Dave J
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| posted on 21/6/04 at 10:21 AM |
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Bias bar test
Hi all,
I'm not at all sure about what is tested during the sva on the bias bar. I thought the bar had to be pinned with the bias set more to the front
brakes, however I read on the forum that the bias bar was tested at it's two extremes, presumably to make sure there's enough stopping
power on the rears.
This being the case, there's no way you'd be able to pin the bar prior to the test, so instant fail point.
I could really do with some help on this point as I've four pots on the front and although I can set sufficient bias front to rear, I'm
not convinced I would get enough on the rears to have them come on before the fronts sufficiently for the sva man.
Sorry if this comes over a bit gibberish, and I've got completely the wrong end of the stick,but theres a few things on mah build thats
stressing me out at the moment.
Many thanks
Dave.
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David Jenkins
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| posted on 21/6/04 at 10:26 AM |
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Don't worry Dave, all us builders have been there at some time or other! 
You've got 2 issues mixed up, I think. If the bias system is adjustable, they'll test it at both extremes. If it's not adjustable
(i.e. got a roll pin locking it) then they'll only test it as it is.
As for what comes on first, it's the fronts that should lock before the rears - the official position is that unexpected understeer is less
likely to kill you than being surprised by the rear-end overtaking the front!
David
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Dave J
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| posted on 21/6/04 at 11:10 AM |
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Thanks David. So as long as I get the bias correct and then roll pin the nuts I should be ok?. I intend to get he car MOT'd before
sva.......just in case.
The further I get into the build and the closer SVA comes, the more paranoid I'm getting........ooh it's a worry!
All the best
Dave.
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Lightning
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| posted on 22/6/04 at 10:53 AM |
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MY examiner tested the brake Bias bar at both extremes. That is to say, the bar could not be wound through any further due to the tread running out on
the centre part where the fulcrum joint is.
Both passed and therefore the theory is that wherever the bar is adjusted too is within the required limits.
If this were not the cae and it failed on the lower limit it would then have to adjusted till it passed and fixed in that position with roll pins.
I didnt want to do this prior to the test as if it failed in the fixed position there would be the holes in the bar that were not required but further
holes would have to be drilled for the repositioned roll pins, hence weekening the bar!
I have to say I was supprised it passed on the bar over to the rear curuit but wot the hell.
Steve
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