be mixed. 3 out of 4 could be mixed ...


Actually, my braking start to improve:worship:

If you still feel it's not doing the job after a few weeks of driving. i would suggest to check if the Alfa Mito's brake servo drum is any bigger.
A bigger servo drum will make it that less force will be needed to get good brake force.

That is why I asked, as the break pads if they were used or if the discs were renewed take some time to wear in and fit perfectly...hance they do not stop the car 100% usually it could take up to 500km or more.

for me I would have put new discs and pads on from the start at least you know theres nothing wrong with the ie contaminated with oil etc