Master Cylinder Upgrade due to Big Brake Kit

[AndreDarkBlueMk3]

Hi everyone, got a mk3 Ibiza 1.9tdi 90hp with no ABS, just ordered a set of V-Maxx 4Pot 330MM 4x100 BBK.

But I'm runing into a problem that my stock master cylinder, I think piston size is 22.2MM, might not be enough to pump these brakes.

Stock the car comes with 1 pot 256mm in front and drum in the rear, I already converted the rear brakes to a Sport/Cupra rear system.

I was wondering, what's the piston size of a Cupra master? Could I use the Cupra master cylinder or are they not compatible due o Cupra's having ABS??

A friend recomended me to use a 25.4MM master as is a common upgrade on the VW guys when they do the Porsche BBK's.
Found this two on EPYTEC.de but not sure if they fit the ibiza, I mean the first one fits mk2 mk3 golf so I would assume it fits. Anyone got feedback on it?

https://epytec.de/25.4 VW Golf GTI MK1 MK2 MK3 Corrado G60 VR6 1.8 T Porsche
or
https://epytec.de/25,4 VW T4 Bus Transporter Van whitout ABS Brake Brake Conversion

The main purpose of the car is a fast street car that can do some trackdays occasionally.

Thanks for the help!!

 

[jwrb]

The 25.4mm masters from either Sharan or T4 (pick depending on if you need m10 or m12 ports) work great in them.

They fit fine, only issues might be with clearance to the engine dependingon which you've got.

Cupra is 23mm, and it will help some; M12 ABS ports are easy to get by as you can get M10->M12 adapters to wind in (which seal at the bottom like any fitting)

For the M10 4 port items, you can use 2 ports and then install 2 bleed screws into the spare two. Doesn't much matter.

Either way I'd suggest the 25.4mm master, on the TDis theres plenty of room (RHD)

LHD I'm sure you'll have even more space.

If it's listed to fit a MK2/3, it'll usually fit the 6K/6K2 models