Master Cylinders.............what Happens If I Fit A 25.4 Mm

[ftoomsh 5 1 Cars]

right so im on the hunt for a master cylinder for my 205 mi16 that has gti6 front discs calipers and standard 1.9 rear discs and calipers.

 

i know everyone fits the gti6 / 406 master cylinders 23.8mm bore.

 

i was wondering what would happen if i went to a 25.4mm bore??

 

 

[Tom Fenton 1,540]

Less travel, harder pedal

[welshpug 1,655]

Lower clamping force on the caliper.

[ftoomsh 5 1 Cars]

So i dont really want to be going bigger than the 23.8mm cylinder then??

[stu8v 68 1 Cars]

Lower clamping force on the caliper.

For the same pedal pressure.

[welshpug 1,655]

yup, I do recall the one of the citroen sport rally cars ran a 25.4mm MC with the very same brake calipers possibly.

 

IIRC a VW transporter unit is directly compatible, the citroen one was used with an adapter plate IIRC

Edited September 12, 2014 by welshpug

[ftoomsh 5 1 Cars]

Thats exactly what was thinking!!

[ftoomsh 5 1 Cars]

So does anyone have a 25.4mm master with gti6 calipers fitted?

How does it feel?

Or should i just stick with a 23.8mm??

[wicked 103 3 Cars]

My mate has... He has one from an Audi, intended for the upgrade later on.

It's way too big for gti6 calipers; hardly any travel in the pedal, so the booster doesn't do anything. Gives an unsafe feeling, until you press it very hard.

[allanallen 528 2 Cars]

Booster?

[jackherer 543]

Booster = Servo

[ftoomsh 5 1 Cars]

Well i guess that answers my question. Thanks guys

[wicked 103 3 Cars]

Servo indeed... Couldn't find the right word...

[ftoomsh 5 1 Cars]

I knew what you meant! Lol

[jackherer 543]

I thought brake booster was the American English term but I just looked on Servicebox and they use the terms servo, booster and amplifier all on one screen!