Brake Line Charts - Alfa Romeo Bulletin Board & Forums
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post #1 of 14 (permalink) Old 02-18-2016, 07:42 AM Thread Starter
Brake Line Charts

In order to keep my own sanity I have created some brake line charts over the years. These are all based on cars and brake lines that I've gotten my hands on. I've tried to be as accurate as possible but I welcome any corrections and/or critique. I will add to this thread as I gather more info.

REVISED to Version 2


So here is the chart for Duetto brake lines running ATE calipers. The includes the lines with and without vacuum boosters:

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The pictures aren't all that clear - Here is a PDF file:

Duetto Brake and Fuel Lines V2.pdf

And for those who may be interested, I have contracted a source to create brake lines using my patterns in stainless steel with the correct fittings. If you are doing a complete brake job and not inclined do the bending and flairing yourself this is a welcome option. I currently have them for '66-'68 ATE Duettos with and without boosters, '69 1750 Spiders with dual boosters and '69 GTVs with dual boosters. These are all floor pedal, left hand drive, USA version systems. I will have hanging pedal lines in the near future. Also, the Duetto lines should be the same for the Stepnose GTs with the exception of the long rear line (R1 in my designation) which is longer but I don't yet have that value or the pattern.

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Pricing is yet to be determined but if you are interested, please PM me and I'll see what kind of a discount I can get. I do know that the SS was reasonably priced compared to buying conifer tubing and all the fittings and could be a cost savings if you have to buy the flaring tools for one job.
ossodiseppia, Craig_m67 and jantar like this.

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Last edited by gprocket; 03-02-2016 at 10:27 AM.
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post #2 of 14 (permalink) Old 02-18-2016, 07:48 AM Thread Starter
And here are the charts for the '69 GTV:

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post #3 of 14 (permalink) Old 02-21-2016, 07:57 AM
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can i get that in lighweight titanium tubing?

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post #4 of 14 (permalink) Old 02-21-2016, 05:15 PM Thread Starter
Yes but the fittings would be made out of Osmium...

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post #5 of 14 (permalink) Old 03-25-2016, 08:59 AM
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Rich, wondering how you are coming along with the hanging pedals? I would like to replace all of my brake lines and this and your previous thread were great info. I have a '71 1300 Junior, the style after the stepnose. Three lines coming off the brake master cylinder, one going to front left, one to front right and the third going to the rear.

I'm not sure if these were redone in the past and are correctly set up. I have the short booster and dual cup reservoir. Thanks.
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post #6 of 14 (permalink) Old 03-25-2016, 09:55 AM Thread Starter
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Originally Posted by 5thinline View Post
Rich, wondering how you are coming along with the hanging pedals? I would like to replace all of my brake lines and this and your previous thread were great info. I have a '71 1300 Junior, the style after the stepnose. Three lines coming off the brake master cylinder, one going to front left, one to front right and the third going to the rear.

I'm not sure if these were redone in the past and are correctly set up. I have the short booster and dual cup reservoir. Thanks.
The hanging pedals are a dream compared to the earlier brake lines. That said, I haven't had a chance to lay out the front lines yet. What you describe sounds correct, FWIW.

I did run into to a delay with the lines that I am making up currently. The fabricator is suddenly swamped (who knew that the was a season to brake lines) and they are behind by a couple of months. I need my lines back to finish a couple of projects so I am going to hand made a set and then send them back to get digitized.

I am hoping that anyone that has expressed an interest in stainless steel lines can hold off a bit while this gets sorted out.

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post #7 of 14 (permalink) Old 03-25-2016, 10:08 AM
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Brake lines

Rich,

PLEASE do this for the 101 Spiders!

Ok, I'm resorting to begging!

Ray

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post #8 of 14 (permalink) Old 03-25-2016, 12:11 PM Thread Starter
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Rich,

PLEASE do this for the 101 Spiders!

Ok, I'm resorting to begging!

Ray

LOL, No need to beg but I would need a donor set of lines to digitize...

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post #9 of 14 (permalink) Old 04-01-2016, 10:30 AM
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Has anybody done this for dual circuit, floor pedal spider? If not I am just starting to put mine back together. It will be a few weeks until I cut brake lines but if the info isn't posted here someplace I'll so so here.
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post #10 of 14 (permalink) Old 04-01-2016, 12:58 PM Thread Starter
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Has anybody done this for dual circuit, floor pedal spider? If not I am just starting to put mine back together. It will be a few weeks until I cut brake lines but if the info isn't posted here someplace I'll so so here.
The dual circuit Spiders are virtually the same as the GTV with the exception of the length of the rear line (my R4a) which I believe is 4" shorter (114" vs 118").

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post #11 of 14 (permalink) Old 04-01-2016, 02:32 PM
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Thanks! I see now. I looked quickly at your table and saw only a single booster, I didn't realize it was one table per circuit.
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post #12 of 14 (permalink) Old 03-08-2017, 08:10 PM
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Looking at the diagrams, am I missing seeing the flex hoses, or are they not included? I have the rear flex pulled, to be replaced, and where I live Alfa parts are not easy to find, but we discovered that the front hoses match a Hillman Hunter (1" longer). Before I take the several hour journey to the supplier, if I can call him and spec the hose, he can tell me if he has an equivalent.

Flex hose rear: 39 cm long
Male on both ends
From Pro. Valve end: Is it M10.1 Din and if so, what flare?
To Tee end: Is it 10mm.1? and it looks like a flat end, no flare.

Thanks
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post #13 of 14 (permalink) Old 09-07-2018, 03:55 PM
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66 - 68 Duetto Chart Brake Line Chart

Hi Rich et al,

As a starting point, a huge thanks Rich for taking the time to put this posting / chart together - much appreciated!

I'm deep into the complete brake line redo of my '67 GTV which, when I acquired the car, didn't have a booster - it had clearly been bypassed. At the risk of being wrong, I'm making the assumption that the brake lines for a '67 GTV would have had exactly the same lines / tubing ends - albeit the lengths of the lines would be somewhat different due to the geometry of each car (wider / longer, etc...). Assuming this assumption to be true, I have a couple questions from your chart:

1) For Line F3B (Vac Booster to Tee Fitting), I'm thinking the Vac Booster tubing end should be a "M Bubble" whereas the Tee Fitting tubing end should be a "M Flare". On your chart, it indicates the opposite of this.
2) When you refer to "MALE" in the two Fittings columns, I assume this has the same meaning as "M Flare" - is this a correct assumption?

Lastly, I've attached pictures of the two Vac Booster female connections (both identical w/ a "flat" bottom) and the 4Way Tee middle female connection ("conical shaped" bottom). To my ill-experienced and clearly novice eyes, this is what I've based my above conclusions from.

Best regards and I look forward tp comments from the BB!

Chuck
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post #14 of 14 (permalink) Old 07-30-2019, 02:57 PM
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Hi Rich et al,

As a starting point, a huge thanks Rich for taking the time to put this posting / chart together - much appreciated!

I'm deep into the complete brake line redo of my '67 GTV which, when I acquired the car, didn't have a booster - it had clearly been bypassed. At the risk of being wrong, I'm making the assumption that the brake lines for a '67 GTV would have had exactly the same lines / tubing ends - albeit the lengths of the lines would be somewhat different due to the geometry of each car (wider / longer, etc...). Assuming this assumption to be true, I have a couple questions from your chart:

1) For Line F3B (Vac Booster to Tee Fitting), I'm thinking the Vac Booster tubing end should be a "M Bubble" whereas the Tee Fitting tubing end should be a "M Flare". On your chart, it indicates the opposite of this.
2) When you refer to "MALE" in the two Fittings columns, I assume this has the same meaning as "M Flare" - is this a correct assumption?

Lastly, I've attached pictures of the two Vac Booster female connections (both identical w/ a "flat" bottom) and the 4Way Tee middle female connection ("conical shaped" bottom). To my ill-experienced and clearly novice eyes, this is what I've based my above conclusions from.

Best regards and I look forward tp comments from the BB!

Chuck
Looks like this thread has been quiet for almost a year, but I am going breathe some life into. I too very much appreciate the Table Rich has provided. I am putting into Excel to help me do the math. I also need to add the disclaimer that my car was completely disassembled by a PO in the first 15 years of it's life, so I can't say that anything is as it left Alfa's control.

First to address Chuck's question (probably already figured it out for himself since it is 10 months old). I am working with Rev. 4 of his GTV chart.
In my 1969 USA Spider with Dual Circuit, the line from the front booster to the 3 Way Tee (F4 in the chart) splitter has a DIN flare at the booster end and a SAE flare at the tee which if you strictly interpret the position of the From To columns with the fitting columns, my car matches the table as far as type of flare. When I measure the OD of the threads with a caliper on the fittings I am very close numbers to the sizes in the table, so I feel confident that Rich's values there are correct. That is what I am planning to order.
2. I would find the pictures of DIN and SAE on the board. That made it clear to me. This is my first time replacing brake lines so I was confused at first too. Local AROC member going to help me flare everything after I get it roughed in.

For Line R4B, the strict interpretation of column location is backwards, but I can't imagine that is causing anyone problems.

The disparities I have found between the table and my car are R5, R6 and C2. For R5 and 6 I have an SAE flare at the tee end. That would seem to be consistent with the Tee at the end of F4 that is installed at the firewall for the front brakes. The chart lists DIN for the Tee end. For C2 I have an SAE flare at the end that connects to the flex house instead of a DIN as listed in the chart. This too would seem to be consistent when mating to a flex hose as seen in F5 and F6. BTW the flexible clutch line had no retaining nut on as found. It did pass through the hole, I guess I should be thankful for that.

My only other comment to the chart and I recognize this is nitpicking, but F5 and F6 don't connect To the Caliper like R5 and R6 do, but instead connect to the fixed point and flex hose in the wheel well.

Last edited by bal4833; 07-30-2019 at 03:12 PM. Reason: found an error
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