We all know that the brakes on the X100 had three iterations of disk and pads and two servos. By chance I bumped into an electric vacuum pump at $100 that produced 30in HG of vacuum. so I investigated the normal vacuum available in the inlet manifold and it seems 18-20 in Hg is normal. If that is the case then the pump would give a 50% boost to the brake system . Anybody measured the inlet vacuum on an XK8 ?

Any comments welcome from those who have used electric vacuum pumps which now seem to be common on Diesel vehicles.

PS Since posting discovered my Scangauge reads Manifold Absolute pressure so will take a look at that ...

 

You do realize that more boost will not improve actual performance, as measured by stopping distance ? It only may make the pedal effort less, which is already pretty low.

if you are wanting to actually improve (reduce) stopping distance, then a low cost solution is to put on a set of brake pads with a better friction coefficient.

My switch to ebc redstuff pads from the OEM pads was a substantial improvement in stopping distance. Not a surprise, as I’ve been using those pads on many cars previous to my XKR ownership, including putting them on many customer cars during the restoration process.

The redstuff compound is easy on rotors also. I have approximately 50,000 miles on my current rotors and pads with no apparent wear on the rotors and about 25% of pad life remaining.

Z

 

EBC red stuff I will investigate that . Thanks+