What are the piston diameters for both the front and rear calipers? What is the piston size and bias in the master cylinder?

 

If nobody knows off the top of their head can somebody let me know where I can get technical drawings for the braking system? Are they online anywhere? Would they be in the Bentley manual? Thanks!

 

Anybody? I know we have some Jag techs on here...

 

What year do you have? I have an 02 x-type 2.5. I know the last time I put shoes on mine the diameter of the piston was roughtly 1 to at the most 1 and half. If I get a chance I'll look in my chilton book and see if they have any spec. in there for the pistons. The tool I used to turn the pistons back to put the shoes on with, I don't think it was any bigger than 1 or maybe 1& 1/4 in diameter.

 

Thanks! And let me knownif your chiltons has the specs as I need a good manual for my car.

 

Sorry it took me so long to get back to you. I was away for the weekend down at the campground. I checked the chilton manual, there was a lot of specifications and a lot of info on the Jaguar in the manual. There was a lot of brake info but I could not fine anything on the dia size of the caliper size, there was 24 pages on brakes and calipers info. I think the Chilton manuals have always covered just about everything you need for repairs. It is the book that I get after I buy a new used car. Sorry I couldn't get you the info you needed.

 

chknhwk, the front piston is 57mm (2.24") and the rear piston is 38mm (1.49"). As for brake biasing, the JTIS says nothing about it other than the master cylinder makes sure that equal pressure is applied front and rear. With that being said, based on the size of pistons used, you are looking at roughly a 60/40 split between braking effort front to rear. This is pretty standard with most vehicles. Now, keep in mind that with using ABS in our vehicles, as a tire looses traction, the braking system is going to reduce the braking effort by that wheel, shifting the balance of the braking around. So, the amount of braking effort you have is all dependent on road condition and the condition of the tires. So, if you have more worn tires up front, you will find that your rear braking system is going to work a little bit harder since the front tires are going to tend to slide a bit more than the rears.

 

Thermo, thanks SO much for the sizes! It's going to make it a little easier when shopping for my custom setup. Thanks a bunch!
Now, any idea on the Brembo setups for the STR?

 

chknhwk, I think your bigger issue is going to be finding the proper mount to go from the spindles to the calipers. Unless you are sticking with the factory diameter rotors, you will need a different mount too. Granted, going with a bigger rotor is going to be giving you the biggest gain in stopping force unless you start looking at 4/6 piston calipers.

 

Already taking all of that into consideration. Thanks for looking out, though.