Haynes Forums - Flexible Brake Pipes

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I have a proportioning valve from a Fiat Uno. Its M10x1 and It has a rising piston on it so can be adjusted if needed by making a mount that stops the piston rising at a set point.

You are not allowed regular knob adjustable ones for IVA.

Cheers
Stot

Brake pressure switch part number: 113 945 515h.

Thanks for the suggestions, I shall look into it...

Meanwhile, my shinny new flexi brake lines arrived today, thanks Sylvain for the help! They are extremely high quality and worth every penny imo :)

Thank you Josh.
If you're happy, I'm happy!
They look pretty cool in blue too :)

Quote:

Originally Posted by Josh (Post 92521)

It looks like your caliper is on the wrong side here, the bleed nipple should be on top no?

Cheers
Stot

Well spotted, the bleed nipple should ideally be on top. However with the calipers swapped around there are issues running the handbrake cable.

I decided to fit them this way round and live with the fact that I'll have to take the calipers off to bleed them. It's not a big job, wheels off and then two bolts per caliper that hold them to the caliper carriers.

Josh

Quote:

Originally Posted by Stot (Post 92483)

I thought you were, but that the adjustment has to be disabled. No info as to how, so its possibly down to testers discretion.

What about bias bars on the pedal? With no remote adjuster cable?

I had been thinking of getting an obp pedal box, but these all come with bias bars for two cylinders. I am not averse to making a fixed bias for the iva test though if necessary.

Also, regarding bias calculations, a few years ago I wrote an excel spreadsheet for our formula student team to calculate the brakes needed. Anyone interested?

We'll need a few accurate details on static weight distribution from a finished car as inputs, and ideally the COM height, but I doubt anyone has put a car on a tilt table to measure that.

Quote:

Originally Posted by beardydave (Post 92636)

I thought you were, but that the adjustment has to be disabled. No info as to how, so its possibly down to testers discretion.

This may have been at one point but the manual says,

Quote:

Originally Posted by IVA Manual-09B Service Brake Control / Mechanical Components

Note 4: Hydraulic valves that only operate automatically and react to vehicle loading or braking forces are permitted (Load Sensing and Gravity valves) Manually adjusted valves (other than to permit presetting the automatic function of a valve) are not permitted to be fitted even if they are rendered un-adjustable.

I was going to fit one too til I was pointed to that. :o

Cheers
Stot

you could use bias bar on a dual cylinder set up, as it's not an adjustable valve. I think they expect to see the bias bar made un-adjustable though.....

Quote:

Originally Posted by Stot (Post 92632)

It looks like your caliper is on the wrong side here, the bleed nipple should be on top no?

Cheers
Stot

Josh (incase you are still on here at all!) just bumping this up as i was just sizing up the route of my rear disc flexi brake lines last weekend. Did you go with this routing in the end? I would have thought it looks a bit tight, but it may be the picture?

I was planning to go onto the rear chassis rail - just pictured in the bottom right of your photo...