Stock Front Brakes On Rear

[bogan393]

Hey, I've just found a nice set of 330mm rotors with 8 piston calipers that will be going onto my t in the next month or so, and I was wondering the the standard 2 pison front brakes can be easily fitted to the rear for a bit of extra stopping power? Any help would be great.

Edited 02/12/06 08:46 AM by bogan393

[F6 RAPID]

Anything can be done.

Just open your wallet and throw money.............

[bogan393]

Yea I know that, but what I mean is as a alternative to buying some aftermarket bigger rear brakes.

[BAturb]

with 8 piston fronts you should balance the rear with 4 piston calipers

[Muzza]

Hey, I've just found a nice set of 330mm rotors with 8 piston calipers that will be going onto my t in the next month or so, and I was wondering the the standard 2 pison front brakes can be easily fitted to the rear for a bit of extra stopping power? Any help would be great.

←

Hi Daniel,

Make sure the 8 points are ADR aproved for street use.

I agree you should even up your braking with at least a 4-6 point rear.

Muzza.

[bushuteF6]

As BAturb said - you'll need to balance front and rear. Your master cylinder will also have been designed to provide a certain amount of pressure by volume for the current setup. Coming from a full rebuild on a Lotus race car I can provide the following tips:

1. Master cyl valving/bore will provide a set volume "push" for a given pedal travel.

2. Braking force is directly depenedent cylinder bore/pistion diameter. Bigger pistons will need more brake fluid volume to push them the same distance.

3. More pistons does not necessarily equate to more brake force.

4. Calculate your combined pistion area. If its more than standard your brake pedal will travel further. This is NOT a bad thing it just means you have to push further (but less effort) to compress the brake fluid. Unless of course your master cyl is way below the volume reqd for the new pistion area.

5. Calculate your current front to rear ratio I.e. pistion area front / pistion area rear. Do the same for the new setup and if they are WAY different you'll need a bias valve. E.g. std = 70% / 30% and new = 55% / 45% then you'll need a bias.

As an aside, always be careful with doing this on ABS systems. Changing front rear bias could have a dramatic effect.

Cheers all - this is my first post so apols for the rambling.

[RHR]

Too hard basket anyone??

[bogan393]

Wel I never thought it was going to be so involved lol, my bugdet doesnt really stretch out to do the rears aswell, especially if I have to buy 4 or 6 pot rears, I might have to put it off for a fair while by the looks of it.

[bogan393]

So is it deffinately not possible to put these brakes 8 piston brakes on without upgrading the rears? if not what are my other options that arnt too pricey, preferably under $4000, other then the pbrs, I havnt heard good things about that upgrade.

[BAturb]

I have just upgraded to the PBR 330mm front and rears and think highly of them