Brake Pipe Unions

[ArthurH 7]

We are just about to make a new set of brake pipes for the 205GTI.  I have a flare tool; I'll buy some tubing and a bag of unions.  The championship rules constrain us to use the standard calipers and rear cylinders.  To save me checking each one individually, are all the OEM brake threads 'standerdised' across the car (including the master cylinder)?  E.g., M8 everywhere?

Any good tips before I start?

[welshpug 1,665]

Mostly M10x1.0, a 1.9 will have a pair of 12x1.0 into one side of the brake pressure limters

[petert 596]

Can you manage a double flare though? I single flare would surely be illegal? I've approached this a bit differently and changed to 3AN hose where appropriate/possible. Here are some Speedflow part numbers you might find useful:

 

T200-C03 200 series -3 hose Teflon® Stainless Steel Braided Hose

260-03 life saver

380-03 1/8 NPT adaptor

344-03 dual seat

201-03 straight hose ends

https://www.speedflowdirect.com.au/

You probably have a similar supplier in the UK. And if you do it stainless fittings, hose and lines, you'll have no issues with corrosion.

Edited Thursday at 06:27 AM by petert

[ArthurH 7]

Thanks Peter, just for the avoidance of doubt :-), you are using the braided hose throughout the braking system, i.e., no rigid pipe at all?  If so, the brake pedal feel is not more spongy? 

[petert 596]

No, I use hard lines on the straight parts, but around the difficult to bend parts, I'm using the stainless teflon hose. Even just changing to stainless teflon hose, replacing rubber hoses will improve the pedal feel. I did that on my road 306. I have a friend who did his entire 206 GTi180 in stainless teflon hose and the pedal feel is magnificent.

[ArthurH 7]

I think we may follow your lead and go for a hybrid solution. Picking up from Mei, I think we will have M10x1 throughout - except for the two sides of the Willwood bias valve (1/8NPT?)