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<  Braking  ~  Brake Proportioning Valve

PostPosted: Tue Jun 03, 2008 6:53 am
GoldGoldJoined: Tue Nov 30, 2004 2:34 pmPosts: 56Location: Utah
On a Alfa BB thread about improving GTV6 braking it was mentioned that braking could be improved on the earlier cars by putting in a later brake propotioning valve. Does anyone on this board have experience with this modification? I notice that IAP lists two valves; one through car 6831 (81-85) and ont for the post 631 cars. Would the later valve be a direct bolt on or would modifications be required?

Terry Johnston
83 CA GTV6 ( original owner)

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PostPosted: Wed Jun 04, 2008 7:07 pm
User avatarPlatinumPlatinumJoined: Sat Apr 23, 2005 11:12 pmPosts: 276Location: Brisbane, Australia
I thought the later cars had a joiner in place of the pressure limiting valve (it is not true proportioning). I know that there are plenty over here that have tossed away the limit valve and put in the joiner from a late model - it is a bolt in.

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PostPosted: Thu Jun 05, 2008 12:09 am
User avatarVerdeVerdeJoined: Mon Nov 22, 2004 2:37 amPosts: 2295Location: Brisbane, Australia

I dont use the limiter in my car just installed a joiner. Works very well after bleeding the system of course..

Transaxle Alfas Haul More Arse
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PostPosted: Thu Jun 05, 2008 4:21 am
User avatarPlatinumPlatinumJoined: Wed Sep 14, 2005 3:01 pmPosts: 441Location: G Britain
so it begs the question, why did alfa install the proportioning valve in the first place, if removing it results in such an improvemnt in braking. Surely removing it, screws up the brake balance for every day driving, or why put one in in the first place?


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PostPosted: Thu Jun 05, 2008 5:26 am
VerdeVerdeJoined: Tue Jun 13, 2006 9:47 pmPosts: 765Location: Fresno, Ca.
I think, for legal reasons mostly, the factory wanted to make absolutely sure that when the brakes locked up the fronts locked first. That way the car would be more likely to go straight forward in a skid instead of trying to swap ends.

'Tis my theroy anyway.


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