Rear drums

[severous01]

i hope the kit comes with a proportioning valve...if not, get any prop valve off a yota with discs...or one of the xb/xa's

[auxmike]

Originally Posted by severous01

i hope the kit comes with a proportioning valve...if not, get any prop valve off a yota with discs...or one of the xb/xa's

Don't all cars have the valve regardless??

[xbgod]

Depending on your application that will differ.

A proportioning valve will allow you to adust pressure on that line only. It will not divert the pressure from the front to rear or vise-versa. So be mindfull if you put one on. It works on that line only to adust pressure.

A residual valve is what is usually on a drum set-up. This allows the line to hold pressure on the springs for the drums. these usually come in 2lb or 10lb valves.

Most master cylinders are a 70/30 split. This means 70% goes to the front and 30 to the rear. This would be typical of a stock set-up. You can go to an aftermarket one for racing which can be a 60/40 split or even to a 50/50 split. Wilwood Engineering sells these.

However for what your doing none of this should be necsessary. Unless you put some huge 6 piston caliper in the rear.

I converted my drum to disc in my XB and left the M/C and all stock valving alone. I have no issues. No brake fade, no spongey pedal. All works fine.

If you need to get more technical PM me. I've done drum to disc conversions for racing for 11 years.

XBG

[Evangelion335]

Thanks guys, i dont want to get rims and then have nasty drums lurking in the back.