Re: 105 Big Brake Conversion

["David E. Wilson" <david_e_wilson@domain.elided>]

Hi, List,

Could you give me approximate years and models for these BMW calipers? I go 
to the junkyard frequently and see lots of 80s BMWs.

David WIlson
Coconut Grove, FL


>From: Simon Favre <simon@domain.elided>
>Reply-To: Simon Favre <simon@domain.elided>
>To: Alfa Digest <alfa@domain.elided>
>Subject: Re: 105 Big Brake Conversion
>Date: Fri, 30 Jul 1999 16:57:23 -0700
>
>Wille R wrote:
>
> >We also have an interesting but very easy and effective mod on the
> >105-series, namely big BIG 4 pot callipers on the front brakes
> >that just bolt on. For this we get the ATE callipers from the
> >upper end 3 or 5 series BMW or off the 7 series.
>... {SNIP}
> >
> >You will also have to split the calliper and remove the spacer, so
> >that the calliper will fit onto the solid disc of the Alfa, as
> >apposed to the wider ventilated disc off the BMW. You will also
> >find that you will have to use shorter bolts to hold the
> >calliper's two halves together, as the original ones will be too
> >long with the spacer removed.
>
>If you're fitting a monster caliper from a car that used ventilated
>discs, why not put a ventilated disc on the Alfa? Putting a BIG caliper
>on the old style solid disc sounds like a recipe for warped discs to
>me.
>
> >UNFORTUNATELY this "BOLT-ON" modification will only work on the
> >later (possibly 1969 onwards) 105 series cars, i.e. those that
> >take the bigger front pad (ATE 112). On the cars with the
> >older/smaller callipers/pads, you will find that the hole spacing
> >of the callipers are too close together to take the ATE BMW
> >calliper.
>
>Yes, but there is another alternative for the 67-68 cars with Ate. You
>can fit the Brembo off the GTV-6/Milano/75, which has the smaller bolt
>spacing. You do have to fit ventilated discs which are custom made,
>but the combination works quite well. Pre-67 cars with disc brakes
>tend to have to update the whole front hub to fit a better caliper.
>


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