CE LANCER FRONT BRAKE UPGRADE

Johnzy

Johnzy

Member
So I fitted Mini Cooper front brake rotors and TS 4 cylinder ABS front brake caliper with Project mu brake pads. Ive bleed the brake as i have done many times. I road tested and bedded the pads and rotors in like normal.

So the issue I'm having is the brake pedal travel is much longer than it was previously making it almost impossible to heel toe. Once the brakes start to grab it feels great but there is not much travel between the initial bite and the brakes locking up.

I have read on some threads that fitting a 1" brake master cylinder will fix or help with brake pedal feel but no one decribed what there problem was or what it fixes.

Info from anyone that has fitted the bigger brake master cylinder would be great.
 
Personally havent fitted the larger master cyclinder to a CE, but the basics are that by upgrading the calipers, you’ve increased the size of the slave cylinders in the system. So for the same force and travel on your brake pedal, you have less force and travel than on stock brakes. To compensate, youre traveling further (possibly using the same or more force too - more things at play).

By upping the size of the master cylinder, you reduce the travel required of your brake pedal. This will increase the force required by your foot to take the same travel. Put this together, youll be moving your foot a bit less, pushing a tad harder, but nothing extreme. Roughly about the same force from your foot, shorter pedal travel gives the same brake force as before.

If you find the force required is too much, you can upgrade the brake booster too. Brake booster will only effect the force you require to put into the brakes and by upping the size, you “desensitize” the pedal.
 
Thanks as I was reading your comment I realized because I have 2 pistons in the caliper there is more surface area so I will need to move more fluid hence the pedal traveling further
 
Johnzy said:
Thanks as I was reading your comment I realized because I have 2 pistons in the caliper there is more surface area so I will need to move more fluid hence the pedal traveling further
Click to expand...

Spot on, and as far as the brakes being quick to lock up I would probably put that down to the new pads and discs and their higher friction qualities
 
Thanks for your help I was scratching my head for a couple of hours before I posted this. I just couldn't put it together in my head
 
Are you sure you don't have air in the system?

But yes larger caliper pistons will require more pedal movement.

I have a 15/16" unit from an FTO which uses twin piston calipers. If you're interested in it let me know
 
I am unsure how those will affect pedal feel (if at all).

You could do the swap then upgrade the BMC to see what the difference is but that means you're forced to do another brake flush.

Keep in mind when swapping BMC you need to bench bleed it
 
It might change the pedal feel for the same reason with the front brakes. If the piston surface area is more or less that the wheel cylinders surface area then I would believe it might change it.
 
I have 276mm fronts, 260mm rear discs, HEL braided brake lines, and the oem master and booster, and that still it makes a hell of a difference in braking.

If i press the pedal all the to the floor, it'll lock up the wheels but i rarely need over 1/2 the pedal travel in almost all braking situations. I've had a larger MC in the past, but as its been mentioned above it only made the pedal act like the standard one and apply more force earlier.
 
It would be the size of the piston/number of pistons that will effect pedal travel.

I'm going to get a BMC from U Pull It off a ch 2.4 they are bigger I'm just not sure how much bigger.
 
CH won’t bolt in like an FTO or evo MC.

It has the clutch MC attatched to it and also uses a different style of fitting to attatch the hard lines. Can be done, but the cost of reflaring the pipes will make it cheaper to just go fto or evo

Edit: reference added
 
I'm going to have a look at U Pull It tonight it's on my way home. I can get a flaring kit easy so that is not a big problem.

I have only seen one fto at U Pull It and that had all the brakes and suspension taken so not very common here in Adelaide.
 
I found the stock MC/booster felt better to me, I had more pedal movement so more accuracy in how hard/soft I was braking at any given time rather than having the pedal be firm at the touch all the time
 
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