finlay
|
| posted on 10/7/08 at 02:23 PM |
|
|
roll pin the brake bias bar ???
hello all
i ve just read coredevelopements SVA thread, hard luck mate, and read this
"last but not least the main one which prevented the others being sorted on site.
I FORGOT TO DRILL AND PIN THE BLOODY BIAS BAR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! "
can some one explain what this is and pics would be a big help
ive got my SVA on the 28/7/08 and this is the first time i ve heard of this
cheers
|
|
|
|
|
Mr Whippy
|
| posted on 10/7/08 at 02:35 PM |
|
|
you simply have to pin the threaded rod so that it cannot be turned while driving the car, like many folk can drive while their head is in the
footwell and adjusting the pedals 
[Edited on 10/7/08 by Mr Whippy]
Fame is when your old car is plastered all over the internet
|
|
|
Mix
|
| posted on 10/7/08 at 04:38 PM |
|
|
Hi
If you're using a bias bar set up then the SVA requires that at both extremes of bar adjustment the rear wheels lock before the fronts when
braking. The limits of the bar adjustment must be 'permanantly' locked and in the eyes of the SVA this does not normally mean using split
pins, however roll pins are considered acceptable. I don't have any pictures of roll pins to hand but a quick google will show you what they
are. Easy enough to fit and cheap.
Regards Mick
|
|
|
Mix
|
| posted on 10/7/08 at 04:42 PM |
|
|
Hi
Also meant to make the point that as I see the SVA regs it is perfectly acceptable to have adjustable brake bias as long as it is not possible to
adjust whilst driving.
Regards Mick
|
|
|
finlay
|
| posted on 10/7/08 at 05:02 PM |
|
|
hi
thanks for the replys
it was the first time i had come across this needing done, just aswell i stumbled accross it
so basically a pin either side of the peddle drilled and fitted in to the bias bar
spot on
cheers
|
|
|
Mix
|
| posted on 10/7/08 at 05:15 PM |
|
|
Hi
No, you don't want to drill the bar in the loaded area and weaken it. You want to drill through the nuts on the outside of the master cylinder
clevises and pin the nuts to the bar.
Regards Mick
|
|
|
Mix
|
| posted on 10/7/08 at 05:24 PM |
|
|
Hi
See here, http://www.wilwood.com/Products/005-PedalAssemblies/Pages/techtip/pedaltech.asp
You will need a nut on both sides of the bias bar, (the pictures show only one), and it is these nuts that need to be roll pinned or welded to the
bar.
Regards Mick
|
|
|
Deckman001
|
| posted on 10/7/08 at 06:20 PM |
|
|
Am I right in thinking then you need to set up the brakes before you get to the sva test so you can't move the bar once drilled and
'set' ?
Jason
|
|
|
stuart_g
|
| posted on 10/7/08 at 06:23 PM |
|
|
Hi Finlay,
Here is a pic of mine, done at the SVA testing station after the test. The examiner let me do it at the end after he had checked it was all adjusted
right.
I had pre drilled the nuts so I just had to drill the bar and put roll pins in.
 
Rescued attachment P1010105.JPG
|
|
|
Deckman001
|
| posted on 10/7/08 at 06:34 PM |
|
|
Pre drilled nuts, darn good idea !! no wonder my car has taken so long !!
Jason
|
|
|
jollygreengiant
|
| posted on 10/7/08 at 06:48 PM |
|
|
quote:
Originally posted by Mix
Hi
If you're using a bias bar set up then the SVA requires that at both extremes of bar adjustment the rear wheels lock before the fronts when
braking.
Regards Mick
I think you will find that this is wrong and the fronts should lock before the rears.
Stands ready to get flamed on this.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
|
|
|
Davey D
|
| posted on 10/7/08 at 07:36 PM |
|
|
is it acceptable to drill a hole, through the ends of the bar, and then fit a spacer tube to take up the space between?
i have modified one of the pics from the wilwood site
so as you can see.. nuts pinned at the far end, and the red bit is a spacer tube in between...
is this allowed? this way you have the bar, and nuts pre drilled, all you have to do is take some tube, then cut it to length, slide it in place, and
then fasten on the nut, and push in the roll pin... no need to struggle in the footwell trying to drill any holes  Image deleted by owner
|
|
|
Dave Ashurst
|
| posted on 10/7/08 at 07:41 PM |
|
|
quote:
Originally posted by jollygreengiant
quote:
Originally posted by Mix
Hi
If you're using a bias bar set up then the SVA requires that at both extremes of bar adjustment the rear wheels lock before the fronts when
braking.
Regards Mick
I think you will find that this is wrong and the fronts should lock before the rears.
Stands ready to get flamed on this.
You're quite right, Jolly Green one.
Fronts must lock up first in all cases to be road legal by the SVA test.
It's considered the safe way. Rears locking first can start a spin.
I failed my SVA on that 1st time round.
D
|
|
|
stuart_g
|
| posted on 10/7/08 at 10:49 PM |
|
|
Davey, Yes this would be ok. It is better to have a spacer that way the clevises would be able to move without being fouled by the nut.
I made my spacers out of black nylon you can see them in the photo. I would have liked a tubular spacer but couldn't find anything with the
correct internal and external diameters.
[Edited on 10/7/08 by stuart_g]
|
|
|
finlay
|
| posted on 11/7/08 at 10:43 AM |
|
|
thanks for that Stuart
what size and thread are the Bias bar nuts ?
[Edited on 11/7/08 by finlay]
|
|
|
finlay
|
| posted on 11/7/08 at 12:31 PM |
|
|
Thanks Mick for the willwood link
|
|
|
Mix
|
| posted on 13/7/08 at 04:06 PM |
|
|
Hi
Cheers JGJ and Dave for correcting my error, what was I drinking at the time? Sorry for any confusion caused..........walks away in shame.
Regards Mick
|
|
|
coozer
|
| posted on 15/7/08 at 03:32 PM |
|
|
quote:
Originally posted by finlay
thanks for that Stuart
what size and thread are the Bias bar nuts ?
7/16th UNF
1972 V8 Jago
1980 Z750
|
|
|
twybrow
|
| posted on 20/7/08 at 11:11 PM |
|
|
Aren't there thes wonderful things called washers? I'm fairly sure they do 'em in 7/16" and you just adjust how many you use
rather than cutting tube.... Or am I missing something?
|
|
|
