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Thread: Girling brakes on S1

  1. #1
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    Girling brakes on S1

    Hello everyone, I wonder if it is possible to mount the Girling braking system of a fulvia S2 replacing the S1 Dunlop system. A supplier offers a kit of this link but after requesting information I have not received an answer from him.


    https://www.ricambilanciafulvia.it/e...st-series.html


    Cheers

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    Legendary Lancista 1,6 HF's Avatar
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    Re: Girling brakes on S1

    If the original S1 Dunlops are still in good shape (or capable of being rebuilt), I have no idea why you'd want to spend that kind of money to convert to Girlings.
    Ed Levin
    Fulvia 1,6 HF

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    Legendary Lancista fay66's Avatar
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    Re: Girling brakes on S1

    I agree with Ed, why?
    The Dunlop brakes are more than adequate if serviced regularly, the handbrake is a must for servicing every year.
    I've travelled over a lot of Europe including over the Alps and the Pyrenees over the last 19 years and 33, 000 miles, not kms, with no problems whatsoever.
    Just seems your money could be better spent, rather than changing something that isn't a problem.
    My 2c doesn't have a servo, and looking at some of the problems with servos over the years, I'm pleased I haven't one, nor have I ever felt the need.
    Brian

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    Re: Girling brakes on S1

    Hello, the question is rather out of curiosity since the supplier says that the kit is installed without having to make any modification to the vehicle. I wonder how it is possible to keep the 18mm brake pump if the girling system had the 21mm one. On the other hand I have a girling series 2 set in good condition. As for the dunlop system I discovered that in the back I have a caliper of 1" 5/8 on one side (possibly jaguar or lancia flavia) and one marked 22 on the other side that I think is 1" 3/8. This explains the braking difference when passing the VAT control on the rear axle.

    I take this opportunity to ask if it is worth resleeve to them and if it is expensive (since there are specialists like Huib and some of Jaguar who sell modern alternatives of the same system). Do you know any good specialist in the United Kingdom in resleeve dunlop calipers? My car is a Fulvia Sport so i think I would need get a set of 1" 5/16 (marked 21). Any member of the forum would have a rear set to sell? I attach photos of the state of the cylinders.

    Cheers

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    Re: Girling brakes on S1

    Quote Originally Posted by lolomovil View Post
    Hello, the question is rather out of curiosity since the supplier says that the kit is installed without having to make any modification to the vehicle. I wonder how it is possible to keep the 18mm brake pump if the girling system had the 21mm one
    The switch to Girlings on an S1 has been done before. One important detail and reason why it works is that the total area of two pistons in a Girling caliper equals the area of one piston in a Dunlop caliper. So the force remains the same, and also the amount of fluid that needs to be moved for the same travel of the brake pad.

    But the only argument I've ever heard why the switch was done was "I had working Girling calipers, but no working Dunlop ones, so I went for the cheap solution". I've never heard anybody claim that the switch was an improvement.

    Bernt

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    Re: Girling brakes on S1

    I have fitted the replacement cylinders from BG Braking Developments to my S1 .

    See the link below

    http://www.bgdevelopments.co.uk/prod...ssemblies.html

    My Fulvia is used for historic rallying / sprints / hillclimbs and the braking has been very satisfactory. (Braking efficiency in historics is more often a factor of the tyres rather than the calipers.)

    There are a range of pads available which are conventionally made with steel backplates, a vast improvement on the Dunlop pads. The use of more modern cylinder seals is another bonus.

    One can fit the BG cylinders directly onto the caliper. It is a tight fit on my 13inch rims though.

    PM me if you want to discuss it further.

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    Legendary Lancista Marnix's Avatar
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    Re: Girling brakes on S1

    Maybe needs to be clarified a bit, confusion between Girling... and Girling.

    The brakes fitted to the S1 Fulvias (and Flavias and Flaminias) are DUNLOP. Somewhere along the timeline in the sixties Dunlop brake systems was taken over by Girling, keeping the Dunlop brake systems in their range for a while (probably for compatibility/spares), even making Dunlop style piston but with the Girling logo for some sizes. So on the S1 Fulvia, it is Dunlop brakes, and the BG are Dunlop replacements. Later the Dunlop range was discontinued by Girling, and hence on S2/3 Fulvias you will find true Girling designed brakes.

    I am curious to know what type of Fulvia you fitted them to, and what size of rear brakes you fitted from BG. Fitting too large rear size brakes (without a brake limiter) is a potential problem: the rear brakes will lock before the front ones, will may potentially cause the car to sweep around. Actually, even the smallest size 21 (made by Dunlop only for Lancia) on the normal coupe are slightly too large, and there is still some tendency for the rear ones to lock before the front ones. The 1 1/4 from BG is a 20 (not 21), and is probably the best size you could fit on the normal coupe (not the Berlina, nor the brake limiter equiped 1.3S), even slighly better than the original 21.
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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