xrgt

standard booster and master cyl (booster on passenger side, master on drivers side)

XA V8 calipers DBA discs up front
XY HO drums rear

she has a very hard pedal, does lock up if pressed hard enough...

How can I get that later series XF feel ?

oze50

how about this.

transplant an XF master cyl & booster to ur car.
the xf master cylinder is proberly has a larger diamater piston.
u will have to make shure it has the valve in it for having drum brakes.
cant see y i could not be done, ud deffently get a better pedel

xd351ute

I take it you still have the single system master cylinder? The XA front calipers and XY rear drums have larger cylinder diameters than the standard XR disc/drum setup, hence more peddle effort is needed to stop the car. A larger diameter master cylinder is needed, and a later model larger one requires a fair bit of work to make it fit. I was running a simular setup to yours on my XR and I had the "low pedal feature" XR master cylinder which has a slightly larger diameter than standard. There was also 2 types of booster on the XR's, vh40 and vh44. One is bigger than the other (can,t remember sorry) which will give more boost assist when braking. This did help a bit but my brake peddle still needed a good hard push to brake. In saying this the XR GT had both of these so you should have them anyway.
I have seen an XW booster and master cylinder fitted to an XR. The booster mounting plate and that part of the firewall had been cut and welded into the XR. A bit of work though. I have also seen the duel system XT master cylinder fitted to XR's, but not sure if this would help.

xrgt

Got some great advice from hoppers stoppers in VIC and they say that my master cyl has a 1.25inch bore wich is too big for my brakes... They say I can most probably have the bore resleeved to 1inch xw and on... this will make a big difference. They also have an aftermarket master cyl from Jap...but not a straight up fit... need few mods...

bcr01

[ hence more peddle effort is needed to stop the car. A larger diameter master cylinder is needed,

You will actully need a smaller diamiter master cylinder to increase presure. Going larger will decrease the amount the pedal moves and the pressure it will create.

XpCoupe

Hoppers install the Jap master cyclinder onto my XP and it works great. I am only boosting the fronts rear are non boosted. I install the Hoppers twin spot brakes on the front.

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Weekender: Xp Coupe, 302 Windors, C4, Lime green
Currently looking for an 9 inch disc rear end.

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