Mike McKinstry
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 posted on 11/3/02 at 08:26 PM |
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Brake deceleration valve.
Hi All, can anybody tell me if I DO need to fit the brake deceleration valve (off donor sierra)which regulates rear brake pressure in accordance with
weight transfer.I know "sylva " do use this in their sierra based Striker and kitcar mag.August2001 stated you must use this-has anybody?
If so where has it been plumbed and must it be mounted at any particular angle?
I have also seen advertised a master cylinder set up already for 60/40 front/rear bias -would this do away for need of valve.
Father-in law has a ginetta which locks up rear end and spins car under extreme braking
as rear is so light-would like to avoid this scenario in my MK,
MIke.
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theconrodkid
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| posted on 11/3/02 at 09:23 PM |
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Acording to some you dont need one but you are better off putting one in now than later if you need one.
I used a FIAT PANDA one can be made adjustable with a bolt,you will see how if you go that route.
any probs gis a shout. 
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bob
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 posted on 11/3/02 at 10:09 PM |
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I was told by MK that its not needed,but i'm keeping my ears open on this issue as some people are fitting them. 
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locodude
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 posted on 11/3/02 at 10:39 PM |
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Hi guys
My car runs bog stock mk2 escort brakes (no servo) and sailed through the test so it must depend which system you are using. You can make a bias valve
for about a fiver. mail me off list if you want the file or look on Dave Andrews Robin Hood website. Don't laugh he's a very clever bloke!
Chris (northern git)
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Mike McKinstry
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| posted on 12/3/02 at 07:25 PM |
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Mike McKinstry
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| posted on 12/3/02 at 07:28 PM |
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Thanks Guys,brake bias bar seems nice idea -will check out web site and get back to you if I decide to go another route!
Mike.
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ewanspence
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 posted on 13/3/02 at 10:03 AM |
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I looked at the "Dave Andrews Robin Hood website" and like the idea of the mini option. Where in a Mini is it located (save me hunting about). Is it
beside the master cylinder or under the car at the backend? I need to get the heater and wiper mechanism anyway so this will just add to my scrapyard
fun.
Ta
Ewan.
Visit the MegaGrip site :-
http://www.geocities.com/ewanspence/
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stephen_gusterson
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| posted on 13/3/02 at 03:55 PM |
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hi ewan.
its on the rear sub frame.
I have been told its not been fitted since the dark ages, and also it was fitted mid eighties so take your choice.
I suspect you will have probs getting one from a scrappy and i woulndt be happy with a 20 year old one.
www.minispares.co.uk
do a ready made one with adjustment - costs about 35 quid tho. It also has non metric fittings.
The sierra one is inertia driven and needs to be mounted at the correct angle - so get it right. Changinf the angle is effectively adjustment. It has
metric fittings of course.
I have the mini one.
If you use the sierra one it wont pass sva rolling road test cos there is no inertia - they apparently test it in the compound by a rolling stop
test.
atb
steve
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Marcus
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| posted on 14/3/02 at 08:38 PM |
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We used an Aldan valve, cost 45+vat from Demon Tweeks. Turns out it's identical to the Mini version - can make for a tenner!
Bugger.
Still we needeed it PDQ and Demon offered overnight delivery.
Marcus
PS is the Panda one similar? Just got rid of one!
Bugger!
Marcus
Marcus
Because kits are for girls!!
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Ian Pearson
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| posted on 16/3/02 at 07:58 PM |
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Hi Guys,
I have Cortina uprights and Escort drums. Have been considering the Sierra deceleration valve and had discounted the mini valve for SVA reasons. How
are you getting around the "ADJUSTABILITY" part of the test?
TIA, Ian.
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Marcus
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| posted on 20/3/02 at 08:27 PM |
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Re Mini valve. The tester at Derby SVA actually advised us on that route and even said just fit it and we'll adjust it for you when you get here!
Decent bloke.
As far as adjustability is concerned he said as long as it's under the bonnet, and not adjustable from the cockpit, it's ok.
If you're unsure, drill the adjuster and lockwire it to the chassis.
Marcus
Marcus
Because kits are for girls!!
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bob
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 posted on 20/3/02 at 11:57 PM |
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This is where some SVA testers differ,at the Yeading SVA they want the lock nut welded so as no adjustment can be made.
This means a re-test to show it has been done once they are set on the 1st test.
The brakes are also tested again to see if you have adjusted inbetween tests.
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Mike McKinstry
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| posted on 22/3/02 at 09:58 AM |
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Can anyone confirm part no. for mini regulator valve,as described above, is Grk 6002-and presumably non.metric fitts,
Thanks Mike.
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bob
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| posted on 22/3/02 at 04:20 PM |
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Also a fiesta regulator has recently been used,and passed SVA.
I've robbed this bit of info from the Feb issue of the LOCOST CAR CLUB newsletter.
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theconrodkid
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| posted on 22/3/02 at 07:15 PM |
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Fit a Fiat Uno one dead easy to make adjustable,ask merlin and no holes to drill!
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Mike McKinstry
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| posted on 24/3/02 at 08:21 PM |
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Conrodkid,thats Uno NOT Panda or are they the same??
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Dick Axtell
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 posted on 25/3/02 at 04:06 PM |
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Hi all -
Please don't use that ****ing Sierra 'G'-valve. I used to work on their design & development. We had to make them very flow concious, in order to
get sufficient response. Under rapid brake applications, line pressure can rise before the inertia-sensing ball closes off the valve.
The later Fiesta screw-in type valve is recommnded, if you believe a valve is really necessary (with Cortina M16 fronts, 8" Ford rear drums).
Dick Axtell
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bob
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| posted on 25/3/02 at 08:17 PM |
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I'm running discs at the back so i'm looking at options.
For all i know discs might not make any difference,the valve conrod used from a FIAT is very simple and easy to fit so it looks like i'll go that
way.
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David Jenkins
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| posted on 26/3/02 at 08:29 AM |
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quote:
The later Fiesta screw-in type valve is recommnded, if you believe a valve is really necessary (with Cortina M16 fronts, 8" Ford rear drums).
Dick,
I'm using 9" rear drums, so maybe my setup is marginal.
Which type of Fiesta has the limiting valve?
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Dick Axtell
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| posted on 26/3/02 at 04:34 PM |
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I'm using 9" rear drums, so maybe my setup is marginal.
Which type of Fiesta has the limiting valve?
Dave -
Look for a Mk2 Fiesta (or later), which uses the black, servo-mounted steel tube type mcyl. There are 2 valves, (screwed into the mcyl outlet port),
because the Fiesta has X-split braking system.
ATB
Dick
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David Jenkins
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| posted on 27/3/02 at 09:00 AM |
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Ta!
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theconrodkid
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| posted on 27/3/02 at 07:04 PM |
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Re brake valve for Mike should read UNO £17.55 from my suplier e me if you want one.
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