Board logo

Brake Bias Valve
fesycresy - 15/7/05 at 12:44 PM

Would it be possible to get a Wilwood (screw top) type bias valve through the SVA ?

Cheers, Lyn.

mookaloid - 15/7/05 at 12:45 PM

I think so - providing it can't be adjusted from the drivers seat

Cheers

Mark

David Jenkins - 15/7/05 at 12:46 PM

You can any form of bias device you like - but they'll test the brakes with the control set to both ends of the range. The chances of passing the test at both settings are fairly slim...

David

fesycresy - 15/7/05 at 12:51 PM

What's the chance of a pass with no bias, as I'd like to fit a valve at some point ?

It's a BEC (R1) with standard sierra rear calipers and discs. Wilwoods on the front.

chrisf - 15/7/05 at 12:57 PM

Could you not put the valve in the rear and remove the knob? Then, it's not really adjustable. Just a thought.

--Chris

David Jenkins - 15/7/05 at 01:00 PM

Just remember that people with mechanical bias systems have had to either weld up the adjustment, or put a roll-pin through it, to get through the test!

If it's reasonably easy to adjust, then they'll test the whole range of settings.

This is actually a sensible rule, IMHO. The car could get horribly dangerous if it was possible to easily set the bias to a badly wrong setup.

David

David Jenkins - 15/7/05 at 01:07 PM

quote:
Originally posted by David Jenkins
The car could get horribly dangerous if it was possible to easily set the bias to a badly wrong setup.


...re-arrange these words into a well-known phrase or saying... it's well into Friday afternoon, and my grammar control has switched into gibberish mode!

Try again...

If the bias can be set to a position that made emergency braking unsafe then the car becomes dangerous.

There... that's a bit better... soon be home-time.

David

mookaloid - 15/7/05 at 02:11 PM

My Indy passed SVA with no bias valve and with discs all round

[Edited on 15/7/05 by mookaloid]

Surrey Dave - 15/7/05 at 03:08 PM

I have no bias valve, and if anything I could do with more rear brakes not less, this is echoed by others I have talked to

Hellfire - 15/7/05 at 04:18 PM

Ours passed easily with no bias valve, as have numerous other BEC's.

shortie - 15/7/05 at 06:26 PM

I have got a bias valve in mine but for SVA it is fully open as the sierra master cylinder sorts out the rest.

It is also covered in the tunnel and not adjustable by the driver without removing the top panel which means undoing loads of screws (and it can't be seen) so this should be fine for SVA.

Rich.

fesycresy - 16/7/05 at 06:32 AM

Thanks all,

I'll leave out the bias valve for the time being and if I pass / think I need one, I'll worry about it later.

SeaBass - 16/7/05 at 10:08 AM

quote:
Originally posted by Surrey Dave
I have no bias valve, and if anything I could do with more rear brakes not less, this is echoed by others I have talked to


Echo that Dave. Our book locost with a 1300 live axle has very little braking to the rear.