SR3 brake bias setting
Discussion
Having had a few brake issues we have now replaced fluid, front discs and fitted new pads all round. Is there a starting point for the in cockpit brake bias adjuster ? I intend to play with the bias when next on track but 
wondered if there was a staring point and what the ideal dry setting would be. Thanks
wondered if there was a staring point and what the ideal dry setting would be. Thanks Edited by silv on Thursday 9th July 14:31
Hi Vic
Good to see you back on the Forum.
Perhaps as a reasonable starting point, Owners Manual says this >
"Brake Bias Settings
Set central to two turns towards front (clockwise on the dash adjuster). Further adjustment can be made to suit individual circuits and tyre configurations. Adjust bias to the rear in wet conditions."
If you haven't already done so, whip the front off and check that it's actually functioning. At Dony last Thursday, a very helpful, knowledgable and race-winning soul told me that a lot don't; due to lack of lubrication as part of periodic maintenance. Also that adjustment should only be made 'off the brakes'. Apparently, if you want to get a direct rough feel about how the bias is set, quicklift one side of the car so both wheels off the ground, get a helper to hold a reasonable pressure on pedal and use a torque wrench to turn the wheels, obviously looking for / judging greater resistance off the front.
Good to see you back on the Forum.
Perhaps as a reasonable starting point, Owners Manual says this >
"Brake Bias Settings
Set central to two turns towards front (clockwise on the dash adjuster). Further adjustment can be made to suit individual circuits and tyre configurations. Adjust bias to the rear in wet conditions."
If you haven't already done so, whip the front off and check that it's actually functioning. At Dony last Thursday, a very helpful, knowledgable and race-winning soul told me that a lot don't; due to lack of lubrication as part of periodic maintenance. Also that adjustment should only be made 'off the brakes'. Apparently, if you want to get a direct rough feel about how the bias is set, quicklift one side of the car so both wheels off the ground, get a helper to hold a reasonable pressure on pedal and use a torque wrench to turn the wheels, obviously looking for / judging greater resistance off the front.
silv said:
Hi Rob, 
a stupid question !! How do I find the middle ?
err rotate the adjuster one way untill you stop..... then count the rotations the other way until you stop. what ever this number is, rotate it now the other way 1/2 the number of turns you counted! a stupid question !! How do I find the middle ?hope that helps.
Dario
We have brake bias issues in our SR3. It tends to adjust itself towards the front. We screw both side in, then let them out equally. We thought the brake bias bar was broken as it seems to rock, or move a lot through it's mount. We are now told that this is correct, but it doesn't feel right. A couple of lock nuts seems to have resolved it, but not the best design I have seen!
lock nuts? It's meant to pivot...
This might help
http://www.performancefriction.com/pages/Race_tech...
Simon
This might help
http://www.performancefriction.com/pages/Race_tech...
Simon
No, I appreciate that, what happens on ours is that the adjusting nuts don't stay in place with the result that bias moves to the front.
We have to have a lock nut outside the adjuster to keep it set as it should be (which is what I meant to say previously).
The point of the OP is that the bar itself, where it passes through the point of pivot seems very slack in terms of it's location and we suspect is prone to vibration. As if ANYTHING in an SR3 isn't!!!
Not had a chance to look at another SR3 since we noticed this, but we will!
We have to have a lock nut outside the adjuster to keep it set as it should be (which is what I meant to say previously).
The point of the OP is that the bar itself, where it passes through the point of pivot seems very slack in terms of it's location and we suspect is prone to vibration. As if ANYTHING in an SR3 isn't!!!
Not had a chance to look at another SR3 since we noticed this, but we will!
That sounds odd, the shaft should be linked to the bias adjuster on the dash and this should stop it turning?
Simon
www.tillingmotorsport.com
Simon
www.tillingmotorsport.com
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